Klausmobile Tube Tester Files

Saratov, 06/1970 - Dual diode rectifier, 75mA DC max, mini 7-pin package, indirect 6.3V, 0.6A heater. Spread of four different tubes, standard heater supply (per one diode in each). All tubes from one batch code

Effect of under-heating (this is tube #2 on above chart, counting from the lowest curve)

Original data sheet

Legend: White curves: Ig<5uA Yellow: 5<Ig<20uA Red: 20<Ig<300uA. Measurements terminate at Ig>300uA

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