ACTIVITIES OF AMATEUR RADIO DESIGNERS

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00809A000600300678-6
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 3
• Document Creation Date: December 22, 2016
• Document Release Date: September 7, 2011
• Sequence Number: 678
• Publication Date: May 2, 1950
• Content Type: REPORT

Sanitized Copy Approved for Release 2011/09/08: CIA-RDP80-00809A000600300678-6
COUNTRY
SUBJECT
HOW
PUBLISHED
WHERE
PUBLISHED
DATE
PUBLISHED
LANGUAGE
INFORMATION FROM
CLASSIFICATION CONFIDENTIALCONfifEN11Aa
Scientific - Radio
Monthly periodical
Moscow
May 1949
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AOITIO ITLAW. ORONY[TON IT SOIL Io[N II PNOHI1rc[-
DATE OF
INFORMATION 1949
DATE DIST. A May 1950
NO. OF PAGES 3
SUPPLEMENT TO
REPORT NO.
THIS IS UNEVALUATED INFORMATION
For the third time since World War II, envelopes containing lengthy
descriptions of exhibits are collecting at the address of the Exhibition
Committee for the Eighth Correspondence Radio Exhibition.
Of course, the number of entries in any exhibition is not a decisive
factor, but the total number of participants is an excellent yardstick of
the activity of radio amateurs and of the quality of the work done by
local Dosarm organizations.
In 1947, about 400 exhibits were entered in the first postwar Corre-
cpcnd_-ncc Radio Exhibition and about 600 the : llowLig yam . By tiie end
of March 1949, approximately 1,000 had been entered in the Eighth Corre-
spondence Radio Exhibition. Dosarm radio clubs have worked hard to secure
a large number of descriptions and to prepare for this exhibition.
The participants are enthusiastic radio amateurs who devote their
spare time to building models. Their work is of great interest both to
the industrial' workers and the managers. It shows the trend of current
requirements and suggests methods for satisfying these demands. Moreover,
the radio amateur is apt to put much that is new and interesting into his
exhibits. This fact has been corroborated in many instances by previous
exhibitions.
After the war, our broadcasting apparatus consisted exclusively of
second-class superheterodyne receivers which were practically replicas
of prewar models. The Radio-Amateurs' Correspondence Exhibitions showed
that there was a great demand for crystal receivers, mass-production re-
ceivers with only a few tubes and without the short-wave band (unnecessary
in most parts of the country), compact radiophonographs, a simple type of
television set, etc. Amateur models showed the advantages of replacing
-1 CONFIDENTIAL
CLASSIFICATION CONFIDEPITIAI.
STATE NAVY NSRe DISTRIBUTION
AMMO AIR FBI
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CONFIDENTIAL
tube rectifiers with selenium rectifiers, the convenience of push-button
switches, reflex circuits, etc. This original, amateur "order" was ac-
cepted by the radio industry which is now meeting the demands of the
amateurs.
The general character of the exhibits in the rnrren+ a gu+, ....,,,
bition is extremely interesting. Since they are still continuing to+ar-
rive, it is too early to form a definite conclusion, but probably the
general character of the grou_:, will not show any essential changes.
The most important group is always that of broadcast receivers.
A large precentage of the receiving sets are crystal and mass-type
receivers with few tubes, and battery -operated receivers. The increasing
number of exhibits in this group indicates; first, that there is a grow-
ing demand for simple receiving sets--crystal and battery receivers being
in special demand by the rural population; second, that a large and active
part of the amateurs are interested in promoting the radiofication of the
country. Crystal. receivers and sets with few tubes are being turned out
in large numbers by Dosarm clubs and amateur circles. Many of the exhib-
its represent such "series" of receivers, installed in kolkhoz homes and
proved in operation.
Another interesting group is that of universal receivers. The demand
for such sets stems from the fact that aura: electricr -power stations in
electrified districts do not operate during all the broadcasting hours.
Some shut off the lighting mains during pea?:-load periods. All amateurs
did not solve their problems in the same way. Some built sets which oper-
ated both on line power and on batteries. Others preferred to use only
battery tubes in a receiver equipped -with a storage battery and rectifier,
and with a vibrator power supply. When station power was available, the
storage battery was charged with:.ut preventing its simultaneous use to sup-
ply the receiver.
These to systems of universal supply for receivers are not the only
possibilities. But as yet, although there is great need of other systems
experience in building such equipment is lacking. For this reason, ama-
teur experiments along these lines w?DuJ_:: be very valuable.
Second-class receivers and multitube sets occupy a more modest place
in this exhibition than in previous ones. The ratio of receiver types in
the various groups is illustrates by the fcllrwina figures: by 27 Marrh,
,2 second-class superheterodyne and 62 crystal sets were entered in the
exhibition.
There is a continuous increase in the group of exhibits showing ap-
plications of radio techniques and methc?is in the national economy. This
is an excellent index of the trend of amateur work. These exhibits are
extremely diverse because the amateur tuilders are engaged in various
fields of the national economy and ut_1i:.e th.ir experience in radio to
aid their professional work. Thus, in this group of exhibits one may see
electric therapeutic apparatus, geological and prospecting devices, equip-
ment to determine the moisture content of materials, and many others.
There has been a sharp rise in the number of receiving public-address
units and amplifiers. This is another indication of the great demand for
such apparatus in clubs, kolkhozes, sovkhozcs, and individual enterprises,
and also of the growing participation of radio amateurs in ralofication
work.
There is an increase in the number of exhibits in the group connected
with sources of power supply. Amateurs are devoting much thought to this
CCNFIDEN7Inl
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2 FIOENTIAI
proble-, since it is of great importance IT,. -the radiofication of rural
areas. There are a number of entries of homemade wind-driven genera-
tors, some of which deserve serious attention.
The section on sound recorders seems larger than in any previous
exhibition. Extremely modern and
e
the predominating feature in this group. Tsup. h regw man anyoddifferent
types, from complicated installations with several motors and separate
attachments for recording, reproducing, and "erasing" the records, to
"reporter"-type nortable recorders with a spring mechanism which can
be used while traveling.
The television section is not very large but contains some in-
teresting exhibits, such as extremely simple television sets with ten
tubes and with crystal detectors acting as mixers and second detectors.
Due to the complexity of television, every step in this direction is
important and of great potential value.
The section on measuring apparatus was well represented. It is one
of the better-established sections, since radio amateurs are aware of
the importance of measuring instrumento and auxiliary apparatus in mod-
ern set design and construction. There are fewer innovations in this
section but the work is more professional. Among the exhibits there are
complete tenting outfits sufficient to equip a laboratory for radio ama-
teurs or even a repair shop.
An outstanding feature of the group on short-wave apparatus is the
large number of transmitters of various power for different categories
of short-wave amateurs. There are about 50 of these transmitters, an
unprecedented figure for correspondence radio exhibitions. The number
of ultrashort-wave exhibits has increased somewhat. This is evidence
of the desire of radio amateurs to master this interesting and important
band. Up to the end of ?larch, the number of entries in this field ex-
ceeded 100 -- the largest numbE-r by far in these exhibitions.
The section on visual aids was well represented. It would be im-
possible to overestimate the value of such aids to the radio technician.
They constitute one of the most important factors in training novices.
At the moment, it is impossible to examine individual exhibits as
the jury has just begun i s wor}:. Bet even this sketchy outline Is
enough to show how participation of radio amateurs in the radiofication
of the nation in increasing, what a vast field lies before the amateur
radio builders, and how well they are finding ways to apply their crea-
tive genius, which is of the greatest importance to the country and to
the general development of radio techniques.
From every viewpoint the eighth exhibition shows greater progress
than any previous exhibition.
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