The Washington herald., 1922-10-01
Test Signals Obtained by
New Receiver Remark
e. ably Powerful.
SET is NOT COSTLY
Comparatively Simple Both
To Make and Operate, Even
By Amateurs.


Eadio News. Some of us have
rcarned-possibly for the first time
that there are several kinds of re-
Sistances, positive. zero and mega
tive
We have read lengthy discus
sions concerning audible and super
audible frequencies of variation
complicated diagrams have been
flashed before us and each one
seems a little different from the
last and slightly more difficult to
understand.
However. just as the authors OF
recent simplified radio textbooks
all seem to have separately reached
the inevitable conclusion that
waves are formed when a stone is
,.rupped into a pool of water. SO
;lc various writers of articles on
/. .upt Regeneration seem to agree
that the same amount of amplih-
ration formerly obtained with nine
,acuum tubes can now be obtained
with three tubes by means of this
new method of reception.
This statement is 20 intensely
interesting to the radio enthusiast
r,w TO build a receiver of this
syDc. il continues
Many Fail to Operate.
Undoubtedly a great many super
rtECnerativc receivers. have been
constructed but. for some reason.
many Of these fail TO operate prop
crIy This may be on account of
Improper assembly or the use OF in
,nrrect material. The super-regen-
s-rative rcuit is very critical and
the proper values throughout are
essential Another reason for poor
results may be the inability of the
operator to tune the circuit. or his
lack Of knowledge how to approach
this
There super-regenerative
-e"eiVer which has actually
worked and worked extremely well.
The results are almost unbelievable.
With small loop three tubes. zoo
volts of plate batteries and a loud
speaker the signals obtained with
inis reCe YER were loud enough to
Tc heard three or four blocks away.
The writer has constructed five
-cparate sUper-reEenerariye re
rrivers for test purposes. each o..
which employed a different cUit
nation to obtain various results a
commended by Mai. Armstrong.
No Unnecessary Controls.
The receiver represents the re-
-rlt Of much experimentation in
.ttsiGn and operation. 1t employs
IN tine good features of the sets
'.r-y.ousIy constructed and ell mi
mates unnecessary controls. The
.st As been made as compact as
""s .ible. it only measures IL 1-2x
80 i-2N12 inches"
"In, back of the panel is shield
. {" assist in preventing body
,.t9Jc.ty effect while tuning and. if
.I, proper tubes and the correct
.l.-~< Of plate and grid batteries
..rc used and the instructions for
operating are follow, Il. excellent
-e-ults will be very easily obtained
i's anyone.
IL Is e mistaken impression that
''r. -apcr- -T"=.'nerative receiver is
80, mel. difficult To operate. We
'.-s- 1-uud th;'I must instances Of
.ss' 90 10y cSH"rimcutcrs are due
-p ...lus minor fault in conStruc-
..:. However. one cannot expect
.s. .--rJtr uper-reGencrator in
....r "r a sincIc-c!rcUit tuner
-ui'= viii not b. obtained by
.sv=:r-. the dials around at random
-,',a circuit must he turned with
a.. ard intelligence and some
20. .f.dcc u j. hc :..-
~.-rs .r.d b, tn, various controls.
-~ can best bc obtained. Of
..r~.'. o. -rudyiug Tn" theory Of
~ '''''''''
i;c~E!'> i:a~' {" ''c'.
iI--, C,-r tho same results can
To-. ..ir-u.I even r,v =, rnvtr. if he
'.,, t,..f-u...rrrs ,.arctuIIv
-T.e .r.,u-' uard in this receiver
-.., ..u r., ,..r,,ut -ir,.r 10, Mai.
--...- . ..- i.r:trr,. ,n tnc
r....T,.. ,'TlI, 90 America There is
..u. rrfrt rT d,ncr.-rc--thc Ioca-
r.., of tho grid bytfcrv ES Hy
...a-iu. The Erid battery in this
.,. ton Il negative potential is i'm
....--cd ON the crids of the first
...-. tubes The operati0n of this
-r,- -l,r is thereby somewhat slmpIi-
..d Previous ARRANGEMENTS of su-
rcgcucrative receivers required
800 Grid batteries. one for each of
r~ first two tubes. This has some
.tyautaGc when receiving tubes are
.-rI. hut as best results are OBJ
5 ii :o.s5:: ! e ,s:::.s5 &c: & s' e: :; VS. &;