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Old 13th Apr 2021, 9:49 pm   #5
Join Date: Feb 2016
Location: Tauranga, New Zealand
Posts: 99
Default Re: 807 tube amp, any ideas?

Originally Posted by Radio Wrangler View Post
If you use ultra-linear mode, with the screens on output transformer taps, the transformer action ensures the anode is always more positive when the screen voltage is high. The electrons find the anode more attractive and screen dissipation is kept down.

The normal screen voltage ratings on a valve are for the case of fixed voltage screens. They don't count for triode connection or ultra-linear operation.

OK, thats good to know, because I had been reading another thread where people were advising someone not to use ultra linear at a high voltage.

Actually makes total sense as you say.

In the case of my guitar amp, they are running with their own grid supply.
I will have to post some pics of that in another thread.
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