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barrymagrec · 15th Apr 2018, 4:41 pm

The reference suggests 1948 so either EL31, EL37 or 6L6 one would presume.

The secondary impedance may be wrong but it would already be a very flaky design if that pushed it over the edge, I would have thought.

http://www.r-type.org/refs/ref4035.htm

15th Apr 2018, 4:41 pm	#7
barrymagrec Octode Join Date: Dec 2017 Location: Morden, Surrey, UK. Posts: 1,560	Re: Trouble with Valve Amp The reference suggests 1948 so either EL31, EL37 or 6L6 one would presume. The secondary impedance may be wrong but it would already be a very flaky design if that pushed it over the edge, I would have thought. http://www.r-type.org/refs/ref4035.htm Last edited by barrymagrec; 15th Apr 2018 at 4:46 pm.