# History of wireless telegraphy and broadcasting in Australia/Topical/Publications/Australasian Radio World/Contents
## Australasian Radio World - Contents
### 1930s
#### 1936
##### 1936 08

CONTENTS:
Pick-Ups . . . . . . . . . . . . . . . . . . . . . . 3
"Air-Commodore" Has High Gain and Selectivity . . . . 4
Radio Makes the Airways Safe . . . . . . . . . . . . . 5
Pedal-Driven Teleradio . . . . . . . . . . . . . . . . 6
"Empire Shortwave Three" . . . . . . . . . . . . . . . 7
A Simple Five-Metre Battery Receiver . . . . . . . . . 14
Palec Vacuum Tube Voltmeter . . . . . . . . . . . . . 16
Adding Class B to the "Sky-Cruiser Battery Four" . . . 17
Radio Ramblings . . . . . . . . . . . . . . . . . . . . 19
Systematic Servicing Brings Best Results . . . . . . . 20
"Simplified D.W. Battery Money-saver" . . . . . . . . . 22
The ABC of Multi-Range Meter Design . . . . . . . . . . 27
A Nine·-Range D.C. Multi-Meter . . . . . . . . . . . . . 29
Radio Step by Step (3) . . . . . . . . . . . . . . . . . 32
The Lighter Side of DX . . . . . . . . . . . . . . . . 33
Prize-Winning Transmitter Has Worked All Continents . . 34
Choosing and Using a Vacuum-Tube Voltmeter . . . . . . . 36
More About the 6L6 Beam Power Amplifier . . . . . . . . 39
The AU-Wave All-World DX News . . . . . . . . . . . . . . 43
DX Champion Logs 600 Stations in Five Years . . . . . . . 44
"Card-Hunting" is Not Sole Aim of Dxing . . . . . . . . . 46
Identifying Shortwave Stations. . . . . . . . . . . . . . 47
Universal Time Conversion Indicator . . . . . . . . . . . . 48
DX Contest Arouses Widespread Interest . . . . . . . . . . 49
DX News and Views . . . . . . . . . . . . . . . . . . . 50
Logging South American Stations . . . . . . . . .. . . . . 51
Frequency Re-Shuffle For Japanese Broadcasters . . . . . . . . 52
Visiting DX Stations (3). . . . . . . . . . . . . . . . . . 53
China to have High-Power S.W. Station . . . . . . . . . . 55
All-Wave All-World DX Club-List of Members . . . . . . . . 56

##### 1936 11

CONTENTS:
"Pick-Ups" . . . . 3
Radiokes Factory Makes Thousands of Parts Weekly . . . . 4
Sydney Ambulances To Carry Radio . . . . 5
The Outdoor Portable . . . . 6
Hints And Tips For Set Designers . . . . 8
The Beginner's Battery Two . . . . 10
The Month On Shortwave . . . . 13
The Air-Ace Dual-Wave Five . . . . 14
What’s New In Radio . . . . 16
Newcastle Hamfest A Great Success . . . . 18
This Pentode Business . . . . 20
Acoustical Labyrinth In New Stromberg-Carlson Release . . . . 23
XMHD— A Popular Chinese Broadcaster . . . . 26
A Super-Regenerative Five-Metre Receiver . . . . 27
Radio Ramblings . . . . 30
Making A Reiss Microphone . . . . 32
Building An Output Meter . . . . 33
The A.T.R.S. Bulletin . . . . 35
The Cathode Ray Oscillograph At Work (3) . . . . 36
All-Wave All-World DX News . . . . 39
Shortwave Stations Of The World (3) . . . . 40
DX Doings On The Short Waves . . . . 43
VK Amateurs — Additions and Amendments . . . . 44
Shortwave Station Addresses . . . . 45
DX Notes and News . . . . 46
All-Wave All-World DX Club — List of Life Members . . . . 48

##### 1936 12

CONTENTS:
Radio Gifts For Christmas . . . . 3
"Scout Battery Three" . . . . 6
Radio Ramblings . . . . 10
High Quality Reproduction At Low Cost . . . . 14
New £50,000 Factory Planned By Ever-Ready . . . . 16
The "Scout Superhet Four" . . . . 17
This Pentode Business (2) . . . . 22
The Story Of Television (1) . . . . 24
Radio Step By Step (5) . . . . 26
Party Radio Magic . . . . 28
The Cathode Ray Oscillograph At Work (4) . . . . 30
Radio In India . . . . 33
The A.T.R.S. Bulletin . . . . 34
What's New In Radio . . . . 36
Radio Book Reviews . . . . 37
Round The N.Z. "B" Stations . . . . 38
VK Amateur Stations — Additions And Amendments . . . . 40
All-Wave All-World DX News . . . . 41
Radio VK4DO Is Model Amateur Station . . . . 42
Schedules Of Japan's New Shortwave Service . . . . 42
Shortwave Stations Of The World (4) . . . . 43
DX Notes And News . . . . 45

#### 1937
##### 1937 02

CONTENTS:
Assembling And Wiring The "Fidelity Broadcast Five" . . . . 3
Radio Ramblings . . . . 6
Building A Code Practice Oscillator . . . . 10
Radio Book Reviews . . . . 13
What's New In Radio . . . . 14
The A.T.R.S. Bulletin . . . . 16
Licensing Of Servicemen Urgently Needed . . . . 16
Nevi Series Of Articles On Amateur Radio . . . . 17
Breaking Into The Amateur Game . . . . 18
Learning The Code . . . . 20
"Getting Out" On Five Metres . . . . 23
First Radio Signal From U.S. Heard In 1923 . . . . 25
5-Metre Push-Pull Oscillator . . . . 26
The Story Of Television (3) . . . . 28
Hints And Tips For DX Beginners . . . . 30
The Lure Of DX Listening . . . . 32
Radio Step By Step (6) . . . . 33
Background Hiss In Superhets . . . . 34
Five-Metre Enthusiasts Asked To Use Superhets . . . . 36
All-Wave All-World DX News . . . . 37
DX Report Forms Save Time And Ensure Replies . . . . 38
Preparing Reports In German And Italian . . . . 39
Times To Listen For World Shortwave Stations . . . . 40
The Month On Shortwave . . . . 41
DX News Flashes . . . . 42
DX Notes And News . . . . 43
VK Amateur Stations — Additions And Amendments . . . . 45
New Range Of Radiokes Power Transformers . . . . 46
World Shortwave Stations (6) . . . . 47
W.I.A. Field Day . . . . 48

##### 1937 03

CONTENTS:
The Story Of The Ever Ready Air Cell . . . . 3
Field Tests On First Air Cell Receivers . . . . 4
The Companionette Three . . . . 5
Fidelity Broadcast Five — Adding Bass Boosting . . . . 7
The A.T.R.S. Bulletin . . . . 8
Radio Ramblings . . . . 10
Building A Regenerative S.W. Pre-Selector Unit . . . . 14
Amateur Transmits From Bed In Hospital . . . . 18
Breaking Into The Amateur Game (2) . . . . 20
The Story Of Television (4) . . . . 24
Background Hiss In Superhets . . . . 26
Radio Step By Step (7) . . . . 29
A Portable Line Amplifier . . . . 32
What's New In Radio . . . . 33
Radio Book Reviews . . . . 35
All-Wave All-World DX News . . . . 37
Round The N.Z. "B" Stations (2) . . . . 38
Shortwave Stations Of The World (7) . . . . 39
DX Notes And News . . . . 41
Manly Radio Club Notes . . . . 42
Some DX Highlights . . . . 43
Ham Jargon . . . . 44
VK Amateur Stations — Additions And Amendments . . . . 45
Big Five-Metre Field Day Planned for March 7 . . . . 46
Leaves From A Dxer's Logbook . . . . 47
New Members All-Wave All-World DX Club . . . . 48

##### 1937 04

CONTENTS:
When PCJ Was PCJJ . . . . 3
The 1937 International All-Wave Six . . . . 6
Radio Ramblings . . . . 10
B B.C. Television Signals Heard In Africa . . . . 14
DX Notes And News . . . . 16
Assembling And Wiring The Companionette Three . . . . 18
ZL Amateur Transmitters . . . . 21
A Two-Band Crystal Controlled Transmitter . . . . 29
Verifying All Continents . . . . 36
Breaking Into The Amateur Game . . . . 38
The A.T.R.S. Bulletin . . . . 39
Intermittent Faults Are Hardest To Locate . . . . 39
All-Wave All-World DX News . . . . 43
What's New In Radio . . . . 44
Leaves From A Dxer's Log-Book . . . . 45
"Radio World" Vol. 1 — Index To Technical Features . . . . 48

##### 1937 05

CONTENTS:
"Radio World" Guide To The Show . . . . 3
The 1937 Empire All-Wave Three . . . . 6
Assembling, Wiring And Aligning The 1937 International All-Wave Six . . . . 10
Radio Ramblings . . . . 14
The Story Of Television (5) . . . . 18
Breaking Into The Amateur Game . . . . 20
Keeping In Touch With Darwin . . . . 23
25 Years In Amateur Radio (1) . . . . 24
Seven-Valve Dual-Waver Gives Excellent Results . . . . 26
Inverse Feedback Conquers "Pentode Tone"! . . . . 28
Image Frequency Interference On The Short Waves . . . . 30
Round The N.Z. "B" Stations (3) . . . . 32
Latest Radiokes Tri-Colour Dial A Striking Success . . . . 35
The A.T.R.S. Bulletin . . . . 36
Radio Step By Step (8) . . . . 38
"Keep Up The Good Work" . . . . 40
All-Wave All-World DX News . . . . 41
All-Continent Hook-Up In 15 Minutes . . . . 42
Leaves From A Dxer's Log Book . . . . 43
DX Notes And News . . . . 45
North Suburban Radio Club News . . . . 47
What's New In Radio . . . . 48

##### 1937 06

CONTENTS:
The Eaglet All- Wave Two . . . . 3
Communications Type Superhet For Amateurs . . . . 6
Radio Ramblings . . . . 10
Assembling And Wiring The 1937 Empire All-Wave Three . . . . 14
25 Years In Amateur Radio (2) . . . . 18
World Shortwave Stations . . . . 21
Breaking Into the Amateur Game (5) . . . . 29
Across The Atlantic On Five Metres . . . . 32
Radio Step By Step . . . . 34
What's New In Radio . . . . 35
All-Wave All-World DX Club — New Members . . . . 37
The A.T.R.S. Bulletin . . . . 38
Eliminating Man-Made Static . . . . 38
Locating And Curing Hum . . . . 39
The All-Wave All-World DX News . . . . 41
Shortwave Review . . . . 42
DX News And Views . . . . 45
VK Amateur Stations — Additions And Amendments . . . . 47

##### 1937 07

CONTENTS:
The Amateur Communications Eight . . . . 3
Radio Ramblings . . . . 10
New Radio Installations Regulations . . . . 15
The Jones' Super-Gainer Two . . . . 16
25 Years In Amateur Radio (3) . . . . 18
"Radio Aid" Explorers Track Down Noise . . . . 21
Designing Vibrator Type "B" Eliminators . . . . 22
Assembling And Wiring The 1937 Eaglet All-Wave Three . . . . 26
Radio Step By Step (10) . . . . 27
The A.T.R.S. Bulletin . . . . 28
Breaking Into The Amateur Game (6) . . . . 30
What's New In Radio . . . . 34
The All-Wave All-World DX News . . . . 37
Trans-Pacific DX On 10 Metres . . . . 38
Erecting 45-Foot Masts . . . . 40
Shortwave Review . . . . 41
DX News And Views . . . . 44
Climbing 6ME's 400-Foot Mast . . . . 48

##### 1937 08

CONTENTS:
"Sky-King Dual-Wave Five" . . . . 3
Ham Jargon . . . . 5
"Air-Cell Pentagrid Seven" . . . . 6
"Fluttering On The Short Waves" . . . . 8
Radio Ramblings . . . . 10
Trans-Tasman Reception With "Companionette" . . . . 15
YL Radio Enthusiast Builds 15-Valve S.S. Super . . . . 16
High Fidelity Amplifier Uses Push-Pull 2A3's . . . . 18
Over 30,000 Miles Covered In Round Table Hook-Up . . . . 20
The "Jones' Super-Gainer Two" . . . . 22
Breaking Into The Amateur Game . . . . 26
Home-Built Talkie Plant Gives Excellent Performance . . . . 29
Multi-Band Transmitter Uses Unique Assembly . . . . 30
The A.T.R.S. Bulletin . . . . 32
Tracking Down Distortion . . . . 32
What's New In Radio . . . . 34
New 5-Metre Records . . . . 36
25 Years In Amateur Radio (4) . . . . 37
All-Wave All-World DX News . . . . 39
Shortwave Review . . . . 40
DX Contests Arouse Widespread Interest . . . . 42
DX News And Views . . . . 43
Round The Shacks (1) . . . . 44
Round The N.Z. "B" Stations (4) . . . . 45
Crown Radio Shift To Larger Factory . . . . 47

##### 1937 10

CONTENTS:
The "1937 Outdoor Portable Four" . . . . 3
Assembling And Wiring The "Tom Thumb Two" . . . . 8
Latest Radiokes Kit-Set Is The "Advance 1937" . . . . 10
Radio Ramblings . . . . 12
Radio Club Caters For Transmitters And S.W. Listeners . . . . 16
25 Years In Amateur Radio . . . . 18
VK Amateur Calls . . . . 21
A.C./D.C. Receiver Uses New Radiotron Barretter . . . . 32
Breaking Into The Amateur Game (9) . . . . 34
Nine-Channel Ultra S. W. Radio Telephone Link . . . . 38
What's New In Radio . . . . 40
A.T.R.S. Institute — Queensland Branch . . . . 42
Radio Step By Step (11) . . . . 44
All-Wave All-World DX News . . . . 45
Shortwave Review . . . . 46
DX News And Views . . . . 49
Zero Beat Radio Club Notes . . . . 50
Round The Shacks (3) . . . . 51
Shortwave Station Addresses . . . . 52

##### 1937 11

CONTENTS:
De Luxe Fidelity Eight . . . . 3
Valve Manufacture In Australia . . . . 8
Radio Ramblings . . . . 10
W.I.A. National Field Day On Dec. 4 . . . . 13
Breaking Into The Amateur Game (10) . . . . 14
Round The N.Z. "B" Stations (5) . . . . 18
The 1937 Outdoor Portable Four . . . . 20
25 Years In Amateur Radio (7) . . . . 24
Radio Step By Step (12) . . . . 26
Improved Operating Conditions For 1C6 On Shortwave . . . . 28
What's New In Radio . . . . 32
New Adelaide Station Has Up-to-date Transmitter . . . . 36
The All-Wave All-World DX News . . . . 37
Shortwave Review . . . . 38
Second "Radio World" S. W. Contest . . . . 39
DX News And Views . . . . 41
Ten Thousand Miles On Five Metres . . . . 42
Radio Aids Flying Doctor In Outback . . . . 43
Round The Shacks (4) . . . . 45
Shortwave Station Addresses . . . . 46
E. Neill Wins First S. W. DX Contest . . . . 47
VK Amateur Transmitters — Additions And Amendments . . . . 48

##### 1937 12

CONTENTS:
The A.C. "Empire All-Wave Three" . . . . 3
Tasman Crossed On "Five" . . . . 7
Radio Ramblings . . . . 10
Battery Amateur Communications Superhet . . . . 12
A 15-Watt Public Address Amplifier . . . . 15
25 Years In Amateur Radio (8) . . . . 18
Making A Reiss Microphone . . . . 20
15 And 25-Watt Public Address Amplifiers . . . . 22
Radio Step By Step (13) . . . . 25
Assembling And Wiring The De Luxe Fidelity Eight . . . . 26
Round The Shacks (5) . . . . 29
Fiftieth Transmitting Member Joins Lakemba . . . . 30
What's New In Radio . . . . 34
Breaking Into The Amateur Game (11) . . . . 38
All-Wave All-World DX News . . . . 41
Shortwave Review . . . . 42
Shortwave Station Addresses . . . . 44
DX News And Views . . . . 45
VK Amateur Transmitters - Additions And Amendments . . . . 47
Level Indicator For Public Address Systems . . . . 48

#### 1938
##### 1938 01

CONTENTS:
"Empire" Power Pack And Amplifier . . . . 3
1938 Contest For Best Amateur Telegraphist . . . . 8
Breaking Into The Amateur Game (12) . . . . 10
Radio Ramblings . . . . 12
Radio Valves In The Making (1) . . . . 14
Schedule Of PCJ Experimental Transmissions . . . . 16
Twenty-Five Years In Amateur Radio (9) . . . . 18
World Shortwave Stations . . . . 19
Battery Amateur Communications Superhet . . . . 29
Eight-Valve T.R.F. Receiver Gives High Quality Output . . . . 36
National Field Day An Enjoyable Outing . . . . 38
What's New In Radio . . . . 41
All-Wave All-World DX News . . . . 43
Shortwave Review . . . . 44
DX News And Views . . . . 47
Australian Trained Radio Servicemen's Institute — Queensland Division . . . . 48

##### 1938 02

CONTENTS:
The Fidelity Dual-Wave Six . . . . 3
New Ever Ready Factory Opened By Prime Minister . . . . 8
Radio Ramblings . . . . 10
More About The A.C. Empire All-Wave Three . . . . 14
Aden Amateur Station On The Air . . . . 16
Five Metres In S. Australia . . . . 18
VK2NO Advanced U.H.F. Receiver . . . . 19
Radio Valves In The Making (2) . . . . 24
Radio Step By Step (14) . . . . 27
Lavishly-Equipped Radio Service Workshop . . . . 29
What's New In Radio . . . . 32
Breaking- Into The Amateur Game (13) . . . . 35
The All-Wave All-World DX News . . . . 37
Shortwave Review . . . . 38
Third S.W. DX Contest . . . . 41
Round Table QSO Smashes Previous Record . . . . 42
Around The Shacks (6) . . . . 43
1937 Eventful Year For Shortwave Dxers . . . . 44
DX News And Views . . . . 47

##### 1938 03

CONTENTS:
Two-Band Portable Transmitter-Receiver . . . . 3
Battery-Operated Portable Transmitter . . . . 10
Radio Ramblings . . . . 12
Japanese B.C. Stations . . . . 15
Sydney Dxer Logs Europe on B.C. Band . . . . 16
Assembling And Wiring the Fidelity Dual-Wave Six . . . . 18
Two-Valve A.C. Shortwaver Uses Coil-Switching . . . . 20
Radio Valves In The Making (3) . . . . 24
A Triple-Range Valve Voltmeter . . . . 27
What’s New In Radio . . . . 30
Radio Step By Step (15) . . . . 32
Two-Valve Local Station Superhet. . . . . 35
All-Wave All-World DX News . . . . 37
Shortwave Review . . . . 38
Round The Shacks (7) . . . . 40
1938 Radio Handbook Now Available . . . . 43
Police Signals Heard 10,000 Miles . . . . 46
DX News And Views . . . . 47
Shortwave Station Addresses . . . . 48

##### 1938 04

CONTENTS:
Comet Superhet Four . . . . 3
Crown Releases Push-Button Kit For Set-Builders . . . . 6
Portable Five-Metre Transceiver . . . . 9
Radiokes 1938 D.W. Moneysaver Superhet . . . . 14
Pre-Selector Unit Sharpens Tuning, Increases Gain . . . . 16
50-Watt Transmitter For New Power Limit . . . . 18
Infinite Baffle Aids Tonal Fidelity . . . . 20
Shortwave Aerials For DX Reception (1) . . . . 23
"Eaglet" Gives Outstanding Performance . . . . 26
Building A Midget Three-Watt Amplifier . . . . 27
DX Contest Winner Has Logged Over 100 Countries . . . . 30
Tracking Down Power Interference (1) . . . . 31
What's New In Radio . . . . 33
The All-Wave All-World DX News . . . . 37
Sun-spot Activity Now Approaching Maximum . . . . 38
Shortwave Review . . . . 39
Hourly Tuning Guide . . . . 42
Fourth "Radio World" S.W. DX Contest . . . . 46
Round The Shacks (8) . . . . 46
DX News And Views . . . . 47
VK Amateur Transmitters — Additions And Amendments . . . . 47
Index Of Technical Features, "Radio World," Vol. 2 . . . . 48

##### 1938 05

CONTENTS:
The Air-cell Dual-wave Four . . . . 3
Radiokes Release New Range of Power Transformers . . . . 7
Radio Ramblings . . . . 8
The Comet Superhet Four . . . . 10
An Appreciation From A.T.R.S.I. . . . . 12
"Pirate" Uses Lakemba Club Call . . . . 14
The Triode And Its Applications . . . . 16
The Scout Battery Three . . . . 18
A Trip Through The Ever Ready Factory . . . . 22
Shortwave Aerials For DX Reception (2) . . . . 27
Tracking Down Power Interference (2) . . . . 30
What's New In Radio . . . . 34
A.O.C.P. Questions And Answers . . . . 39
All-Wave All-World DX News . . . . 41
Shortwave Review . . . . 42
DX Notes And News . . . . 45
Hourly Tuning Guide . . . . 47

##### 1938 06

CONTENTS:
The "Auto-Tune Dual-Wave Five" . . . . 3
Calstan Test Oscillator . . . . 5
Radio Ramblings . . . . 6
Radiokes Release Eight-Station Teletuner . . . . 10
More About The Air-Cell D.W. Four . . . . 11
Lakemba Club Holds Eighth Annual Reunion . . . . 14
32-Watt Amplifier Uses 6L6G's In Pushpull . . . . 18
A.O.C.P. Questions And Answers . . . . 20
World Shortwave Stations . . . . 22
Tracking Down Power Interference (3) . . . . 28
Round The Shacks (8) . . . . 32
What's New In Radio . . . . 33
All-Wave All-World DX News . . . . 39
Shortwave Review . . . . 40
Hourly Tuning Guide . . . . 43
American Radio Police Calls . . . . 44
Fourth S.W. DX Contest . . . . 45
DX News And Views . . . . 46
Ex-Fingerprint Expert Conducts PCJ Session . . . . 47

##### 1938 07

CONTENTS:
The "Auto-Tune Dual-Wave Five" . . . . 3
Model "Q" Console Is Latest S.T.C. Release . . . . 10
Four-Watt Beam Amplifier . . . . 11
Home Recording For The Amateur . . . . 14
Amateur Station Equipment (1) — Monitor And Modulation Meter . . . . 18
World Shortwave Stations . . . . 23
A.O.C.P. Questions And Answers . . . . 27
Pentode And Beam Tetrode Valves . . . . 29
200 Visitors Inspect Philips Valve Works . . . . 31
What's New In Radio . . . . 32
Palec "VCT" Valve And Circuit Tester . . . . 35
The All-Wave All-World DX News . . . . 37
Shortwave Review . . . . 38
Hourly Tuning Guide . . . . 41
Official Australian Radio Service Manual . . . . 45
DX News And Views . . . . 46
"1938 De Luxe Fidelity Eight" . . . . 47
International Amateur Prefixes . . . . 48

##### 1938 09

CONTENTS:
"Atlas All-Waver" . . . . 3
Brimar Releases New 6AG6-G Output Pentode . . . . 8
Rectifiers, Filters, And Hum . . . . 10
Radio Ramblings . . . . 12
The "Challenger Dual-Wave Six" . . . . 16
The "Ultra-Shorts" In Review . . . . 17
A.O.C.P. Questions And Answers . . . . 21
High Fidelity Reception Of Local Stations . . . . 24
Radio Reminiscences . . . . 27
The "1938 De Luxe Fidelity Eight" . . . . 28
The "Trans-Tasman U.H.F. Two" . . . . 30
What's New In Radio . . . . 32
Lectures On Oscillograph And Home Recording . . . . 35
"Empire" Power-Pack Wiring Plan . . . . 37
Philips Photo Cell Has Many Applications . . . . 38
Assembling And Wiring The "Air-Ace Communications Four" . . . . 39
"Vibra Dual- Wave Five" . . . . 44
Shortwave Review . . . . 45

##### 1938 10

CONTENTS:
"1938 Amateur Communications Eight" . . . . 3
"1938 Outdoor Portable Four" . . . . 6
Adding A Tuned R.F. Stage To The "Atlas All-Waver" . . . . 10
Portable Transmitter Taken On Radio Hike . . . . 12
EMI Makes Good Indicator For Absorption Frequency Meter . . . . 15
A.O.C.P. Questions And Answers . . . . 17
The Ultra-Searcher . . . . 20
Radio Book Reviews . . . . 22
Contest Winner VK2ADE Operates De Luxe Station . . . . 24
The "Ultra-Shorts" In Review (2) . . . . 25
Getting That Trophy-Winning "Verie" . . . . 28
1.4-Volt Valves Announced In States . . . . 30
What's New In Radio . . . . 32
Building The A.C. Version Of The "Air-Ace Communications Four" . . . . 36
All-Wave All-World DX News . . . . 39
Shortwave Review . . . . 40
Hourly Tuning Guide . . . . 44
Result Of Fifth DX Contest . . . . 45
O. Washfold Wins QSL Card Contest . . . . 47

##### 1938 11

CONTENTS:
Nineteen Range Combination Vacuum Tube Voltmeter And Multi-meter . . . . 3
17-Watt Amplifier Uses Push-Pull 6L6G's . . . . 8
Adding A Pentode Stage To The Atlas All-Waver . . . . 10
Aerial Beacon Erected On Ever Ready Building . . . . 12
Planning Radio Set Sensitivity . . . . 14
New Perth Transmitter Now On Air . . . . 16
Assembling And Wiring The 1938 Amateur Communications Eight . . . . 17
Assembling And Wiring The 1938 Outdoor Portable Four . . . . 21
CFGP Is British Empire's Most Northern Station . . . . 29
The "Ultra-Shorts" In Review . . . . 30
Coil-Winding Data For Philips EK2G Octode . . . . 31
Unique Home Recording Demonstration . . . . 32
What's New In Radio . . . . 34
Radio Book Reviews . . . . 36
All-Wave All-World DX News . . . . 37
Shortwave Review . . . . 38
Hourly Tuning Guide . . . . 43
DX News And Views . . . . 45

##### 1938 12

CONTENTS:
The "Sky-King Dual-Wave Five" . . . . 3
Resistance And Capacity Checker . . . . 6
Tasma 1.4-Volt Valve Receiver Gives Outstanding Results . . . . 7
More About The 5-Metre Super-Gainer . . . . 10
"Hi-Fi" Speaker Baffle . . . . 12
Radio For Bush Search Parties . . . . 14
Waverley And Hurstville Radio Club Notes . . . . 16
Improved Performance From 6K8G Converter . . . . 17
Home Recording (1) . . . . 21
World Shortwave Stations . . . . 23
5-Band 10- To 160-Metre 'Phone And C.W. Transmitter . . . . 29
What's New In Radio . . . . 34
All-Wave All-World DX News . . . . 41
Shortwave Review . . . . 42
Hourly Tuning Guide . . . . 46
5- And 10-Metre Transmitter Next Month . . . . 48

#### 1939
##### 1939 01

CONTENTS:
Queensland Demonstration Of New 1.4-Volt Valve Receiver . . . . 1
1.4-Volt Valves Ideal F or Country And Portable Radios . . . . 3
Rola Reproducers F or New 1.4-Volt Valves . . . . 8
Special Ever-Ready Cell For 1.4-Volt Valves . . . . 9
The "One-Four Portable Five" . . . . 10
"1939 Sky-King Dual-Wave Five" . . . . 18
Planning Receiver Selectivity . . . . 21
World Shortwave Stations . . . . 23
Home Recording (2) . . . . 30
National Field Day Outing . . . . 32
What’s New In Radio . . . . 34
Radio Book Reviews . . . . 35
Resistance And Capacity Checker . . . . 37
The All-Wave All-World DX News . . . . 39
Shortwave Review . . . . 40
Hourly Tuning Guide . . . . 45
Readers Invited To Join Australian Corps Of Signals . . . . 47

##### 1939 02

CONTENTS:
5- And 10-Metre 'Phone And C.W. C.C. Transmitter . . . . 3
Palec Primary Frequency Standard . . . . 10
Radio Ramblings . . . . 13
Building A Field Strength Meter . . . . 14
Assembling And Aligning The "One-Four Portable Five" . . . . 18
Home Recording (3) . . . . 21
Photographing Heart Beats . . . . 24
The D.B.K. 9- To 1000-Metre Communications Receiver . . . . 26
DX On The "Ultra-Highs" . . . . 29
Rola Gesture To Bush Fire Sufferers . . . . 32
What’s New In Radio . . . . 33
Vibrator Unit : Trans-Tasman P.B. Five . . . . 36
The All-Wave All-World DX News . . . . 37
Shortwave Review . . . . 38
Hourly Tuning Guide . . . . 45

##### 1939 03

CONTENTS:
5- And 10-Metre Phone and C.W. Transmitter . . . . 3
Stromberg-Carlson 1939 Dealers' Conference . . . . 6
Public Address Outfit Uses New Projection Unit . . . . 8
"One-Four Portable Five" On Test . . . . 9
The "Trans-Tasman All-Wave P.B. Five" . . . . 10
Radio Aids The Outback . . . . 13
Hurstville Radio Club Notes . . . . 16
Building A Pocket Multi-Meter . . . . 17
Building A Code Practice Oscillator . . . . 22
Learning The Code . . . . 23
How Dry Batteries Are Made . . . . 24
Acoustic Filter In Latest Rola Units . . . . 26
The 2NO Amateur Band Superhet . . . . 29
The Universal Receiver . . . . 31
What's New In Radio . . . . 35
All-Wave All-World DX News . . . . 37
Shortwave Review . . . . 38
Hourly Tuning Guide . . . . 45
All-Wave All-World DX Club — New Members . . . . 47
DX Alphabet — Phonetic Pronunciations . . . . 48

##### 1939 04

CONTENTS:
How To Make Home Recordings . . . . 3
Standardised Components For Set-Builders . . . . 6
Important New Rola Patent . . . . 7
160 Miles On Five Metres . . . . 8
Club Contests In Full Swing . . . . 10
"Sky-Hawk All-Wave Three" . . . . 12
This Thing Called "Q" . . . . 18
15 To 600-Metre Marine Receiver . . . . 22
The Velco 1939 Mastery Battery Five . . . . 27
Modern Trends In Set Design . . . . 32
What’s New In Radio . . . . 35
Leaves From A Serviceman’s Diary . . . . 37
"Find-The-Fault" Contest For Readers . . . . 38
Shortwave Editor Tests DX Champion Receiver . . . . 40
Shortwave Review . . . . 42
Hundreds Of Constructional Items In Back Issues — Special Offer To Readers . . . . 47

##### 1939 05

CONTENTS:
The Astra Dual-Wave Six . . . . 3
Lakemba Radio Club Reunion . . . . 10
1939 Companionette Three . . . . 12
Radio Ramblings . . . . 15
Find-The-Fault Contest . . . . 16
Hear The World On Tiny Tim . . . . 18
Keep Charging! . . . . 21
Experimenters — Get Down To "Ultra-Shorts" . . . . 22
Leaves From A Serviceman’s Diary (2) . . . . 24
Installing An Extension Speaker . . . . 26
One-Four Portable On 100-Mile Canoe Trip . . . . 30
The Ultra DX Three . . . . 32
What's New In Radio . . . . 38
1939 Australian Official Radio Service Manual . . . . 40
The All-Wave All-World DX News . . . . 41
Shortwave Review . . . . 42
Hourly Tuning Guide . . . . 46
Rola "Permacentric" Construction . . . . 48

##### 1939 06

CONTENTS:
The "Astra Dual-Wave Six" . . . . 3
The "Ultra DX Three" . . . . 6
New Ever Ready Batteries For 1.4-Volt Portables . . . . 8
Fight For Amateur Bands . . . . 10
Simple Portable Aerial . . . . 11
This Thing Called "Q" . . . . 12
More About The 1939 Companionette Three . . . . 15
A Portable Valve Checker . . . . 17
More Sets From Back Numbers . . . . 21
A.O.C.P. Questions And Answers . . . . 22
Experimenters - Get Down To Ultra Shorts . . . . 24
Installing An Extension Speaker . . . . 26
A Test-Bench Multi-Vibrator . . . . 28
Making A Reiss Microphone . . . . 31
Leaves From A Serviceman's Diary (3) . . . . 32
The Economy Fidelity Amplifier . . . . 33
What's New In Radio . . . . 36
Shortwave Review . . . . 41
Hourly Tuning Guide . . . . 46

##### 1939 07-08

CONTENTS:
Field Test On New S.T.C. Portable . . . . 3
"Sky-Chief Dual-Wave Five" . . . . 5
Outstanding Performance From "Our-Four" Portable . . . . 6
Indicator Lights For Radiogram . . . . 9
1939 Atlas All-Wave Three . . . . 10
Economy Fidelity Amplifier . . . . 13
Over 50 Entries For "Find-The-Fault" Contest . . . . 15
Bush Radio Rescue Test . . . . 19
Portables On Parade . . . . 21
Leaves From A Serviceman's Diary (4) . . . . 28
The Cathode Ray Oscillograph (l) . . . . 29
160 Miles On Five Metres . . . . 32
What's New In Radio . . . . 33
Three New Six-Inch Rola Models: Ideal For Portables . . . . 37
Sixth S.W. D.W. Contest . . . . 38
Shortwave Review . . . . 39
Hourly Tuning Guide . . . . 46

##### 1939 09

CONTENTS:
The Falcon Dual-Wave Four . . . . 3
Six-Band Frequency Meter . . . . 7
Latest Model Ultimate On Test . . . . 8
Wiring And Aligning The Sky-Chief Dual-Wave Five . . . . 10
The Cathode Ray Oscillograph (2) . . . . 12
Portable Gear For Bush Radio Tests . . . . 18
Radio Ramblings . . . . 20
Australian Broadcasting Stations . . . . 23
High-Gain Antenna For The Ultra-Highs . . . . 27
1939 Atlas All-Wave Three . . . . 29
Jottings From Readers . . . . 30
Leaves From A Serviceman's Diary . . . . 31
What's New In Radio . . . . 33
Shortwave Review . . . . 39
Hourly Tuning Guide . . . . 45

##### 1939 10

CONTENTS:
Picnic Portable Four . . . . 3
Vulcan Shortwaver . . . . 7
£40,000 S.T.C. Air Raid Shelter . . . . 7
New Era For Battery Radio . . . . 9
War News On The Short Waves . . . . 10
Learn The Morse Code . . . . 11
What's New In Radio . . . . 16
Falcon Dual-Wave Four . . . . 17
Testing Transformer Windings . . . . 18
World Shortwave Stations . . . . 19
1.4-Volt Shortwave Superhet . . . . 24
13.5 Watts From 2A3's In Push-pull . . . . 27
Sixth DX Contest Winner Relates His Experiences . . . . 31
Latest Loggings On Shortwave . . . . 33
Broadcast Band DX Notes . . . . 37

##### 1939 11

CONTENTS:
Fisk Radiola Portable Five . . . . 3
Two Communications "Supers." . . . . 5
Radio Club Notes and News . . . . 8
The Picnic Portable Four . . . . 9
Needle Pointers For Record Users . . . . 15
Leaves From A Serviceman's Diary (6) . . . . 18
Shortwave. And All-Wave Receivers From Back Numbers . . . . 20
Meters For A.G. And D.C. Measurements . . . . 22
What's New In Radio . . . . 26
Brown Projection Unit Popular With Public Address Operatives . . . . 28
Three New S.T.C. Releases . . . . 29
A Hint For Smoother Reaction . . . . 30
Shortwave Review . . . . 31
Broadcast Band DX Notes . . . . 36
Broadcast Band DX Contest . . . . 37
Radio In The Outback . . . . 38
All-Wave All-World DX Club-New Members . . . . 40

##### 1939 12

CONTENTS:
Loop Portable Three . . . . 3
The Story of R.C.S. Radio (1) . . . . 6
R.C.S. Releases Five-Band Coil Assembly . . . . 8
Mullard World-Master Consolette Gives Outstanding Performance . . . . 10
Junior Class "B" Amplifier . . . . 13
Air-Scout Communications Six . . . . 15
Service Equipment (2) . . . . 18
Beam-A-Scope Noise-Killer Aerial . . . . 23
The Vulcan Shortwaver . . . . 26
What's New In Radio . . . . 27
Two New Amplion Speakers . . . . 31
Shortwave Review . . . . 32
"Radio World" All-Wave Oscillator . . . . 37

### 1940s
#### 1940
##### 1940 01

CONTENTS:
The Daventry Dual-Waver . . . . 3
The Story Of R.C.S. Radio (2) . . . . 6
Five-Band Communications Superhet . . . . 8
Service Equipment (3) . . . . 10
Vulcan Pre-Selector Unit . . . . 13
Choosing A Microphone . . . . 15
"Radio World" All-Wave Oscillator . . . . 17
Waverley Radio Club Notes . . . . 25
What's New In Radio . . . . 26
New Headquarters For Marconi School . . . . 28
"Communications Eight" A Fine Performer . . . . 30
Shortwave Review . . . . 31
Broadcast Band DX Notes . . . . 37

##### 1940 02

CONTENTS:
New A.C.-Battery "Duo" Portable . . . . 3
Book Reviews . . . . 4
1940 Companionette Three . . . . 5
Modulated Oscillators . . . . 9
Midget Three-Watt Amplifier . . . . 11
World-Cruiser Communications Eight . . . . 13
The Story of R.C.S. Radio (3) . . . . 27
What's New In Radio . . . . 29
Long-Horn Public Address Speakers . . . . 31
Shortwave Review . . . . 33

##### 1940 03

CONTENTS:
CONSTRUCTIONAL
"Wonder One," 5-band, 1-valve . . . . 23
"Dandy," 3-valve a.c. superhet. . . . . 13
"World Standard for 1940" . . . . 3
GENERAL TECHNICAL
U.S. Circuits for the 1940-41 Season . . . . 9
Country Set Circuit Design . . . . 19
A Group Trainer for Morse Code . . . . 11
TEST EQUIPMENT
Laboratory Service for Readers . . . . 20
Testing Radio Components . . . . 33
The Output Meter . . . . 21
SHORT WAVE SECTION
The Month's Loggings . . . . 30
Station Schedules and Changes . . . . 29
Ultra-High-Frequency Notes . . . . 32
JUNIOR TECHNICAL
The Workshop Bench . . . . 36
Care of Tools . . . . 37
TRADE NOTES
"Delta" Test Equipment . . . . 35
Radio Art Union . . . . 35
SPEEDY QUERY SERVICE
Answers to Readers' Problems . . . . 39

##### 1940 04

CONTENTS:
CONSTRUCTIONAL
"Junior" Short-wove Converter . . . . 3
"Bedsider" 2-valve Battery T.r.f. . . . . 7
" R.E." Portable Kit-set . . . . 16
"Scout" Battery-operated T.r.f. . . . . 38
" R.C.S. Version of the Picnic Portable . . . . 14
GENERAL ARTICLES
Letters to the Editor . . . . 13
Radio Saves the Fruit Crop . . . . 13
Air-Test No. 1 . . . . 37
Hints and Tips . . . . 42
TEST EQUIPMENT
Valve and Circuit Testers . . . . 9
Laboratory Service for Readers . . . . 43
SHORT-WAVE SECTION
The Month's Loggings . . . . 34
Station Schedules and Changes . . . . 33
Special Notice to DX Club Members . . . . 36
AMPLIFIER SECTION
Amplifiers for Home Use . . . . 17
Amplifier Championship . . . . 19
"Baby Grand" Amplifier . . . . 21
"Big Boy" Power Amplifier . . . . 29
"Fundamental" Power Supply . . . . 25
JUNIOR TECHNICAL
Soldering . . . . 44
Novel Wet Cell . . . . 45
TRADE NOTES
Amplifier Equipment . . . . 20
Morse Code Kit . . . . 42
SPEEDY QUERY SERVICE
Answers to Readers' Problems . . . . 47

##### 1940 05

CONTENTS:
CONSTRUCTIONAL -
"De-Luxe Fidelity 8" . . . . 3
"12-Volve Super Set" . . . . 9
"Mystery Dual-waver" . . . . 15
"Vibra" P.A. Amplifier . . . . 18
"Junior" S. W. Converter for Batteries . . . . 37
GENERAL TECHNICAL -
Crystal circuits . . . . 34
Modest Kitsets . . . . 35
Headache Corner . . . . 17
The Sniper Post . . . . 13
Gang's All Here . . . . 40
Valve Characteristics . . . . 43
AMPLIFIER SECTION
Diphonic Reproducers . . . . 26
Further Notes on Fidelity . . . . 21
AMPLIFIER CHAMPIONSHIP . . . . 24
SHORT-WAVE SECTION
Review . . . . 29
The Month's Loggings . . . . 30
The DX Club . . . . 33
JUNIOR TECHNICAL
Twist Drills . . . . 44
Amplifier Hints . . . . 45
Hints and Tips . . . . 42
Handy Saw . . . . 44
TRADE NOTES
Rola Expands . . . . 15
Murdoch's Kitsets . . . . 35
Philips Valves . . . . 41
Telsen Two-range Meters . . . . 42
Mullard Booklet . . . . 43
SPEEDY QUERY SERVICE
Answers to Readers' Problems . . . . 47

##### 1940 06

CONTENTS:
CONSTRUCTIONAL -
"Fidelity Six" . . . . 3
"Mystery Dual-Waver" . . . . 17
"Vibra Fidelity Amplifier" . . . . 21
"War News Booster Unit" . . . . 35
GENERAL TECHNICAL -
"Old Reliable" . . . . 9
Set Building as a Hobby . . . . 11
AMPLIFIER SECTION -
Fidelity Amplifier for Country Home . . . . 21
Amplifier Championship . . . . 23
Elimination of Distortion . . . . 27
SHORT-WAVE SECTION -
From Ill-fated Oslo . . . . 14
Hour by Hour Tuning Guide for War News . . . . 24
Review . . . . 29
The Month's Loggings . . . . 30
Short-Wave Tuning Guide . . . . 32
JUNIOR TECHNICAL -
Hints and Tips . . . . 42
Earthing the Receiver . . . . 44
Soldering Practice . . . . 45
TRADE NOTES -
Free Price List . . . . 42
New Radiokes Company . . . . 43
SPEEDY QUERY SERVICE -
Answers to Readers' Problems . . . . 47

##### 1940 07

CONTENTS:
CONSTRUCTIONAL —
"Tip-Top Three-Four Superhet" . . . . 5
Standard A.C. Power Unit . . . . 19
Two Novel Circuits From America . . . . 25
GENERAL TECHNICAL —
Battery Chargers . . . . 11
Using An R.F. Oscillator . . . . 15
Rola Introduces "Kappa" Cones . . . . 35
AMPLIFIER SECTION —
Amplifier Championship . . . . 22
SHORT-WAVE SECTION —
Review . . . . 28
The Month's Loggings . . . . 30
JUNIOR TECHNICAL —
Hints and Tips . . . . 37
Building a Galvanometer . . . . 38
TRADE NOTES —
W . G. Watson Release 1940 Test Equipment . . . . 40
Meter Repairs . . . . 40
Free Resistor De-coder . . . . 40
Bargain Lines at Murdock's Radio Sale . . . . 42
SPEEDY QUERY SERVICE —
Answers to Readers' Problems . . . . 41

##### 1940 08

CONTENTS:
CONSTRUCTIONAL —
American-Style Communications Nine . . . . 5
Direct-Coupled Circuits . . . . 15
A Novel Power Unit . . . . 20
GENERAL TECHNICAL —
The A.B.C. of Multi-Range Meter Design . . . . 29
Aerials for Better Reception . . . . 38
AMPLIFIER SECTION —
Amplifier Championship . . . . 23
SHORT-WAVE SECTION —
Review . . . . 31
Loggings . . . . 32
Short-wave Broadcast Station List . . . . 34
JUNIOR TECHNICAL —
Hints and Tips . . . . 40
A Simple Electric Motor . . . . 42
J.T. Queries . . . . 43
Cutting Threads with Dies and Taps . . . . 43
TRADE PARADE —
Air Test of Latest Breville Receiver . . . . 19
Bargains from Invincible Radio . . . . 27
Vealls 1940 Catalogue . . . . 27
New Philips Valve Chart . . . . 27
SPEEDY QUERY SERVICE —
Answers to Readers' Problems . . . . 45

##### 1940 09

CONTENTS:
CONSTRUCTIONAL —
The Winning Amplifier . . . . 11
American-Style Communications Nine . . . . 15
Star Battery D/W Five . . . . 17
Velco Crystal Set . . . . 41
AMPLIFIER SECTION —
Amplifier Contest . . . . 5
SHORT-WAVE SECTION —
Review . . . . 30
Help Wanted . . . . 31
Loggings . . . . 32
JUNIOR TECHNICAL —
How to Build a Morse Key . . . . 42
J. T. Queries . . . . 43
Random Jottings . . . . 43
TRADE PARADE —
Air Test of New Stromberg-Carlson Portable . . . . 28
Latest Radiola Model No. 282 . . . . 38
New Rola 5-9 . . . . 40
Free Catalogue From U.R.D. . . . . 40
Morse Sets From John Martin . . . . 40
Radio Book Review . . . . 40
SPEEDY QUERY SERVICE —
Answers to Readers' Problems . . . . 45

##### 1940 10

CONTENTS:
CONSTRUCTIONAL —
Reinortz Three . . . . 5
Itsy-Bitsy Mantel Model . . . . 13
Velco Hi-Fidelity Five . . . . 17
TECHNICAL —
Problems With 1.4 Valves . . . . 11
Oscillator Grid Currents . . . . 25
Intermediate Transformers . . . . 27
Don'ts for Battery Charging . . . . 38
SHORT-WAVE SECTION —
Review . . . . 30
Radio Engineer from Japan . . . . 30
The Month's Loggings . . . . 32
TRADE PARADE —
Calstan Portable Reviewed . . . . 28
Ultimate "World-wave" Model . . . . 29
New Trimmers for R.C.S. . . . . 36
Book Reviews . . . . 42
SPEEDY QUERY SERVICE —
Answers to Readers' Problems . . . . 41

##### 1940 11

CONTENTS:
CONSTRUCTIONAL —
Trans-Port . . . . 5
Straight Four . . . . 13
All-wave Oscillator . . . . 19
Criterion Crystal Set . . . . 24
TECHNICAL —
Direct-coupled Phase-changers . . . . 9
Further Championship Circuits . . . . 12
How to Use a Morse Key . . . . 25
H.T. from Accumulator . . . . 27
SHORT-WAVE SECTION —
Review . . . . 29
This Month's Loggings . . . . 30
Short-wave Stations of the World . . . . 33
TRADE PARADE —
Mardel Fan . . . . 38
Newcomer to Delta Range . . . . 38
Morse Combination Units . . . . 38
Expansion at John Martin's . . . . 39
New Dials by Radiokes Pty. Ltd. . . . . 39
Transverse Cutting Gear . . . . 39
Power Rheostats by I.R.C. . . . . 39
A.W.A. Modulated Oscillator . . . . 39
SPEEDY QUERY SERVICE —
Answers to Readers' Problems . . . . 41

##### 1940 12

CONTENTS:
CONSTRUCTIONAL —
D.W. 13/42 . . . . 5
Xmas Portable . . . . 7
Tip Top Superhet . . . . 11
Tone Corrector . . . . 30
TECHNICAL —
Speaker Transformers . . . . 15
Dial Tracking . . . . 16
Loud-Speaker Impedances . . . . 18
SHORT-WAVE SECTION —
Short-wave Review . . . . 20
War News Around the Clock . . . . 22
This Month's Loggings . . . . 24
New Members of All-Wave All-World DX Club . . . . 28
TRADE PARADE —
Raymart Range at John Martin's . . . . 29
Kiddies' Xmas Gifts . . . . 29
Special Service at Davis Radio Co. . . . . 29
"Exporters" . . . . 29
City Store's Many Years in Radio . . . . 29
SPEEDY QUERY SERVICE —
Answers to Readers' Problems . . . . 33

#### 1941
##### 1941 01

CONTENTS:
CONSTRUCTIONAL —
Countryman's Six . . . . 5
Xmas Portable . . . . 23
Push-Pull Proposition . . . . 43
GENERAL TECHNICAL —
Scott Communications Receiver . . . . 13
How to Use the "Radio World" A. W. Oscillator . . . . 17
An Interesting Circuit from Western Australia . . . . 20
The "Lilley" Amplifier . . . . 29
The 1940 Circuits . . . . 30
Dobson's Amplifier . . . . 41
A Novelty Set . . . . 51
New Laboratory Service . . . . 55
TRADE PARADE —
Latest Kriesler Release . . . . 49
Two Attractive Receivers from S.T.C. . . . . 53
Fan Disc Locking Washers Now Available . . . . 54
City Store's Entry into Manufacturing Trade . . . . 54
Spitfire Dial . . . . 54
New Philips Valve Booklet . . . . 54
SHORT-WAVE SECTION —
Review . . . . 32
Loggings . . . . 35
SPEEDY QUERY SERVICE —
Answers to Readers' Problems . . . . 57

##### 1941 02

CONTENTS:
CONSTRUCTIONAL —
The Club Special . . . . 11
Local-Tone Four . . . . 13
The Standard Crystal Set . . . . 30
GENERAL TECHNICAL —
Compensated Acoustics . . . . 5
TRADE PARADE —
Counter Checkers . . . . 29
Two Mullard Portables . . . . 28
Free Foxradio Order Pads . . . . 28
Mullard Valve Chart Reprinted . . . . 28
SHORT-WAVE SECTION —
Loggings . . . . 18
SPEEDY QUERY SERVICE —
Answers to Readers' Problems . . . . 33

##### 1941 03

CONTENTS:
CONSTRUCTIONAL —
The Club Special . . . . 5
Acoustic Compensated Superhet . . . . 25
GENERAL TECHNICAL —
Compensated Acoustics . . . . 15
Code Practice Oscillator . . . . 40
Radio Tools . . . . 45
TRADE PARADE —
Radiola Review . . . . 41
New Lines from Levenson's . . . . 42
Parts Required? . . . . 42
Paramount Review . . . . 47
SHORT-WAVE SECTION —
Review . . . . 32
Loggings . . . . 34
SPEEDY QUERY SERVICE —
Answers to Readers' Problems . . . . 49

##### 1941 05

CONTENTS:
CONSTRUCTIONAL —
"All-World Two" . . . . 5
Code Oscillator for A.C. . . . . 9
Build a "Servi-Meter" . . . . 15
Crown "C.R.P." Six . . . . 30
"Porto-Gram" Amplifier . . . . 39
TECHNICAL —
Simple Volume Expansion . . . . 10
Correct Field Excitation . . . . 36
SHORT-WAVE SECTION —
Notes by L. J. Keast . . . . 42
Loggings of the Month . . . . 44
New Stations . . . . 44
New Schedules for London . . . . 47
SERVICEMEN'S SECTION —
Build a "Servi-Meter" . . . . 15
Systematic Servicing . . . . 19
New Oscillograph by Paton . . . . 19
Vibrator High-tension Units . . . . 24
Valve Chart Available . . . . 28
Dealer Proposition . . . . 34
Correct Field Excitation . . . . 36
Alignment of Permotune Units . . . . 37
Trade Parade . . . . 49
SPEEDY QUERY SERVICE —
Answers to Readers' Problems . . . . 50

##### 1941 07

CONTENTS:
CONSTRUCTIONAL —
"Vibra 4" for Countryman . . . . 5
5-Band Modulated Oscillator . . . . 11
Thirteen-watt Amplifier . . . . 15
Power Oscillator . . . . 29
TECHNICAL —
How to Use an Oscillator . . . . 32
Modern Sound for Modern Hotels . . . . 33
Speedy Query Service . . . . 34
SHORT-WAVE SECTIONS —
Conditions Affecting Reception . . . . 20
Short-wave Review . . . . 23
Loggings of the Month . . . . 24

##### 1941 08

CONTENTS:
CONSTRUCTIONAL —
"Trade Builder Five" Mantel Model . . . . 5
All-wave One-valve Receiver . . . . 19
The Crystal Circuit to End All Crystal Circuits . . . . 32
Amplifier for Fidelity at Low Volumes . . . . 19
Pre-amplifier Circuit for Microphones . . . . 31
TECHNICAL —
Curing Instability in Modern Superheterodynes . . . . 15
Attaining High Speed at the Morse Code . . . . 13
What Is "Radio Location"? . . . . 30
Free Technical Data Chart Offer . . . . 38
Analysing Push-pull Output Circuits . . . . 33
SHORT-WAVE SECTION —
Loggings of the Month . . . . 24
Short-wave Review . . . . 22
New Members of the DX Club . . . . 34
TRADE SECTION —
New "Westex" Cabinets . . . . 35
Philips' 50 Years of Progress . . . . 35
Mullard Mantel Models Reviewed . . . . 29
Ultimate Catalogue Issued . . . . 37

##### 1941 09

CONTENTS:
CONSTRUCTIONAL —
Signal Tracer for Servicemen . . . . 5
Simplest Five-Valver . . . . 11
"Vibra Four" as "Trade Builder" . . . . 29
TECHNICAL —
Balance Conditions in Push-pull Output . . . . 30
Technical Queries . . . . 38
SHORT-WAVE SECTION —
Questions They Ask the B.B.C. . . . . 17
Short-wave Review . . . . 22
Logging of the Month . . . . 24

##### 1941 10

CONTENTS:
CONSTRUCTIONAL —
1941 "Dandy" . . . . 7
Radiotronics Tone-Control Amplifier . . . . 13
Five-way Tone-Control Switch . . . . 30
TECHNICAL —
Battery Circuit Contest . . . . 5
Stability by Neutralisation . . . . 6
A Technical Explanation of Loading . . . . 9
A Fidelity Circuit from U.S.A. . . . . 10
Technical Queries . . . . 33
SHORT-WAVE SECTION —
Short-wave Review . . . . 18
Loggings of the Month . . . . 20

##### 1941 11

CONTENTS:
CONSTRUCTIONAL —
Inter-office Communicator . . . . 5
Dual-wave Vibrator Set . . . . 7
"Nugget" Dual-waver . . . . 11
Handy 12-watt Amplifier . . . . 11
Elementary Signal Tracer . . . . 19
TECHNICAL —
Interesting Experiments with Amplifiers . . . . 21
How to Use Your Oscilloscope . . . . 23
Beat Frequency Oscillator . . . . 26
Answers to Queries . . . . 37
SHORT-WAVE SECTION —
Why They Change the B.B.C. Wavelengths . . . . 20
Notes from My Diary, by L. J. Keast . . . . 28
Loggings of the Month . . . . 30
Battery Circuit Contest Coupon . . . . 37

##### 1941 12

CONTENTS:
CONSTRUCTIONAL —
Acoustic Compensated Superhet . . . . 5
"My Own" Fidelity Receiver for Locals . . . . 11
A Medium-cost Signal Tracer . . . . 17
1942 Version of "Tip-Top" . . . . 21
TECHNICAL —
Powerful Battery Set Circuit . . . . 15
The Meaning of Condenser Ratings . . . . 27
Answers to Queries . . . . 41
SHORT-WAVE SECTION —
Notes from My Diary, by L. J. Keast . . . . 30
Loggings of the Month . . . . 32
New Stations . . . . 36
TRADE NEWS —
Rothermel-Brush Pickups . . . . 24
New Amplion Speaker . . . . 14

#### 1942
##### 1942 01

CONTENTS:
CONSTRUCTIONAL -
Signal Tracer for Battery Operation . . . . 13
Countryman's Seven-valve Dual-waver . . . . 23
A Portable Battery Circuit . . . . 9
Renovating Radio Cabinets . . . . 10
TECHNICAL -
Direct-coupled Phase-changers . . . . 5
Five-way Tone Control . . . . 12
Fundamentals of the C.R.O. . . . . 15
Some Battery Set Considerations . . . . 20
SHORT-WAVE SECTION -
Notes from My Diary . . . . 24
Loggings of the Month . . . . 26
New Stations Heard . . . . 25
THE SERVICE PAGE -
Answers to Queries . . . . 34
Battery Circuit Contest Results . . . . 11

##### 1942 02

CONTENTS:
CONSTRUCTIONAL -
Tried and Tested One-valver . . . . 5
Detector Unit for Amplifiers . . . . 17
Re-building Radio Batteries . . . . 19
Alternative Bias Amplifier . . . . 21
TECHNICAL -
Victorian Champion Amplifier . . . . 9
Two Effective Battery Circuits . . . . 11
Baffling the Loud-speaker . . . . 14
Crystals for Frequency Control . . . . 16
The Reduction of Harmonic Distortion . . . . 22
SHORT-WAVE SECTION -
Short-wave Review . . . . 24
Tokyo's Broadcast Propaganda . . . . 25
The Month's Loggings . . . . 26
New Stations . . . . 26
Latest Loggings . . . . 28
THE SERVICE PAGE -
Wanted - Old Transmitting Valves . . . . 18
Answers to Queries . . . . 30

##### 1942 03

CONTENTS:
CONSTRUCTIONAL -
"Little Companion" . . . . 5
TECHNICAL -
Economy in Amplifier Design . . . . 13
Copper Wire Production . . . . 14
Harmonics in Reproduction . . . . 15
SHORT-WAVE SECTION -
Breaking into DX . . . . 22
Short-wave Review . . . . 24
New Stations . . . . 25
Loggings of the Month . . . . 26
THE SERVICE PAGES -
Guide to Back Numbers . . . . 18
Answers . . . . 30

##### 1942 04

CONTENTS:
CONSTRUCTIONAL -
The Latest Signal Tracer . . . . 5
High Fidelity Amplifier . . . . 11
TECHNICAL -
Test Bench Arrangement . . . . 16
"Radio Step by Step"- Part 1 . . . . 18
SHORT-WAVE SECTION -
Contempt for Tokyo Propaganda . . . . 17
Short-wave Review . . . . 20
New Stations . . . . 21
Loggings of the Month . . . . 22
THE SERVICE PAGES -
Answers . . . . 26

##### 1942 05

CONTENTS:
CONSTRUCTIONAL -
Adding A.V.C. to "Little Companion" . . . . 5
TECHNICAL -
Strange Theories and Facts . . . . 6
The Alignment of Modern Receivers . . . . 10
Radio Step By Step (Part 2) . . . . 15
The Triplex Single . . . . 18
SHORT-WAVE SECTION -
Short-Wave Review . . . . 20
New Stations . . . . 21
Loggings of the Month . . . . 22
THE SERVICE PAGES -
Answers . . . . 26

##### 1942 06

CONTENTS:
CONSTRUCTIONAL -
Circuit for a Two-valve Portable Set . . . . 15
Simple Set Testing without Meters . . . . 18
TECHNICAL -
Tone Compensation for Scale Distortion . . . . 5
The Construction and Operation of Meters . . . . 7
A Battery Quiz . . . . 9
Technical Press does a Vital Job . . . . 11
Dealing with the Problem of Instability . . . . 12
A Radio Crossword Puzzle . . . . 14
Radio Step by Step (Part 3) . . . . 16
SHORT-WAVE SECTION -
Short-wave Review . . . . 20
New Stations . . . . 21
Loggings of the Month . . . . 22
THE SERVICE PAGES -
Answers . . . . 26

##### 1942 07

CONTENTS:
CONSTRUCTIONAL -
Interesting Circuit Suggestions . . . . 15
Wave Trap to Improve Sensitivity . . . . 18
TECHNICAL -
About Screws and Screw-Threads . . . . 5
Radio Step by Step - Part 4. . . . . 7
Modern Set Building Methods . . . . 9
SHORT-WAVE SECTION -
Short-wave Review . . . . 19
Loggings of the Month . . . . 19
New Stations . . . . 22
THE SERVICE PAGES -
Answers . . . . 26

##### 1942 08

CONTENTS:
CONSTRUCTIONAL -
A New Version of "Little Companion" . . . . 5
Making Most of the Milliammeter . . . . 9
TECHNICAL -
Why no Technical Radio in Programmes? . . . . 6
A New Light Source . . . . 14
Some Notes on Servicing Vibrator Sets . . . . 15
Radio Step by Step - Part 5 . . . . 18
Parts of Maintenance of Receivers . . . . 24
SHORT-WAVE SECTION -
Short-Wave Review . . . . 20
Loggings of the Month . . . . 22
New Stations . . . . 23
THE SERVICE PAGES -
Answers . . . . 26

##### 1942 09

CONTENTS:
CONSTRUCTIONAL -
The "Victory Set" . . . . 5
How to Make a Metal Chassis . . . . 16
TECHNICAL -
Great News for Enthusiasts . . . . 11
Fresh Ideas in Circuits - No. 3 . . . . 12
Radio Step by Step - Part 6 . . . . 15
Points About Aerial Efficiency . . . . 24
SHORT-WAVE SECTION -
Short-Wave Review . . . . 18
Loggings of the Month . . . . 20
Stop Press . . . . 22
THE SERVICE PAGES -
Answers . . . . 26

##### 1942 10

CONTENTS:
CONSTRUCTIONAL -
Victory Mantel Model . . . . 5
TECHNICAL -
Forming the Amplifier Circle . . . . 7
Simple Hi-Fi Circuit . . . . 9
Carrier-Current Experiments . . . . 13
Radio Step by Step - Part 7 . . . . 17
Origin of the Oscillograph . . . . 19
SHORT-WAVE SECTION -
Short-Wave Review . . . . 20
New Stations . . . . 20
Loggings of the Month . . . . 22
SERVICE PAGES -
Answers . . . . 26

##### 1942 11

CONTENTS:
CONSTRUCTIONAL -
Super Quality Dual-Wave Design . . . . 7
TECHNICAL -
Little Known Industrial Equipment . . . . 5
The Weak Links in Reproduction . . . . 9
Handy Feedback System . . . . 11
Better Detection for the T.R.F. . . . . 13
Further Circuit Suggestions . . . . 14
Tolerances in Set Design . . . . 15
Radio Step by Step - Part 8 . . . . 18
SHORT-WAVE SECTION -
Short-wave Review . . . . 20
New Stations . . . . 21
Loggings of the Month . . . . 22
THE SERVICE PAGES -
Answers . . . . 26

##### 1942 12

CONTENTS:
CONSTRUCTIONAL -
Inter. Switch for Fidelity . . . . 5
TECHNICAL -
Interesting Ideas in Circuits . . . . 9
Added Range for Battery Sets . . . . 11
A Dictionary of Radio Terms . . . . 13
Radio in Development of Air Transport . . . . 17
Radio Step by Step - Part 9 . . . . 18
SHORT-WAVE SECTION -
Aussie News for U.S. Listeners . . . . 7
Short-Wave Review . . . . 20
New Stations . . . . 21
Loggings of the Month . . . . 22
THE SERVICE PAGES -
New Prices for Rola Speakers and Repairs . . . . 16
Answers . . . . 26

#### 1943
##### 1943 01

CONTENTS:
CONSTRUCTIONAL -
Standard 4-Watt Amplifier . . . . 5
TECHNICAL -
Interesting Ideas in Circuits . . . . 7
Modern Gramophone Pick-ups . . . . 9
Substitute Valve Arrangements . . . . 11
Evolution of the Detector . . . . 13
Another Quality Set Design . . . . 14
A Dictionary of Radio Terms . . . . 16
Radio Step by Step - Part 10 . . . . 20
The "Magneto" Spacelicker . . . . 23
SHORT-WAVE SECTION -
Short-Wave Review . . . . 21
New Stations . . . . 22
Loggings of the Month . . . . 24
THE SERVICE PAGES -
Answers . . . . 26

##### 1943 02

CONTENTS:
CONSTRUCTIONAL -
A De Luxe Signal Tracer . . . . 5
Power for the Battery Amplifier . . . . 9
S.W. Converter for Battery Sets . . . . 15
TECHNICAL -
Ideas in Circuits . . . . 11
Evolution of the Tuning Condenser . . . . 13
Substitute Valves - Part 2 . . . . 16
Radio Step · by Step - Part 11 . . . . 17
Resistor and Condenser Boxes . . . . 18
Selections of Crystals for Crystal Sets . . . . 19
SHORT-WAVE SECTION -
Co-Prosperity in Formosa and Korea . . . . 20
Short-Wave Review . . . . 21
New Stations . . . . 23
Loggings of the Month . . . . 24
THE SERVICE PAGES -
Answers . . . . 26

##### 1943 03

CONTENTS:
CONSTRUCTIONAL -
High Tension for Battery Sets . . . . 13
TECHNICAL -
Pentodes for Power ... But Triodes for Tone . . . . 6
Hints for Better Soldering . . . . 10
Evolution of the Loudspeaker . . . . 11
Radio Step by Step - Part 12 . . . . 17
Ideas for Modern Circuits . . . . 19
SHORTWAVE SECTION -
Shortwave Review . . . . 20
New Stations . . . . 22
Loggings of the Month . . . . 23
THE SERVICE PAGES -
Answers . . . . 26

##### 1943 04

CONTENTS:
CONSTRUCTIONAL -
The "S.R.L. Special" Amplifier . . . . 5
TECHNICAL -
Audio Frequency Coupling Methods . . . . 7
Ideas in Circuit Design . . . . 10
Gremlins Now Troubling Radio . . . . 12
Evolution of the Radio Valve . . . . 13
Are Deaf Aids Radio Business? . . . . 15
Can There be Radio to the Planets? . . . . 18
Radio Step by Step - Part 13 . . . . 19
SHORTWAVE SECTION -
Shortwave Review . . . . 20
New Stations . . . . 22
Loggings of the Month . . . . 23
THE SERVICE PAGES -
Answers . . . . 26

##### 1943 05

CONTENTS:
CONSTRUCTIONAL -
Novel Designs for Amplifier . . . . 5
Receiver Using Junk Parts . . . . 11
TECHNICAL -
Radio Frequency Coupling Methods . . . . 7
Television Tubes . . . . 9
Army Instruction "A La Yank!" . . . . 12
Ideas for Modern Circuits . . . . 13
Modified Views on Short-Wave Propagation . . . . 14
Evolution of the Tuning Coil . . . . 17
Radio Step by Step - Part 14 . . . . 18
SHORTWAVE SECTION -
Shortwave Review . . . . 20
New Stations . . . . 22
Allied and Neutral Countries Shortwave Schedule . . . . 22
THE SERVICE PAGES -
Answers . . . . 26

##### 1943 06

CONTENTS:
CONSTRUCTIONAL -
Simple Battery Set . . . . 9
TECHNICAL -
Electronics in Medicine . . . . 5
Ideas from Modern Circuits . . . . 11
Television or Facsimile . . . . 13
Substitute Output Valves . . . . 14
Radio Step by Step . . . . 20
SHORT-WAVE SECTION -
Short-wave Review . . . . 21
New Stations . . . . 21
Notes and Observations . . . . 22
Allied and Neutral Countries Short-wave Schedules . . . . 24
THE SERVICE PAGES -
Answers . . . . 26

##### 1943 07

CONTENTS:
CONSTRUCTIONAL -
Power Amplifier for Batteries . . . . 5
T.R.F. for Local Hi-Fi . . . . 7
Forty-Watt Amplifier . . . . 11
Battery Charger from Speaker Parts . . . . 13
Design for Transposed Aerials . . . . 15
TECHNICAL -
With Radiomen of the Air Force . . . . 6
Television . . . . 9
The Effects of Load Impedance . . . . 17
SHORT-WAVE SECTION -
Short-wave Review . . . . 21
Notes and Observations . . . . 22
New Stations . . . . 23
Allied and Neutral Countries Short-wave Schedules . . . . 24
THE SERVICE PAGES -
Answers . . . . 26

##### 1943 08

CONTENTS:
CONSTRUCTIONAL -
Design for 20-Watt Amplifier . . . . 5
Test Panel for Vibrator Testing . . . . 7
TECHNICAL -
Common Errors of Amplifier Practice . . . . 11
The Measurement of Resistance . . . . 15
Headphones for Quality Reproduction . . . . 17
Radio Step by Step . . . . 18
SHORTWAVE SECTION -
Shortwave Review . . . . 21
Notes and Observations . . . . 22
New Stations . . . . 23
Allied and Neutral Countries Shortwave Schedules . . . . 24
THE SERVICE PAGES -
Answers . . . . 26

##### 1943 09

CONTENTS:
CONSTRUCTIONAL -
Design for Post-War Receiver . . . . 9
Simple Wheatstone Bridge . . . . 15
Super Space-Licker Two . . . . 19
TECHNICAL -
Electronics in Medicine . . . . 5
Full Story of Inverse Feedback . . . . 10
The Story of the Electrolytic Condenser . . . . 17
Resistors - Resistance . . . . 18
SHORTWAVE SECTION -
Shortwave Review . . . . 20
Notes and Observations . . . . 21
New Stations . . . . 22
Allied and Neutral Countries Shortwave Schedules . . . . 23
THE SERVICE PAGES -
Answers . . . . 26

##### 1943 10

CONTENTS:
CONSTRUCTIONAL -
Design for a Simple A.C. Bridge . . . . 5
A Receiver Circuit for Utopia . . . . 9
Building a High-Grade Audio Transformer . . . . 15
TECHNICAL -
History of the Cathode Ray Oscilloscope . . . . 7
Revivals in Radio Practice . . . . 13
Servicing Suggestions for A.C.-D.C. Sets . . . . 18
SHORTWAVE SECTION -
Shortwave Review . . . . 20
Notes and Observations . . . . 21
Allied and Neutral Countries Shortwave Schedules . . . . 23
New Stations . . . . 25
THE SERVICE PAGES -
Answers . . . . 26

##### 1943 11

CONTENTS:
CONSTRUCTIONAL -
Receiver to Operate from 32-Volts . . . . 7
TECHNICAL -
Servicemen get Radio Parts Priority . . . . 5
Future Applications of Frequency Modulation . . . . 9
Design of Screening for Receivers . . . . 11
Are Multiple Valves a Good Proposition? . . . . 13
The Limits to Audio Amplification . . . . 15
The Construction and Amplification of Pick-ups . . . . 16
Speaker Location for High-Power Amplifiers . . . . 18
Common Errors of Radio Testing . . . . 19
SHORTWAVE SECTION -
Shortwave Review . . . . 20
Notes and Observations . . . . 21
New Stations . . . . 22
THE SERVICE PAGES -
Answers . . . . 26

##### 1943 12

CONTENTS:
CONSTRUCTIONAL -
Five-Way Tone Controls . . . . 9
New Design for Folded Horn . . . . 15
TECHNICAL -
Electronics in Industry . . . . 5
Operation of Output Valves . . . . 11
Guide to Back Numbers . . . . 13
High Efficiency Aerial for Shortwaves . . . . 17
Speaker Location for High-Powered Amplifiers . . . . 18
SHORTWAVE SECTION -
Shortwave Review . . . . 20
Notes and Observations . . . . 21
New Stations . . . . 22
THE SERVICE PAGES -
Answers . . . . 26

#### 1944
##### 1944 01

CONTENTS:
CONSTRUCTIONAL -
Simple Vacuum Tube Voltmeter . . . . 5
Hi-Fi Gramophone Pick-up . . . . 9
N.Z. All-Wave Two . . . . 13
Ribbon-Type Microphone . . . . 17
TECHNICAL -
Measurement of Inductance . . . . 7
Radio Nails for Plywood . . . . 14
Band Pass and Pre-selector Unit . . . . 15
Review of "Radio World" . . . . 19
SHORTWAVE SECTION -
Short-wave Review . . . . 20
Short-wave Notes and Observations . . . . 21
New Stations . . . . 20
Loggings of the Month . . . . 23
THE SERVICE PAGES -
Answers . . . . 26

##### 1944 02

CONTENTS:
CONSTRUCTIONAL -
What is the Most Suitable Circuit for Utility Receiver? . . . . 7
Make Your Own Soldering Iron . . . . 11
TECHNICAL -
The History of Piezo Crystals . . . . 5
The Case for the Single Ender . . . . 9
Some Thoughts on Post-War Radio . . . . 13
Super Quality Amplifier Design . . . . 15
Proper Operating Conditions for Valves . . . . 16
SHORTWAVE SECTION -
Shortwave Review . . . . 20
Shortwave Notes and Observations . . . . 21
New Stations . . . . 22
Loggings of the Month . . . . 23
THE SERVICE PAGES -
Answers . . . . 26

##### 1944 03

CONTENTS:
CONSTRUCTIONAL -
Design for Utility Circuit . . . . 6
The Three-Two Special . . . . 19
TECHNICAL -
What is the Future of Walkie-Talkie? . . . . 5
A Hundred Million Volts! . . . . 9
Radio in the Newspaper Headings . . . . 10
Electronics in Modern Music . . . . 11
Proper Methods of Using Valves . . . . 13
Technical Ideas from the Talkies . . . . 17
SHORTWAVE SECTION -
Shortwave Review . . . . 20
Shortwave Notes and Observations . . . . 21
New Stations . . . . 20
Loggings of the Month . . . . 23
THE SERVICE PAGES -
Answers . . . . 26

##### 1944 04

CONTENTS:
CONSTRUCTIONAL -
Standard Features for Utility . . . . 6
Avoiding the H.T. Transformer . . . . 7
Electronics in Modern Music . . . . 9
"Mystery" Crystal Set . . . . 17
TECHNICAL -
Ideals in DX Sets . . . . 5
Simple Volume Expander Circuit . . . . 11
Reviving Dry Batteries Electrically . . . . 13
Pentodes and Similar Power Valves . . . . 14
SHORTWAVE SECTION -
Shortwave Review . . . . 20
New Stations . . . . 20
Shortwave Notes and Observations . . . . 21
Loggings . . . . 23
THE SERVICE PAGES -
Answers . . . . 26

##### 1944 05

CONTENTS:
CONSTRUCTIONAL -
Novel Detector in Contest Entry . . . . 6
An Amplifier Beyond Reproach? . . . . 11
TECHNICAL -
The Tropic-Proofing Era . . . . 5
A Serviceman's Lament . . . . 7
The Multi-Vibrator and its Uses . . . . 9
Radio Aids to U.S. Navigation . . . . 12
Technical Data on Valve Cathodes . . . . 14
Radio Heating is a Modern Wonder . . . . 17
Wider Tone Control . . . . 18
Serviceman Licences Issued . . . . 19
SHORTWAVE SECTION -
Shortwave Review . . . . 20
New Stations . . . . 20
Shortwave Notes and Observations . . . . 21
Loggings . . . . 23
THE SERVICE PAGES -
Answers . . . . 26

##### 1944 06

CONTENTS:
CONSTRUCTIONAL -
Utility Battery-Operated Set . . . . 6
A Long-Range Utility Receiver . . . . 8
Direct-Coupled Utility Design . . . . 10
TECHNICAL -
Details of Victorian Amplifier Contest . . . . 5
Some New Ideas from Modern Circuits . . . . 11
Output Transformer Construction . . . . 13
Adjustable I.F. Selectivity . . . . 16
A.B.C. of Frequency Modulation . . . . 19
U.S. Claims Invention of Radar . . . . 20
Signal Officers in the Making . . . . 21
SHORTWAVE REVIEW -
Notes From My Diary . . . . 23
New Stations . . . . 23
Shortwave Notes and Observations . . . . 24
THE SERVICE PAGES -
Answers . . . . 26

##### 1944 07

CONTENTS:
CONSTRUCTIONAL -
Simple Vacuum Voltmeter . . . . 7
Home Built Communications Set . . . . 14
TECHNICAL -
R.A.A.F. Jungle Broadcaster . . . . 5
Winning Essay . . . . 8
Design Considerations for Amplifiers . . . . 10
Finer Points About Pick-ups . . . . 19
Distortion - Its Cause and Cure . . . . 20
SHORTWAVE REVIEW -
Notes From My Diary . . . . 23
New Stations . . . . 23
Short Wave Notes and Observations . . . . 24
THE SERVICE PAGES -
Answers . . . . 26

##### 1944 08

CONTENTS:
CONSTRUCTIONAL -
Home-Made Hi-Fi Pick-up . . . . 5
Wide Range Audio Frequency Oscillator . . . . 7
A Useful A.C. Bridge Circuit . . . . 13
V.T. Voltmeter for Audio Work . . . . 18
TECHNICAL -
The Accuracy of Ohmmeters . . . . 9
Screening by Metal Spray . . . . 11
Frequency-Controlling Crystals . . . . 17
Bass Booster for Amplifiers . . . . 19
SHORTWAVE REVIEW -
Notes From My Diary . . . . 20
New Stations . . . . 20
Shortwave Notes and Observations . . . . 21
Shortwave Schedules . . . . 24
THE SERVICE PAGES -
Answers . . . . 26

##### 1944 09

CONTENTS:
CONSTRUCTIONAL -
The "Ferrier" Super Crystal Receiver . . . . 10
A Non-Microphonic Volume-Expander Circuit . . . . 13
Simple and Effective Valve Tester . . . . 15
TECHNICAL -
N.Z. Radiomen to go to Britain . . . . 5
The Design of Direct-Coupled Amplifiers . . . . 6
Eclipse Staff Holds Amplifier Contest . . . . 11
A Buzzer Makes an Handy Multivibrator . . . . 12
Radio Frequency for Industrial Heating . . . . 16
SHORTWAVE REVIEW -
Notes From My Diary . . . . 23
New Stations . . . . 23
Shortwave Notes and Observations . . . . 24
THE SERVICE PAGES -
Answers . . . . 26

##### 1944 10

CONTENTS:
CONSTRUCTIONAL -
Something Fresh in Amplifiers . . . . 5
"Novochord" is Electronic Piano . . . . 7
Pick-Up Principles and Practice . . . . 13
Cathode-Follower Amplifier Design . . . . 16
Inductance and Capacity Meter . . . . 17
TECHNICAL -
Cathode Follower Output Stage . . . . 11
Iconoscope - The Electron "Gun" . . . . 21
SHORTWAVE REVIEW -
Notes of My Diary . . . . 23
Shortwave Notes and Observations . . . . 24
New Stations . . . . 24
THE SERVICE PAGES -
Answers . . . . 26

##### 1944 11

CONTENTS:
CONSTRUCTIONAL -
Repairing and Adjusting Vibrators . . . . 22
A Receiver Without Gang . . . . 23
Alignment by Wobbler . . . . 9
Pick-up Principles and Practice . . . . 11
TECHNICAL -
Mutton Good at Amplifiers . . . . 5
Possibilities of Frequency Modulation . . . . 7
Curves - Straight or Bent . . . . 13
Valves in Theory and Practice . . . . 16
Research Into Phase-Changers . . . . 21
The Future for Recordings . . . . 24
SHORTWAVE REVIEW -
Notes from My Diary . . . . 27
New Stations . . . . 27
Shortwave Notes and Observations . . . . 28
Loggings . . . . 31
THE SERVICE PAGES -
Answers . . . . 33

##### 1944 12

CONTENTS:
CONSTRUCTIONAL -
Contest Was Keen . . . . 5
Pick-up Principles . . . . 13
Victorian Championship . . . . 17
TECHNICAL -
Aesthetics of Reproduction . . . . 19
Music While You Work . . . . 26
SHORTWAVE REVIEW -
Shortwave Notes and Observations . . . . 29
Notes From My Diary . . . . 31
New Stations . . . . 33
THE SERVICE PAGES -
Answers . . . . 34

#### 1945
##### 1945 01

CONTENTS
CONSTRUCTIONAL —
Power Transformers . . . . 5
TECHNICAL —
Tales of Phase Inverters . . . . 11
In Defence of "A504" . . . . 13
The Telechrome . . . . 17
Factors in High Fidelity . . . . 19
Acoustic Typewriters . . . . 25
SHORTWAVE REVIEW —
The Month's Loggings . . . . 29
Notes From My Diary . . . . 32
New Stations . . . . 31
THE SERVICE PAGES —
Answers . . . . 34

##### 1945 02

CONTENTS
CONSTRUCTIONAL —
An Alternating Design . . . . 5
Make Your Own Selenium Cell . . . . 17
TECHNICAL —
Square Wave Testing . . . . 11
Aesthetics of Reproduction . . . . 14
Filing Your Resistances . . . . 15
A Short Course in Radio Fundamentals . . . . 20
Voltage Doubling . . . . 25
The Miller Effect . . . . 27
SHORTWAVE REVIEW —
Notes From My Diary . . . . 30
New Stations . . . . 31
Loggings . . . . 32
THE SERVICE PAGES —
Answers . . . . 34

##### 1945 03

CONTENTS
CONSTRUCTIONAL —
A Circuit of D.C. Power . . . . 5
Reflex for Results . . . . 11
A Handy Tester Design . . . . 13
TECHNICAL —
Practical Aspects of High Fidelity . . . . 6
A Short Course in Radio Fundamentals — Part 2 . . . . 14
The Amplifier Competition . . . . 18
Cathode Ray Tubes . . . . 19
Moving Coil Meters . . . . 25
Post-War Receiver Features . . . . 29
SHORTWAVE REVIEW —
Notes From My Diary . . . . 30
New Stations . . . . 31
Loggings . . . . 32
The Service Pages —
The Service Pages . . . . 34

##### 1945 04

CONTENTS
CONSTRUCTIONAL —
Balanced Linear V.T.V.M. . . . . 5
TECHNICAL —
Continental Design . . . . 11
Contrast Without Distortion . . . . 15
Aegis Components Do War Job . . . . 17
A Short Course In Radio Fundamentals - Part 3 . . . . 18
Technical Review from U.S.A. . . . . 25
Production of Audio Frequencies . .. . . . . .. .. . 27
SHORTWAVE REVIEW —
Notes From My Diary . . . . 30
New Stations . . . . 31
Loggings . . . . 32
The Service Pages —
The Service Pages . . . . 34

##### 1945 05

CONTENTS
CONSTRUCTIONAL —
An Improved Reflex Circuit . . . . 7
One-valve Test Oscillator . . . . 9
A Sound Design for an Audio Oscillator . . . . 13
TECHNICAL —
Tolerance in Set Design . . . . 5
A High-Fidelity Hint . . . . 11
Building the A.I.F. Broadcaster . . . . 12
A Short Course in Radio Fundamentals — Part 4 . . . . 16
New Dutch Valves . . . . 22
SHORTWAVE REVIEW —
Notes From My Diary . . . . 23
New Stations . . . . 24
Loggings and Changes . . . . 25
THE SERVICE PAGES —
The Service Pages . . . . 26

##### 1945 06

CONTENTS
CONSTRUCTIONAL —
A Well-tried Reflex Circuit . . . . 20
TECHNICAL —
Radio Location - War-winner . . . . 5
Walkie-Talkies in Peace . . . . 11
Wireless Rules the Waves . . . . 13
A Short Course in Radio Fundamentals - Part 5 . . . . 16
Fragmentary Crystals . . . . 19
History and Theory of Microphones . . . . 21
Another Hint for High Fidelity . . . . 24
Latest Technical Notes from New York . . . . 25
SHORTWAVE REVIEW —
Notes From My Diary . . . . 26
New Stations . . . . 27
Loggings . . . . 28
THE SERVICE PAGES —
Answers . . . . 30

##### 1945 07

CONTENTS
CONSTRUCTIONAL —
Wide Range Resistance and Capacity Meter . . . . 9
Tone Compensation Amplifier . . . . 20
TECHNICAL —
Radio in America . . . . 5
Theory of Oscillation . . . . 17
Power Supply Filters . . . . 24
Straede's Amplifier Contest . . . . 24
A Short Course in Radio Fundamentals . . . . 26
Latest Technical Notes from New York . . . . 29
SHORTWAVE REVIEW —
Notes From My Diary . . . . 30
New Stations . . . . 31
Loggings . . . . 32
THE SERVICE PAGES —
The Service Pages . . . . 34

##### 1945 08

CONTENTS
CONSTRUCTIONAL —
Making Paper Condensers . . . . 11
Small Hints for Big Effects . . . . 15
TECHNICAL —
Radio for Model Planes . . . . 5
Eliminating Hum . . . . 6
Trade With America . . . . 7
A Short Course in Radio Fundamentals . . . . 18
Decibel — a Logarithmic Function . . . . 22
The Theory Behind Proper Amplifier Design . . . . 26
SHORTWAVE REVIEW —
Notes From My Diary . . . . 30
New Stations . . . . 32
Loggings . . . . 32
THE SERVICE PAGES —
The Service Pages . . . . 34

##### 1945 09

CONTENTS
CONSTRUCTIONAL —
A Camera Case Portable . . . . 15
Getting the Best from a Pick-up . . . . 17
TECHNICAL —
An Answer to the Cathode Follower . . . . 11
Theory Behind Proper Amplifier Design — Part 2 . . . . 18
Probe Adapter for the V.T.V.M. . . . . 24
Future Appreciations of Radio . . . . 28
Starting in the Radio Business . . . . 5
Standard Valve Types for 1945 . . . . 7
Victorian Amplifier Contest . . . . 7
SHORTWAVE REVIEW —
Notes from My Diary . . . . 30
New Stations . . . . 31
Loggings . . . . 32
THE SERVICE PAGES —
The Service Pages . . . . 34

##### 1945 10

CONTENTS
TECHNICAL —
Our Future Policy . . . . 5
Honour Roll . . . . 7
Amateur Radio . . . . 9
The Transitron Oscillator . . . . 11
Vibrating Power Supplies . . . . 17
Radar's Work With the Navy . . . . 21
The Theory Behind Proper Amplifier Design . . . . 24
SHORTWAVE SECTION —
Notes From My Diary . . . . 30
The Month's Loggings . . . . 32
New Stations . . . . 33
THE SERVICE PAGES —
The Service Pages . . . . 34

##### 1945 11

CONTENTS
CONSTRUCTIONAL —
Stereophonic Amplifier . . . . 7
An Electric Filter . . . . 11
"Aegis" Little Companion Mantel Model . . . . 15
TECHNICAL —
Victorian Amplifier Contest . . . . 5
Television on Rental Basis . . . . 26
Ham Notes — Calling CQ! . . . . 27
SHORTWAVE REVIEW —
Notes From My Diary . . . . 30
New Stations . . . . 32
THE SERVICE PAGES —
Answers . . . . 34

##### 1945 12

CONTENTS
CONSTRUCTIONAL —
The "Lamb" Noise Suppressor . . . . 17
TECHNICAL —
Electro Dynamics Are Obsolete . . . . 5
The Hammond Electric Organ . . . . 6
Hints About Using A.V.C. . . . . 11
Mutton the Winner . . . . 15
Panoramic Reception . . . . 27
Ham Notes — Calling CQ . . . . 27
SHORTWAVE REVIEW —
Notes from My Diary . . . . 30
New Stations . . . . 31
THE SERVICE PAGES —
Answers . . . . 34

#### 1946
##### 1946 01

CONSTRUCTIONAL —
The Champion Amplifier . . . . 5
Simple Service Oscillator . . . . 7
Home Made Filter Chokes . . . . 17
TECHNICAL —
Cathode Follower Tests . . . . 13
Trends in Set Design . . . . 21
U.S. Radio Newsletter . . . . 22
Principles of Radar . . . . 23
Duplex Speakers for Fidelity . . . . 25
Ham Notes — Calling CQ . . . . 27
SHORTWAVE REVIEW —
Notes From My Diary . . . . 30
New Stations . . . . 33
THE SERVICE PAGES —
Answers . . . . 34

##### 1946 02

CONSTRUCTIONAL —
Circuits — The Sober way . . . . 7
Improving DX Performance . . . . 13
TECHNICAL —
New "Ham" Technique . . . . 5
"Wireless Set Number Ten" . . . . 14
Signal Tracer in Miniature . . . . 15
How Radio Signals are Broadcast . . . . 17
The Growth of the Radar Chain . . . . 23
Ham Notes — Calling CQ . . . . 27
SHORTWAVE REVIEW —
Notes From My Diary . . . . 31
New Stations . . . . 32
THE SERVICE PAGES —
Answers . . . . 34

##### 1946 03

CONSTRUCTIONAL —
The "VK2NO — V6" . . . . 5
TECHNICAL —
Using the "1852" . . . . 13
1852 Characteristics . . . . 14
Using Available Gangs . . . . 19
New Permag Speakers . . . . 23
Radio Trade Notes . . . . 25
Ham Notes — Calling CQ . . . . 27
SHORTWAVE REVIEW —
Notes From My Diary . . . . 31
New Stations . . . . 32
THE SERVICE PAGES —
Answers . . . . 34

##### 1946 04

CONSTRUCTIONAL —
50-Watt Phone Transmitter . . . . 19
TECHNICAL —
Efficient Aerials for VHF . . . . 5
Improved Modulation Oscillator . . . . 7
Long Range Two Valver . . . . 9
Polysterene for Amateurs . . . . 11
My Own . . . . 15
The Proximity Radio Fuse . . . . 17
Crystals Will Not Amplify . . . . 21
30-Watt Modulation for Hams . . . . 23
Dismal Future for Radio Trade . . . . 25
Ham Notes . . . . 27
SHORTWAVE REVIEW —
Notes From My Diary . . . . 31
New Stations . . . . 32
THE SERVICE PAGES —
Answers . . . . 34

##### 1946 05

CONSTRUCTIONAL —
Metropolis Four . . . . 23
The "Ferrotune" Superheterodyne . . . . 37
TECHNICAL —
What of the Future of "Ham Radio"? . . . . 5
Simple Impedance Measurements . . . . 9
The Channel Analyser . . . . 15
Loud Speaker Baffling Systems . . . . 31
A Decade of Good Battery Circuits . . . . 34
Reception Experiments . . . . 40
Ham Notes . . . . 41
PERSONAL —
Pages . . . . 5, 7, 11, 17, 20, 21, 33, 49
SHORTWAVE REVIEW —
Notes From My Diary . . . . 45
New Stations . . . . 46
Loggings . . . . 47
THE SERVICE PAGES —
Answers . . . . 50

##### 1946 06

CONSTRUCTIONAL —
Receiving Beam for "Ten" . . . . 7
TECHNICAL —
Post-war American Receiver . . . . 5
Improved Signal Tracer . . . . 6
Exciter Unit for 50 Mc. . . . . 11
Remarkable Possibilities in 2 Mc. I.F. . . . . 15
Do You Want to be a Ham? . . . . 18
Is That Your Bid? . . . . 20
Understand Valve Curves . . . . 21
More About the Hammond Organ . . . . 28
Experiences with Noise Suppression . . . . 29
Ham Notes . . . . 31
SHORTWAVE REVIEW —
Notes From My Diary . . . . 38
Shortwave Stations of the World . . . . 38
THE SERVICE PAGES —
Answers . . . . 42

##### 1946 07

CONSTRUCTIONAL —
The Latest in Direct Coupling . . . . 7
"The Spotter" . . . . 11
Powerful 8-Valve Circuit . . . . 17
An Ideal Single-Ender . . . . 21
TECHNICAL —
Advantages of Ferrotune . . . . 5
Politics of Ham Radio . . . . 15
Servicing A.C. Receivers . . . . 20
Estimating Receiver Performance . . . . 23
Operating the 807 . . . . 27
Ham Notes . . . . 31
SHORTWAVE REVIEW —
Notes From My Diary . . . . 38
Shortwave Stations of the World . . . . 39
THE SERVICE PAGES —
Answers . . . . 42

##### 1946 08

CONSTRUCTIONAL —
A Handy Multi-Meter Kit . . . . 7
"All-Wave" Band Spread Two . . . . 13
The "Ferrotune" Reinartz . . . . 17
Sky-Cruiser Battery Four . . . . 21
The Fidelity Broadcast . . . . 25
TECHNICAL —
Outlook for "Ham" Market . . . . 5
Make Your Own "Stroboscope" . . . . 15
Getting Started at Set-Building . . . . 29
Ham Notes - Calling CQ . . . . 31
SHORTWAVE REVIEW —
Notes From My Diary . . . . 38
New Stations . . . . 39
THE SERVICE PAGES —
Answers . . . . 42

##### 1946 09

CONSTRUCTIONAL —
A Band Checker . . . . 5
A Regenerative Pre-Selector Unit . . . . 9
The "Sky-Hawk Four" . . . . 29
TECHNICAL —
A Effective Noise Limiter . . . . 11
More About Ham Politics . . . . 13
Getting Started at Set Building (Part 2) . . . . 15
The Connoisseur . . . . 19
The Importance of Lay Out . . . . 27
Fault Finding by Substitutions . . . . 28
Ham Notes . . . . 31
SHORTWAVE REVIEW —
Notes From My Diary . . . . 38
Shortwave Stations of the World . . . . 40
THE SERVICE PAGES —
Speedy Queries . . . . 42

##### 1946 10

CONSTRUCTIONAL —
A Practical Circuit . . . . 7
An A.C. Bridge . . . . 21
TECHNICAL —
"Sparks" as a Career . . . . 5
Technical Notes From Up North . . . . 11
Problems of Commercial Design . . . . 15
Dealing With Man-Made Static . . . . 25
Ham Papers . . . . 29
Calling CQ . . . . 31
Doings on "One-and-Threequarters" . . . . 33
DX Possible on "Six" . . . . 34
Bargains - and Where Encountered . . . . 35
Around the Six Metre Band . . . . 36
Night Flying in Daylight . . . . 37
SHORTWAVE REYIEW —
Notes From My Diary . . . . 38
Shortwave Stations of the World . . . . 39
THE SERVICE PAGES —
Answers . . . . 42

##### 1946 11

CONSTRUCTIONAL —
"Ferrotune" Mantel Model . . . . 15
TECHNICAL —
A Really Good Amplifier . . . . 5
More Restrictions for Amateurs . . . . 7
A New Home for "Radio World" . . . . 9
Circuit for A.C. or Battery . . . . 11
Technical Radio in S. America . . . . 13
A Full Frequency Range Amplifier . . . . 18
To Deliver Forty Five Watts . . . . 19
Some Notes on the Care of Batteries . . . . 28
Calling CQ . . . . 31
SHORTWAVE REVIEW —
Notes for My Diary . . . . 38
Shortwave Schedules . . . . 40
THE SERVICE PAGES —
Answers . . . . 42

##### 1946 12

CONSTRUCTIONAL —
High Quality Multimeter . . . . 5
Build Yourself an F.F.R. Amplifier . . . . 15
TECHNICAL —
Cracking the Oyster . . . . 11
Radiotron Applications Laboratory . . . . 26
Calling CQ . . . . 27
SHORTWAVE REVIEW —
Notes From My Diary . . . . 31
THE SERVICE PAGES —
Answers . . . . 34

#### 1947
##### 1947 01

CONTENTS
TECHNICAL —
Designing Battery Receivers . . . . 5
The Control of Tone . . . . 13
The Choice of I.F. Frequencies . . . . 19
Calling CQ . . . . 21
Further Restrictions for Hams . . . . 11
Australian Broadcasting Stations . . . . 26
SHORTWAVE REVIEW —
Notes from My Dairy . . . . 30
THE SERVICE PAGES —
Answers . . . . 34

##### 1947 02

CONTENTS
TECHNICAL —
Trends in Design . . . . 5
High-Fidelity Pick-ups from England . . . . 9
The "F.F.R." 45-watt Amplifier . . . . 15
Two more "Connoisseur" Sets . . . . 21
Re-vamping the "F.S.6" . . . . 27
Calling CQ . . . . 33
SHORTWAVE REVIEW —
Notes from My Diary . . . . 38
THE SERVICE PAGES —
Answers . . . . 42

##### 1947 03

CONTENTS
TECHNICAL —
Another Type of Beam Array . . . . 5
Electric-Acoustic Coupling . . . . 7
Quick Systematic Testing . . . . 13
Sensitive Four-Valve Circuit . . . . 17
Radio Frequency Chokes . . . . 27
The Truth About Television . . . . 30
SHORTWAVE REVIEW —
Notes from My Diary . . . . 38
THE SERVICE PAGES —
Answers . . . . 42

##### 1947 04

CONTENTS
TECHNICAL —
Medical and Biological . . . . 7
Trends in Pick-up Developments . . . . 13
Easy Reflex Circuits . . . . 14
Visual Tuning Indicators . . . . 17
Printed Wiring Methods . . . . 29
A Relay from an old A.F. Transformer . . . . 31
SHORTWAVE REVIEW —
Notes From My Diary . . . . 38
THE SERVICE PAGES —
Answers . . . . 42

##### 1947 05

CONTENTS
TECHNICAL —
Problems of Trade Discount . . . . 5
Double Superhet for Ham Use . . . . 9
Preamplifiers for Talkie Work . . . . 11
Starting a Radio Business . . . . 13
Visual Tuning Indicators . . . . 16
Photo-Electric Cells . . . . 24
Disposal Bargains — And Otherwise . . . . 26
Service Problems in U.S.A. . . . . 30
SHORTWAVE REVIEW —
Notes From My Diary . . . . 38
THE SERVICE PAGES —
Answers . . . . 42

##### 1947 06

CONTENTS
TECHNICAL —
The "Six-Ten" . . . . 5
Unusual Condensers . . . . 13
Can You Answer These? . . . . 15
Car Radio . . . . 17
The "Voyager" . . . . 19
Teleconda 3 . . . . 27
Pepping up No. 4 Set . . . . 31
SHORTWAVE REVIEW —
Notes From My Diary . . . . 38
THE SERVICE PAGES —
Answers . . . . 42

##### 1947 07

CONTENTS
TECHNICAL —
Natural Reproduction . . . . 5
Wave Traps . . . . 11
Great Circle Gadget . . . . 13
Grounded-Grid R.F. Stages . . . . 15
The "F.S.L." — Plus . . . . 18
Caravan Radio . . . . 20
"Little Wonder Two" . . . . 24
"Europa 5" . . . . 26
Technical Topics . . . . 29
SHORTWAVE REVIEW —
Notes From My Diary . . . . 38
THE SERVICE PAGES —
Answers . . . . 42

##### 1947 08

CONTENTS
CONSTRUCTIONAL —
"High Quality Six" . . . . 9
"Q-Plus" . . . . 17
TECHNICAL —
Ham Radio at Sea . . . . 5
Bias for Battery Sets . . . . 7
English Quality Amplifier . . . . 13
Radio on H.M.S. "Vanguard" . . . . 21
Radio Reflections from Shooting Stars . . . . 24
Plastics to Revolutionise Television . . . . 26
International DX Contest . . . . 28
SHORTWAVE REVIEW —
Notes From My Diary . . . . 38
THE SERVICE PAGES —
Answers . . . . 42

##### 1947 09

CONTENTS
CONSTRUCTIONAL —
Signal Tracer for Service . . . . 7
Build Your Own Oscillator . . . . 9
TECHNICAL —
Anisotropic Alnico . . . . 17
Beams, Beams, Beautiful Beams . . . . 21
The Kingsley "K.S.9'er" . . . . 23
A Review of Ferrotune . . . . 25
Ideal Broadcast Station Console . . . . 32
Among Our Readers . . . . 34
Calling CQ . . . . 41
SHORTWAVE REVIEW —
Notes From My Diary . . . . 46
THE SERVICE PAGES —
Answers . . . . 50

##### 1947 10

CONTENTS
CONSTRUCTIONAL —
"Snug 5" . . . . 5
TECHNICAL —
Kingsley Equipment for U.H.F. . . . . 11
Adjusting the Dipole . . . . 27
"Rural 4" . . . . 15
Servicing by Signal Tracer . . . . 29
Calling "C.Q." . . . . 33
SHORTWAVE REVIEW —
Notes From My Diary . . . . 38
THE SERVICE PAGES —
Answers . . . . 42

##### 1947 11

CONTENTS
CONSTRUCTIONAL —
"Sally" . . . . 5
TECHNICAL —
A Record on Six Metres . . . . 9
Signal Tracer . . . . 11
High-Fidelity Transformers . . . . 17
Highlights of Radiolympia . . . . 19
A New Method of Tuning . . . . 23
"Transmitter, FS6 Plus" . . . . 29
Among Our Readers . . . . 33
Calling CQ . . . . 41
SHORTWAVE REVIEW —
Notes From My Diary . . . . 46
THE SERVICE PAGES —
Answers . . . . 50

##### 1947 12

CONTENTS
TECHNICAL —
Electronics in Meteorology . . . . 5
Experiment in De-centralisation . . . . 7
Better Interstate Reception . . . . 9
Theatre Sound Equipment . . . . 13
Latest American Technique . . . . 15
Among Our Readers . . . . 17
Walkie-Talkie . . . . 18
Amateur Personalities . . . . 21
Antenna Tips for the New Hand . . . . 23
Networks — and "Rag-Chew" Clubs . . . . 26
Calling CQ! . . . . 31
SHORTWAVE REVIEW —
Notes From My Diary . . . . 38
THE SERVICE PAGES —
Speedy Query Service . . . . 42

#### 1948
##### 1948 01

CONTENTS
TECHNICAL —
Splendid Contest . . . . 5
The Champion Amplifier . . . . 7
Amateur Personalities . . . . 14
Convert to High Fidelity . . . . 18
"Mantelette Three" . . . . 20
Operation Annie . . . . 22
Recent Valve Developments . . . . 29
Among Our Readers . . . . 31
Performance with Economy . . . . 35
Ham Notes . . . . 39
SHORTWAVE REVIEW —
Notes From My Diary . . . . 46
THE SERVICE PAGES —
Speedy Query Service . . . . 50

##### 1948 02

CONTENTS
TECHNICAL —
Stir in Hi-Fi Circles . . . . 5
Walkie-Talkie . . . . 9
High Fidelity From Crystal Pickups . . . . 15
Hints and Tips . . . . 18
Home-Wound Power Transformers . . . . 19
Converters for "Six" and "Ten" . . . . 24
Wanted — An Inventor . . . . 27
The "Teleconda" Powerport . . . . 31
Ham Notes . . . . 35
SHORTWAVE REVIEW —
Notes From My Diary . . . . 38
THE SERVICE PAGES —
Speedy Query Service . . . . 42

##### 1948 03

CONTENTS
TECHNICAL —
In Search of Fidelity . . . . 5
A Modern Battery Receiver . . . . 9
Radio World Review . . . . 11
Among Our Readers . . . . 15
A Personal Portable . . . . 19
3-Valve Triple-Wave Receiver . . . . 27
Calling CQ . . . . 34
SHORTWAVE REVIEW —
Notes From My Diary . . . . 38
THE SERVICE PAGES —
Speedy Query Service . . . . 42

##### 1948 04

CONTENTS
TECHNICAL —
ZAAYER Crosses Atlantic on "Six" . . . . 5
The L.s.d. of High Fidelity . . . . 7
Amateur Personalities . . . . 13
Narrow-Band F.M. Adaptor . . . . 15
A Direct Coupled Circuit . . . . 17
T.R.F. Mantel Four . . . . 18
Speaker Impedance Matching . . . . 20
Permags Here to Stay . . . . 28
Circuit for an F.M. Receiver . . . . 29
Among Our Readers . . . . 31
Calling C.Q. . . . . 35
SHORTWAVE REVIEW —
Notes From My Diary . . . . 39
THE SERVICE PAGES —
Speedy Query Service . . . . 42

##### 1948 05

CONTENTS
TECHNICAL —
Limelight on Quality . . . . 5
A Home-made Hi-Fi Pick-up . . . . 9
Sad Lack of Technical Development . . . . 13
Protective Circuits . . . . 16
Deaf Aids From Health Clinics . . . . 19
An English Three-Element Beam . . . . 21
Germanium Crystals . . . . 23
Well-tested Battery Receiver . . . . 25
Among Our Readers . . . . 28
Effective Static Reduction . . . . 29
The "VK2NO" Ribbon Beam . . . . 32
Calling CQ . . . . 35
SHORTWAVE REVIEW —
Notes From My Diary . . . . 39
THE SERVICE PAGES —
Speedy Query Service . . . . 42

##### 1948 06

CONTENTS
TECHNICAL —
Fidelity Tuner With A.V.C. . . . . 5
Interesting Pre-Amplifier . . . . 8
Well-Tested Inter-Com. System . . . . 11
Oscillator for Code Speed . . . . 13
Communications Coil Assembly . . . . 17
The "Economy Three" . . . . 19
Service By Substitution . . . . 24
SHORTWAVE REVIEW —
Calling CQ . . . . 35
Notes From My Diary . . . . 39
THE SERVICE PAGES —
Speedy Query Service . . . . 42

##### 1948 07

CONTENTS
TECHNICAL —
Building Box Baffles . . . . 5
Using H.F. Pentodes . . . . 9
Pre-Amplifier Tone Control . . . . 11
12-Valve Communications Receiver . . . . 13
Signal-Strength Meters . . . . 17
Among Our Readers . . . . 21
A Four-Valve Battery Portable . . . . 23
Calling CQ . . . . 27
Amateur Transmitting Licences . . . . 29
SHORTWAVE REVIEW —
Notes From My Diary . . . . 31
THE SERVICE PAGES —
Speedy Query Service . . . . 34

##### 1948 08

CONTENTS
TECHNICAL —
Converter For Amateur Bands . . . . 5
History of "1933 Standard" . . . . 9
"The Bedside 5" . . . . 13
Loudspeaker Baffling . . . . 17
The American Radio Industry . . . . 19
Exceptional 20 Watt Amplifier . . . . 21
"Long Shot" Economy Beam . . . . 23
Calling CQ! . . . . 27
SHORTWAVE REVIEW —
Notes From My Diary . . . . 31
THE SERVICE PAGES —
Speedy Query Service . . . . 34

##### 1948 09

CONTENTS
F.M. — Minus Boloney . . . . 5
Starting Off In Radio . . . . 9
New Broadcast Wavelengths . . . . 15
Buyers' Guide . . . . 25
Students' One-Valve Experimental Set . . . . 39
Calling CQ . . . . 47
How To Become a "Ham" . . . . 49
The Morse Code . . . . 50
International Amateur Prefixes . . . . 52
The "Q" Code . . . . 53
Index to Volume 12 . . . . 54
Short-Wave Review . . . . 55
Bargain Corner . . . . 58

##### 1948 10

CONTENTS
Teleconda 4841 . . . . 5
The Vibrator . . . . 13
Extension Speaker . . . . 23
Multi Channel Tracer . . . . 27
Problems With Battery Sets . . . . 29
Among Our Readers . . . . 31
Frequency Range . . . . 33
Calling C.Q. . . . . 43
A Converter For 50 Mc. . . . . 45
Shortwave Review . . . . 47
Speedy Query Service . . . . 50

##### 1948 11

CONTENTS
De-Luxe Amateur Receiver . . . . 5
Equipment Valves For 1949 . . . . 9
The Man Before Marconi . . . . 11
Junior Feedback Amplifier . . . . 15
Home-Made Hi-Fi Pick-Ups . . . . 17
A Personal Radio Set . . . . 19
The "Q-Plus" Coils . . . . 22
Resistor Faults . . . . 25
R.C.S. Coils Submerged . . . . 29
Tuning Range For Receivers . . . . 30
Among Our Readers . . . . 31
Calling C.Q. . . . . 35
Shortwave Review . . . . 39
Speedy Query Service . . . . 42

##### 1948 12

CONTENTS
Car-Lectric . . . . 5
Dials and Cabinets . . . . 15
Infinite Impedance Detector . . . . 20
Communications Receivers . . . . 21
Home Recording Hints . . . . 25
Progress In British Radio . . . . 27
Mullard Receivers . . . . 29
Notes From My Diary . . . . 31
Speedy Query Service . . . . 34

#### 1949
##### 1949 01

CONTENTS
An Electronic Alarm . . . . 5
Handy P.A. Amplifier . . . . 7
World Standard . . . . 13
A Challenge . . . . 16
Differential Condensers . . . . 17
"New Look" Selectivity . . . . 21
10/15 Converter . . . . 25
Standard Power Unit . . . . 29
Photo-Flash Experiments . . . . 31
New Set Designs . . . . 35
Speedy Query Service . . . . 42

##### 1949 02

CONTENTS
Radio in the News . . . . 5
New Type of Fidelity Pick-up . . . . 6
More About the Standard . . . . 7
New Rola Speaker . . . . 10
Simple Galvanometers . . . . 11
Among Our Readers . . . . 14
Direct-Coupled 807 . . . . 15
Service Oscillator . . . . 17
English Coil Box . . . . 19
British Television Exports . . . . 20
New Brand of Transformers . . . . 21
Medium-Fi . . . . 23
Key to the VT Valve Types . . . . 26
Shortwave Review . . . . 31
Speedy Query Service . . . . 34

##### 1949 03

CONTENTS
Midway Portable . . . . 5
Improved 807 Amplifier . . . . 9
Car Radio Installation . . . . 11
A.C. Power from Batteries . . . . 13
Answers in Full . . . . 15
Radio Control for Models . . . . 20
Phase Splitting Designs . . . . 21
Reproduction of Speech . . . . 29
Among Our Readers . . . . 41
New Angle on Direct Coupling . . . . 43
Good Gramo. Motor . . . . 45
Shortwave Review . . . . 47
Speedy Query Service . . . . 50

##### 1949 04

CONTENTS
Measuring A.C. Current . . . . 5
New Style Direct Coupling . . . . 7
A Simple Multi-Meter . . . . 9
Are Component Prices Unreasonable? . . . . 13
Time Is Money . . . . 16
Cathode Coupling, Again . . . . 17
How To Read Circuit Schematics . . . . 19
Photo-flash Outfit . . . . 22
A Wide-range Bridge . . . . 23
Among Our Readers . . . . 24
Simple Mantel Model . . . . 26
Introduction to "Ham-gen" . . . . 27
Receiver Aerial Matching . . . . 28
T.R.F. Ham Receiver . . . . 31
Converting That Prop Motor . . . . 37

##### 1949 05

CONTENTS
Heterodyne Frequency Meter . . . . 5
Third Dimensional Amplifier . . . . 9
Multi-Vibrator . . . . 11
The Car-Lectric — Mk. III . . . . 13
How to Read Circuits . . . . 19
Magnets and Magnetism . . . . 23
Factory-Made Set Design . . . . 29
Voltage Regulation . . . . 31
Sell Speakers . . . . 37
New Brand of Coil Units . . . . 38
Short Wave Review . . . . 39
Speedy Query Service . . . . 50

##### 1949 06

CONTENTS
An Electronic Stroboscope . . . . 5
Television in Europe . . . . 7
The "Vega" Dual-Wave Five . . . . 9
Latest English Developments . . . . 13
More About Direct Couplers . . . . 15
Efficient Chassis Layout . . . . 17
The Up and Down Receiver . . . . 25
Index to Volume 13 . . . . 26
Analysis of Receiver Noise . . . . 27
Voltage Regulation . . . . 29
Search for Elusive Hi-Fi . . . . 33
List of Instruction Manuals . . . . 37
Odd Resistor Values . . . . 38
Short Wave Review . . . . 39
Speedy Query Service . . . . 42

##### 1949 07-08

CONTENTS
British Television Equipment . . . . 5
Signal Tracer with Oomph! . . . . 9
Latest Radiolette Model . . . . 13
Grid-Dip Wavemeter . . . . 17
Small Sets for Short-waves . . . . 19
Fluo Tube Light Unit . . . . 22
Post-war Organs . . . . 23
Direct Currents . . . . 27
Free Technical Data Offers . . . . 32
A Simple Meg-Meter . . . . 33
How to Wind Honeycombs . . . . 35
Short-wave Review . . . . 37
New International Call Signs . . . . 41
Speedy Query Service . . . . 42

##### 1949 09

CONTENTS
Universal Speaker Input Unit . . . . 5
Effective Valve Checker . . . . 9
Versatile Amplifier Design . . . . 11
Electronic Voltmeter . . . . 15
Pre-Amps for Talkie Work . . . . 19
Alternating Currents . . . . 21
Research Workers Needed . . . . 27
Moisture Control for Textiles . . . . 30
Revolution in America . . . . 31
Distortion — Does it Matter? . . . . 34
Electronic Music . . . . 37
World of Radio . . . . 38
Short Wave Review . . . . 39
Speedy Query Service . . . . 42

##### 1949 10

CONTENTS
A Quality Amplifier . . . . 5
Practical "Q" Meter . . . . 11
Dodging the Transformer . . . . 15
Improved Noise Limiter . . . . 17
Alternating Current in Practice . . . . 19
Effective One-Valve Sets . . . . 27
Tuning Unit for Powerful Receiver . . . . 29
Short Wave Review . . . . 31
Bargain Corner . . . . 34

##### 1949 11

CONTENTS
Universal Output Meter Unit . . . . 5
Customer’s Choice No. 1 . . . . 9
"Ideal" P.U. Characteristics . . . . 11
Amateur Radio Activity . . . . 12
Interest In Gramo Reproduction . . . . 13
Applications of A.C. Practice . . . . 15
75-Watt Modulator . . . . 21
Trade Co-operation Essential . . . . 25
Frequency Records Available . . . . 27
Interesting Circuit Book . . . . 28
Shortwave Review . . . . 29
Shortwave Stations of U.S.A. . . . . 31
Speedy Query Service . . . . 34

##### 1949 12

CONTENTS
"Super-Six" Amplifier . . . . 5
Sets of Yesterday and To-day . . . . 11
Make Your Own Records . . . . 15
Double-Coupled Versatile . . . . 21
The Astor Models G.R. & G.R.P. . . . . 22
Our Technical Directory . . . . 26
The "Clapp" Oscillator . . . . 28
How to Get Started . . . . 30
Commercials on the Ham Bands . . . . 32
Official Goodman's Baffle . . . . 36
Radio Theory (Transmission and Reception) . . . . 37
Shortwave Review . . . . 45
Distortion Percentages . . . . 48
Speedy Queries . . . . 50

### 1950s
#### 1950
##### 1950 04

No issue published

##### 1950 05

No issue published