Kamerton US-20C 1983
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Since 1983, the UST-20C tuning fork amplifier has been produced by the Kharkov Pribor experimental plant. RK is a set of necessary parts and assemblies for self-assembly of the highest class amplifier. The design allows the introduction of additional devices into it in order to improve operating conditions and further increase electrical parameters. The price of the radio designer is 90 rubles.
Documentation:
Information from collection of Valery Khartchenko