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The First Steps (Part- II)

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ANTENTOP- 02- 2004, # 006

The First Steps (Part- II)

 

 

 

 

Vitaliy says us a story about beginning and the First Steps of Russian radio industry

Vitaly Brousnikin, vitalybr@onego.ru

 

http://oldradio.onego.ru/ 

 

The 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 30-60 m.

However, 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.

Soon 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" - "CRL-10".

Almost 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.

At 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

 

 

 

CRL-8

 

 

 

SG-6

 

 

SG-646

in1937(6A8, 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.

Then followed: the "SVD-M" using home-made metal tubes, the "SVD-9" and "SVD-10". They were followed

 

 

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