Tube Amp Archive

Tweaked a little for 415V: Bias Two Cap Tap Timmopher 2.png The DC bias voltage that is developed is fairly sensitive to the AC voltage at the transformer bias tap and that AC voltage never seems to be certain until you fire it up and measure it. Different 6L6GC's require different bias voltages in...

Ten Over wrote: ↑Mon Jun 16, 2025 10:51 pm Preliminary Circuit
Bias Two Cap Tap Tinnopher.png

Oh now what have we got here?
This is diffrent then Iv seen before?

I like the use of the 10K bias pot so a "regular" bias pot can be used.

Ten Over wrote: ↑Mon Jun 16, 2025 6:12 pm What plate voltage are you planing to use?

Im not 100% sure, Iv not built a SE 6L6 amp before. I figure Ill start with about 415 and see how it goes. My 6V6 Vibro Champ sounded better at 375 then it did at 415 (no worries, it was a JJ 6V6S). But Iv not tried to voice a 6L6 before. It will be fun.

6L6GC

Yes sir, I know its not normal. Putting something together that goes against the grain I guess. But when Im done I have a feeling it will be a KILLER sounding 10 watt SE amp. Thats my hopes anyway.......

Thank you sir for giving me a good starting point. Wasnt sure how low I should have gone.

Hello everyone!! Long time lurker, first time poster. Smitty told me to come check out the forum and boy was he right. This site is a treasure trove of info and friendly community. Thanks for having me. Well my question is this bias circuit in the picture, its ment to tap off a high voltage supply. ...