Quote:
Originally Posted by Electronic M
I wonder if there are any loctal rectifier/output combo tube types? There is an octal type 117L7 IIRC that is a power rectifier/output pentode. Something like that would allow a preamp without the dead giveaway of a circuit change that a modern diode would be.
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I was originally thinking of the 70L7 rectifier/output tube and a medium or hi-mu triode. I referred to the 14B6, as it's a loctal based tube.
IIRC, the 70L7 requires a different output transformer, as it's a higher impedence plate load.