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