Need help with OD3 circuit

[funch]

So .... I'm an idiot! Ignore my last post, and the 'X3' value in post #17. The bias of the input tube is set from pins 3 & 8 and is switchable between 1.5KR and 2.7KR.

 

[emk2]

Where did you get your OD3 impedance graph?

http://kolbrek.hornspeakersystems.info/index.php/tubes/testing-power-supplies

 

[57786]

So .... I'm an idiot! Ignore my last post, and the 'X3' value in post #17. The bias of the input tube is set from pins 3 & 8 and is switchable between 1.5KR and 2.7K

That will work better 🙂

 

[Solvt]

funch, the 3.3 and .1uF cap connected to the cathode side of the OD3 is connected to ground, not B+ ?