The Following is a recent report I received on a Early 60's produced Valve.
It covers the Anode and Mutual Conductance.
As can be seen each Valve has a very good reading compafrd to a New Factory Spec Valve , whicch is the 100% readings.
What is not shown is if here is a Cathode / Heater Leakage that if present can impact on a Valves Function for the worse.
Tested on my uTracer @ 90V -1V
100% is 15mA Ia , 12.5mA/V gm
Valve 1
Section 1 – 17.16mA / 12.37mA/V
Section 2 – 16.13mA / 12.39mA/V
Valve 2
Section 1 – 17.39mA / 11.84mA/V
Section 2 – 18.92mA / 13.16mA/V
It covers the Anode and Mutual Conductance.
As can be seen each Valve has a very good reading compafrd to a New Factory Spec Valve , whicch is the 100% readings.
What is not shown is if here is a Cathode / Heater Leakage that if present can impact on a Valves Function for the worse.
Tested on my uTracer @ 90V -1V
100% is 15mA Ia , 12.5mA/V gm
Valve 1
Section 1 – 17.16mA / 12.37mA/V
Section 2 – 16.13mA / 12.39mA/V
Valve 2
Section 1 – 17.39mA / 11.84mA/V
Section 2 – 18.92mA / 13.16mA/V