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Old 15th Apr 2021, 4:43 am   #10
Radio Wrangler
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Join Date: Mar 2012
Location: Fife, Scotland, UK.
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Default Re: 807 tube amp, any ideas?

Ultra-Linear is sort of part-way to triode connection. The screen follows a percentage of the anode swing. For triode connection, that percentage is 100% for tetrode operation it's 0%

For ultra-linear operation, different people have pinned the tail on the donkey at various percentages. The tetrode end of the range (0%) tends towards more gain and more output power. The triode end of the range (100%) tends towards lower distortion at the expense of lower power and lower gain.

David
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