The small-sized loud-speaking intercom "Druzhok" has been produced since 1981 by the Novgorod Planeta software.
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The device is designed for negotiations between subscribers at a distance of 200 meters.
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The kit consists of two intercoms, in one of which a power amplifier mounted on transistors is mounted.
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In another intercom, a speaker and a call button are integrated.
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Switching from reception to transmission is done by the first intercom.
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The first device is powered by a Krona battery.
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Included is a two-wire cable 10 meters long.
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The price of the kit is 10 rubles.
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During the release process, changes were made to the intercom circuit, the price changed.
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Initially, the device did not have a name, and the name "Friend" appeared in later releases, probably since 1986.
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