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RE: What to do with 490V???


The KT88 was to be triode/UL switchable with a 24v zener drop to the screens in UL.

I figured the fast warmup of a 5r4 would create a V spike before the KTs warmed up. I'm using a 370Vac motor run cap paralled with 370V film snubber cap (total around 80uf). I was counting on the slow turn on of a 5ar4 to prevent the spike (which could go to 700 V). Though the caps may take the spike, the driver tubes might curse at me and quit.

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