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fixed bias change the grid voltage on clipping
Last week testing the power of my 211 amp begin to measure different point to see what happen when 211 begin to work on clipping.
Plate 1040V no change with or without clipping
Cathode 0,65V on testing resitor 10R change from DC + AC = 0,65v rms
Grid : -55V standby
Grid: -100V( more or lees ) on clipping
I never measured this point on clipping before, but I would like to understand why. The grid resistor load is 220k why on clipping have dc current in negative voltage to change the voltage from -55v in standby to -100v at grid
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