Radio constructor (pocket radio) "Pioneer TsS-1".

Radio and electrical constructors, sets.Radio receiving devicesThe radio designer (pocket radio) "Pioneer TsS-1" has been manufactured since July 1959 by the Tsentrosoyuz cultural goods factory in Moscow. The first in the USSR transistor radio designer (radio receiver) "Pioneer TsS-1" (Pioneer - the first, pioneer, TsS-1 - Center of the Union, 1st) consists of a body, radio components, elements, assemblies, an electrical circuit and instructions that made it possible to assemble an operating transistor radio. Here are the impressions of the owner of the radio designer Boris Nikolaevich Volovodenko from the city of Korolev, Moscow region, who provided a photo of the designer for the site. Interesting loudspeaker design. The constructor includes an extruded paper membrane and a DEMSh-1 capsule. A needle must be soldered to the DEMSh-1 membrane, which is glued to the paper membrane. In general, at that time, the usual design of miniature loudspeakers, since there were no other radio amateurs. An interesting design of the pointer and switch of the SV-DV bands (described in more detail in the book by BV Koltsov "A radio receiver in your pocket"). The issue of adjusting the volume and turning off the power is interestingly solved. The sensitivity, selectivity and, accordingly, the loudness of the reception change, by changing the feedback due to the rotation of the transformer on the ferrite ring relative to the ferrite antenna. The transformer is located in a rotating plastic regulator connected to the contacts of the power switch. The technology of printed circuit boards was still expensive and inaccessible, and therefore, in the designer, the circuit is assembled on a getinax board with reference pins. Quite a few complex plastic parts-castings are noteworthy. My general impression of the receiver-designer: The radio receiver-designer, despite some "frivolity" in its purpose, nevertheless, represents a certain stage in the development of transistor radio. I myself started in radio with a similar, but later constructor "Cricket". At the beginning of the 60s, when the transistor circuitry was just in its infancy, such a receiver was a rather interesting and unusual design, given that it was intended for self-assembly by radio amateurs. Here is a brief description of the receiver from BV Koltsov's book "A radio receiver in a pocket": The receiver is enclosed in a case measuring 110x70x32 mm. Its weight is 300 g. The receiver is assembled according to the direct amplification scheme on four transistors and one germanium diode and is intended for reception in the range of medium (520 ... 1600 kHz) and long (150 ... 450 kHz) waves. Reception is carried out on an internal magnetic antenna. Output power 20 mW. Power is supplied from a 4.5 volt pocket flashlight battery (up to 1961, pocket flashlight batteries had a voltage of 3.7 volts). The current consumed by the receiver does not exceed 12 mA.