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Siemens V79 1956 - Amplifier/Audio-Mixer see more
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© RTP
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Siemens V79 1956 - Amplifier/Audio-Mixer Audio mixer amplifier, transistorized used in reporting.
The Siemens V79 is one of the first 2-way / channel portable mixer amplifiers: it has one channel for dynamic microphone and another for dynamic and condenser microphone.

Transistors: OC602 (4) OC603 (2) OC604 (7) OC71 (4) FD3 DF451

Two microphone preamplifiers with 2x OC602 each.
One power amplifier with 4x OC71 (or 2x OC603 + 2x OC604) in push-pull.
Built-in level tone generator for levelling with OC604.
Two display amplifiers (level meter) with 4x OC604.

Power supply: 67.5 Volt batteries.

Sound: Excerpt from the report by Artur Agostinho at Vasco da Gama Airport in Goa, on the visit of the Minister of the Presidency (1960).


In 1847, Werner von Siemens and Johann Georg Halske founded the "Telegraphen-Bauanstalt von Siemens & Halske" in Berlin (Germany).

Also in 1956

  • 8 of January - Operation Auca: Five U.S. missionaries are killed by the Huaorani of Ecuador shortly after making contact with them.
  • 19 of January - United Nations Security Council Resolution 111 relating to UNTSO in Palestine is adopted.
  • 19 of April - Actress Grace Kelly marries Prince Rainier of Monaco.
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