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6AQ5   EL90
6AQ5 is an American valve (tube) that was originally intended for application as a 12W audio frequency (AF) amplifier and later also in the vertical deflection of a television set. In some spy radio sets however, it is used in the oscillator and/or PA stage, either as a single valve or in push-pull configuration. In practice it can be used for frequencies up to 16 MHz or more.

 6AQ5 datasheet

Pinout as seen from the bottom of the valve

6AQ5 on this website
French spy radio set for voice (1949)
4-piece (or 2-piece) valve-based spy radio set
French plug-in transmitter Type 2
Belgian RST-101 spy radio set (MBLE)
PD-5 spy radio transmitter with PSU
French TR-TG-2A spy radio set - WANTED
Further information
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Crypto Museum. Created: Friday 16 December 2022. Last changed: Friday, 01 September 2023 - 07:55 CET.
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