[Amps] Removing grid shorts

[Doug Renwick]

I have a GU-78B that has developed a grid short. I have determined the grid
short initiates about 2 minutes after power on and ends after about 5
minutes.

I have tried unsuccessfully to 'burn' the short by hooking up a 560µf
capacitor fed with 300vdc.

What other methods that can be tried to 'burn' this short?

Doug

 



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