Re: [Amps] Runaway Plate Current

[Bill Turner <dezrat1242@wildblue.net>]

IMO, putting a tetrode into standby by removing screen voltage is bad design
for the reason the original poster mentioned. Depending on the tube, even
zero screen voltage may not put it all they way into cutoff anyway. 

Much better to leave screen voltage applied and just bias the control grid
into cutoff.

Opinions may vary, but that's how I would do it. 

73, Bill W6WRT
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