Tube DIY Asylum

Posted by PakProtector (A) on November 11, 2016 at 05:16:49

In Reply to: RE: DYNACO Low Power amp with EL34 instead of EL84 posted by Eli Duttman on November 10, 2016 at 19:58:30

To Eli's point, complicate that schematic a wee bit. Use a CCS and built the input stage into a LTP. Keep the B+ low and run Class A bias. Attach the LTP to their corresponding screen taps instead of another de-coupled supply and do away with the loop NFB.

You'll need some negative voltage for the CCS to work into, and you might as well have it do double duty as a bias supply. For a first cut, a 6SL7 should work OK...you can move to a pentode input stage later( 6AU6's perhaps)
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.