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 Home:  Receiving: PHILIPS 'Q' VALVE, 1921

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PHILIPS 'Q' VALVE, 1921 The Philips 'Q' was a space-charge-grid Tetrode, the base had a terminal on the side for the inner grid. With a bright-emitter filament 3.5volts. Nortel Collection Add a memory or information about this object A1306

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