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triode GU-21B - (NIB)
GU-21B (ГУ-21Б) is a massive, air cooled triode in metal-glass design intended for usage as an amplifier or oscillator at frequencies up to 26 MHz in grounded-grid circuits. New in box tube, original documentation is included (please look at the gallery pictures). Nett weight of the tube including the heat sink is 6.6 kg (max. 8 kg according to the datasheet). Year of prodcution: 1981.
(we reserve the right to change the description and specifications without prior notice)