6P21S tetrode

Testing a directly heated tetrode

 With a screen supply for the curve tracer, now it was time to get some 6P21S tested under various screen voltages. I need to increase anode sweep to provide further visibility!

More curves

Author: Ale Moglia

"A mistake is always forgivable, rarely excusable and always unacceptable. " (Robert Fripp)

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