Help with design review wanted

[Hojvaelde]

Hey

I am working on a 20-35 watts amplifier. And since I have a weakness against topcaps I had to build such an amplifier.

I am planning to use a 6BG6G tube in pp with the following main points:
Raa = 6k6 with UL
B+ = 400 volt
Fixed bias.

I have compiled the following schematic,:
Is there something I have designed wrong and I am open to comments before I order the PCB.

Regards

Benny

 

[azazello]

There is a mistake, R23 must be connected to R11 !!

 

[Hojvaelde]

Hey

Yes big mistake. Thanks.

Benny

 

[Tom Bavis]

Thde feedback is grounded for AC through the 40 uF capacitor - I think you intended to cross to the 1K resistor.

 

[Hojvaelde]

Hey

Ver B included:

 

[Hojvaelde]

Hey

Ver B included:


Benny

 

[azazello]

Hi,
I think that positive side of this ampl. is only output power,
but I don't say the same for sound quality....I like SE and I'll prefer to use
parallel 6BG6 than PP....

 

[Hojvaelde]

Hey

I have all the parts to the PP amplifier. I have 10 - 15 if the valve so the PSE will come later.

Benny