Quote:
Originally Posted by straitwire
Hey Isaacc7, Dennis regulates the output tube screen grids (in Pentode configuration) and the input tube plate voltage with zener diodes.
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Good to know, thanks. Do you have any opinion on using the 7581a with the 5ar4? Also the manual says that you can use a 6bx7 as the input, what about the 6bl7? The preamp I'm getting has pretty high gain so I might have to move to the 6bx7 and would be interested it expanding my options to the 6bl7 if I could.