first Soviet mass superheterodyne R-set model "CRL-8"
designed by the Central Radio Laboratory was produced by the Leningrad
Kozitsky Works at the end of 1935. On its base the a
radiogramophone was created. The set used the tubes SO-182 (RF
amp), SO-183 (mixer-oscillator), SO-182 (IF amp), SO-185 (detector-AF
amp), SO-118 (AF step II), SO-187 (2 tubes in output "push-pull"),
VO-188 (rectifier). It had 4 bands including 2 SW: 17-30 m and
attempts to construct a home superheterodyne were made earlier.
For instance, as early as 1931 the Kozitsky Works produced some
units of 6-tube battery-sourced "super" model "SG-6".
The set included a loop aerial and worked on tubes of PT-2 type.
afterwards the Orjonikidze Works in Moscow commenced output of
the "SI-646" superheterodyne(AC-net Individual Six-coil
Four-tube Model of 1936"). In the first detector a SO-183
tube worked, in IF amp - a SO-182 one. The AF-step was using a
SO-187 tube. The set had three quite modern bands - SW of 19-50
m, MW of 200-550 m and LW of 714-2000 m. It had a number of interesting
constructive peculiarities. Among them there was a device for
fine tuning in the form of an additional round scale with a revolving
pointer and a tuning indicator on the base of a shadow galvanometer
- "orthoscope". Similar indicators were used in some
imported sets of that time ("Tefag" etc.).Unfortunately
the super "SI-646" was produced only in small lots.
Soon after the Kozitsky Works produced its all-band "super"
sumultaneously the Alexandrov Radio Works started production of
its famous superheterodynes of first-class series "SVD"
("Superheterodyne All-band with a Loudspeaker") using
as models the best American receivers of that time.The RCA radiotrones
6D6, 6A7, 6D6, 6V7, 76, 53, 80 were installed in the set.
the beginning of 1938 the "Electrosignal" Works
in Voronezh began mass production of none the less notorious radio
of those times - the "6N-1"
(initially spelled "6NG-1": 6-tube Tabletop with a Loudspeaker).
It worked using metallic tubes with 6,3 V heating, production
of which successfully began in the USSR
6K7, 6F5 - with a connection to the cap of the tube, 6F6, 5C4,
6X6, the 6E5 "magic eye"). The first batches of the
this set were equipped with American
tubes produced by the companies "RCA", "Ken-Rad",
"Tung-Sol", "Sylvania" etc.
followed: the "SVD-M" using home-made metal tubes, the
"SVD-9" and "SVD-10".
They were followed