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STC 4020A TELEPHONE REPEATER VALVE of 1937

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STC 4020A TELEPHONE REPEATER VALVE of 1937

The 4020A STC valve of 1937 was a Telephone Repeater Valve with a heater voltage of 2 Volts at 0.25 Amps and an Anode voltage of 130 Volts at 1 Ma.

Nortell Collection

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A1779


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