1955 Telefunken AC701 Triode Vacuum Tube – Vintage Original ’55 Working, Fully Tested w/ Complete Spec Sheet Microphone Tube Mic AC 701 (Ubc)
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– For your consideration is vintage 1955 Telefunken AC701 triode vacuum tube.
– TUBE INFO: Model – AC701, Date Code – Ubc, Mfg. – Ulm, West Germany, Date – May 1955, System – Triode
– TEST SETTINGS: Filament (V) – 4.3, Bias Volts (V) – 1.9, Plate Voltage (V) – 65, Heater Current (mA) – 106
– TEST RESULTS: Transconductance (𝜇Ω) – 2100, Nominal GM (𝜇Ω) – 2400, Minimum GM (𝜇Ω) – 1680 Plate Current (mA) – 2.07, Shorts – None, Life Test – 91%, Gas Test – O.K. Test performed on Hickok 539B. June 18, 2021
– Please scroll through the entire gallery to view the 9 images available. All photos are of the actual tube.
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