UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Oh no

PJL · 21st May 2010, 9:56 pm

I think it limits the amplitude of the peak in the waveform on the grid and therefore the -ve grid bias on the PL81 created from rectification on the grid. Why not have a look on a scope?

Too little -ve bias and the PL81 might not turn off I guess? Too much and it might turn off prematurely?

21st May 2010, 9:56 pm	#91
PJL Dekatron Join Date: Sep 2005 Location: Seaford, East Sussex, UK. Posts: 5,997	Re: Oh no - another V4! I think it limits the amplitude of the peak in the waveform on the grid and therefore the -ve grid bias on the PL81 created from rectification on the grid. Why not have a look on a scope? Too little -ve bias and the PL81 might not turn off I guess? Too much and it might turn off prematurely? Last edited by PJL; 21st May 2010 at 10:03 pm.