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RE: Schematic shows 5U4 5V4

Thanks for advice. I have both 5U4 and 5V4, and 5V4 gives slightly higher B+. I have GZ34 to try as well.

Now at 405v plates, 1.20V at cathode, -32V at grid. Pretty close.
Adjusting bias, I can get the B+ to go up, but cathode voltage drops to around 1V.

Rough calculation of current: 1.21v / 26ohm (each side of 52ohm balance pot) = 46.5mA ?

Anyway, not worried about it much.



Edits: 06/14/17

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