New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1922-07-02
Radio Amateurs
Here in Race
With British
=. Develop Most Sensitive
" nd Efficient Type of
Receiver for Short Wave
Communication Purposes
Two Systems Being Used
Development of Both Should
Bring Great Benefit to
public in Use of Radio

Bring Great BENEFIT to
public in Use of Radio
-, .,y.r.ss ard distinct courses
Ming followed by the radio ana
49,, .. I'll, country ard Great Britain
!. =, dsvelOpment Of receiving ap-
-. ,or continuously wave telegraphy
,,,,l.u telephony. Both courses
- The uimos; importance 70 the
:. ,.d each will exert great inhu-
-. -. or the future Of radio communi-
..s,, and entertainment.
"a. American amateurs. under the
80 otE. H. Armstrong. have gone
-. n, lines Of regeneration and
~.''s.,ion Of audible signals, as well
:. Assignment Of long distance recep-
49,. ar short waves by the super
,srodyrs principle, both Of which
,,,,n, were invented by Armstrong.
=. halfway ,rod in the development
:, these two has led Armstrong TO his
l,,,, triumph, the super-rcgcnera;ive
.-,,,n which undoubtedly IS the
...,,sst marvel Of the radio age in its
sS,,rsy and absolute economy OF OPP
ers,ion. 49, ..,...
-. British amateurs, restricted in
,.,, hobby BY ultra-conscrvative gov
,rmsn, regulations, have turned their
'..,,.on solely % radio-frequency
,-,i.hes,ion. This has given excel
~. results on all long and medium
,,y, lengths. but its success on the
,ssr,sr wave lengths has depended
,,l,lv upon the expert handling OF the
,.,rs.or. who has been compelled 20
80 tuned coupling circuits between
.,h Of the radlo-froqucncy vacuum
,gses
Isurels Rest on Americans
T. 4, too early yet 20 tell which Of
hs two systems will ultimately
,,vrps. but there Is no doubt that
n, lurels az the present moment rest
no, the American amateurs through
n, hates; achievement Of their leader
Armstrong in the production OF the
,spsr.rtgeneratiye system.
Before the appearance ~ THIS reVo-
l,,onsry circuit the British amateurs
we're quite confident that their sys-
,sz was equally as good as the latest
American practice, and did not ncai-
Az 10 state their belief. The irst
t,setiesl comparison between the two
sys.ems was made last December when
Paul Cooley. chosen representative OF
ne American amateurs, went over 10
Scotland, with a super-hctcrodyne re
teiver FOR the purpose o. attempting
% receive messages from ow-poWcicd
knerican amateur stations. Inc
british amateurs. through their own
CARNATIONS, in cooperation with the
Aneriesn Radio Relay League, also
listened in on the tests.
Quite recently the Wireless Society
q London az one O. its meetings pre-
stnte prizes % the leading Brit D
inaissrs who were successful in Pee
0yrg signals from this side az inc
t;ean during the tests while Iodiey
rs 10 Scotland. Mr. Z. L. Calscy. tie
tseial British observer assigned u
Gstlsy q, the temporary station IN
s,t,ltnd, was present az the meeting
t,t q, the request Of the chairman De
ssnned the British opinion OF the
tests in the following language. ac-
tordng 10 the report IN the wireless
Wr.f- n a. Tho NF.f
triieurs:
4 think il would be Of interest 20
point out here that TIE British entrants
made greater use Of high-ircquency
rtgnifcation than did the Americans.
The frs; four Of the most successful
q our amateurs or this side all used
fgh-.fequency magH.tcation on the
,aor wave lengths. Mr. Cooley
brought apparatus with him which was
ilpiesl Of the best American practice
nai they had evolved for long distance
ilori wave reception. and be did not
have any high-frequcncy magnihcatlon
!, front Of his dctcctor valve. lie
Used the Armstrong sgper-hcterody no
inneiple in which tie incoming signal
ut httsrodyrcd before the first detcc.
Tor valve. That scheme has been used
n u. country. and one listener az
least know obtained very good result.
With 4; but ln broad outline the sue
e''sisl receivers followed the same
general sehenc--onc, two or three, on
even four OF five. hlgh-frequency
'ages with tuned anode coupling be-
'sssr The valves. followed b. d dctcetoi
sFe and possibly one or two stages OF
ss.ifequency application"
HE British call radio frequency
application high frequency magni-
tssiion. Thus, some OF the British
.na;euFs were using as many as eight
H hine vacuum tubes IN their re.
's'srs during the tests Cooley used
t.hs N the supcr-hoterodyne receiver
Il took with him.
British Heard Every Day
"a his speech Nr. Coursey stated