R2 was changed to 73k  to help account for the VGS of the mosfets chosen. 73k pull up to 24 volts and 220k pull downs to neg. gnd

The output fets needed a new bias setting to ensure 12 volts to the heaters. I left c7 and c8 off , used 1000u caps for B+ bypass ad to couple to the output. That should improve the low end. 12BH7 tubes can be used to run at 300ma for lower impedance cans, but larger heatsinks are necessary. I...

Our PCB's ae stuffed and mine is set up for 12au7 and 24volt supply, sounds very good. Wes is doing a 48volt version ans his supply is still not here.

We built 2 boards over the weekend, one for 24 volt and one for 48 volt.  I used a 12au7 for the 24volt version and it works good. I upped the coupling caps, used 1/4watt resistors to stuff the PCB.

 I had sockets on order from china, I had everything else.  I stuffed mine for 24volt operation, Wes did his for 48volt supply. Thanks for everyones support!!!!!! I have a hard time finishing someone else's design. I've just been building my own designs for years so I have full understanding of...

Ive been into tubes for several yrs and have created several low cost hybrid designs capable of driving any of the impedance s of the cans on the market. I also have a PP transformer coupled designs completed but not built. Being new to this forum I still can not post pics or schematics of my...

I've been playing with tubes for yrs and did a couple tube mosfet hybrid amps for fun. One became a stocking stuffer a couple Christmases ago. Being a new-be on this forum I will eventually acquire photo posting privelages.

I was given a PCB as a gift, but without doumentation. Is there a schematic and stuffing diagram for the PCB?  The PCB is a light green with a dark green solder mask. has provision for 6 pin pot on the top side and has  X10034 as an identifier, 3"x3". I was told it was for a 12au7 version of...