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Electron tube QQE03/12 Tesla is a double beam tetrode of 2 x 5 W anode dissipation . It is suitable for use as an hf amplifier, oscillator, frequency multiplier, operating at frequencies up to 200 MHz, or as a modulator. It is direct replacement for the american 6360 tubes and it is similar to the russian GU-17. New old stock tubes, directly from the factory packing (please look at the gallery pictures). Made in the 80's.