Radio constructor (pocket radio receiver) "Pioneer CS-1" from July 1959 was manufactured by the Tsentrosoyuz factory of food products in Moscow. The first in the USSR transistor radio constructor (radio receiver) Pioneer TsS-1 (Pioneer first, pioneer, TsS-1 - Centro Union, 1st) consists of a housing, radio components, components, nodes, electrical circuit and instructions that allow you to assemble the current transistor radio. Here are the impressions of Boris Nikolayevich Volovodenko, the owner of radio designer, from the town of Korolev, Moscow Region, who provided a photo of the designer for the site. An interesting design of the loudspeaker. The designer includes an extruded paper membrane and a DEMSH-1 capsule. A needle should stick to the DEMSH-1 membrane, which is glued to the paper membrane. In general, at that time, the usual design of miniature loudspeakers, as there was no other radio amateurs. An interesting design of the pointer and switch bands CB-DV (described in more detail in the book BV Koltsov "Radio in your pocket"). It is interesting to solve the issue of adjusting the volume and turning off the power. The sensitivity, selectivity and, accordingly, the loudness of the reception, changes in 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 power switch contacts. The technology of printed circuit boards was still expensive and inaccessible, and therefore in the designer the circuit is assembled on a get-up board with support pins. A lot of complex plastic casting parts attract attention. My overall impression of the receiver-designer: The radio-designer, despite some "lack of seriousness" in its purpose, however, represents a certain stage in the development of the transistor radio. I myself started on the radio with a similar, but later designer, "Cricket". At the beginning of the 60s, when transistor circuitry was in its infancy, such a receiver was a rather interesting and unusual design, considering that it was intended for independent assembly by radio amateurs.Here is a brief description of the receiver from the book by B.V. Koltsov "Radio receiver in your pocket": The receiver is enclosed in a case of 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 the internal magnetic antenna. Output power 20 mW. It is powered by a 4.5 volt flashlight battery (until 1961, the flashlight batteries had a voltage of 3.7 volts). The current consumed by the receiver does not exceed 12 mA.