Receiving and transmitting complex `` Signal-1 ''.
Radio and electrical constructors, sets.Receiving and transmitting devicesReceiving-transmitting complex "Signal-1" has been produced since 1972 by the Kiev PO "Kristall" named after Lenin Komsomol. Simply put - radio control equipment for models. The most widespread and affordable RU equipment. There are at least 2 modifications: on germanium transistors and a relay at the output of the receiver and on silicon transistors and a transistor switch instead of a relay. The transmitter is the simplest generator; a 1 kHz multivibrator is used as a modulator. The radiation frequency of the transmitter is 27.12 MHz (this frequency was allowed in the USSR for the RU), the output power is 10 mW (the allowed power without the need to register the transmitting device). The receiver is a super-regenerator. In the first version, its sensitivity was 100 µV, in the modified version - 50 µV. A "command device" is connected to the output of the receiver - this is a motor with a reducer, a ratchet and a textolite gear. On the gear there are "tracks" (in fact, this is a printed circuit board), which close 4 contacts in a certain sequence. These contacts are included in the control circuit of two motors, which directly "move" the model. One press of the transmitter button corresponds to the rotation of the gear by 1 "tooth" (18 in total). The commands were executed sequentially, in accordance with the "program" on the gear. Therefore, in order to switch from one command to another, skipping the "programmed" ones, you need to press the transmitter button a certain number of times. In those years, many articles were published in various journals and books describing the "Signal-1" equipment and its modernization. For example - several articles published in the magazine "Radio": No. 08 for 1982, pp. 49, 50, 51 + tab on the last photo (The first version of "Signal-1" and the principle of its operation); № 12 for 1983, pp. 52, 53, 54 ("Signal-1" with your own hands + 3-phase multivibrator instead of the command apparatus); No. 06 for 1984, pp. 50, 51 (Modified "Signal-1"). It is this last option - in the photos below.
