OPT PP for GU50 Triode ?

[rongon]

Yes, 6N8S is a direct equivalent of the American 6SN7GT.

The 6N6P used in the amp design you're looking at is close to an American 5687, which has higher gm and lower ra than 6SN7/6N8S (but similar mu).
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[Marco audio]

Yes Rongon.
But i have 20 6N8S and μ is almost equal for both tubes.
If input signal voltage is 1v, i need 120 to 150v to drive Gu50.It works with 6N8S.

 

[Marco audio]

The output transformer was this:
TGL 40/001 INDEL - Transformer: speaker | 40VA; Sec.winding imped: 8Ω; 0.04/16kHz; TGL40/001 | TME - Electronic components

Is has only 40 W output power specs, but it has been built around 180 VA core, it works fine up to 100 W.

That project is from 2014 and I don't find my documents, just these notes:



In an other forum I have written:



I made PCB's for the power supply and driver board. I remember that some Finnish DIYers built these amplifiers.

The output transformer was this:
TGL 40/001 INDEL - Transformer: speaker | 40VA; Sec.winding imped: 8Ω; 0.04/16kHz; TGL40/001 | TME - Electronic components

Is has only 40 W output power specs, but it has been built around 180 VA core, it works fine up to 100 W.

Hello,

Finally it's a g807 Push Pull

Cheers