Tube Amp Archive

Hi, refering to Tubeswell's diagram what is a good tone control to go into a driver/cathodyne phase inverter? The diagram stops at 1000pf. Thanks for any help.

My error. The PT is a Hammond 270FX 550v CT 173ma ss rectifier
I have fixed bias. If I don't like it with EL84s I can manipulate the Heyboer to see 8K or use a Hammond 1750F (7.6K) and use 2 6v6s.
Thanks for your time advise.

Hi all, I built an Ampeg SB-12 with 2-6v6,tied screens and plates together, used the Jim Kelley tone control values -love that big clean. I would like to try another one in an old project amp that is ready for 4-el84. The Hammond 1750F power transformer is listed at 173ma. The OT is a Heyboer Bandma...

Thanks Dorissant .

Hello all. I've looked at different JK schematics but I cannot find power amp node B. Node A is plates and screens, node C is the PI, node D is V1 and V2. Any help please.Thank you.