parameters for push pull class A output?

[Mouthurst]

Cgiff!
Since I do like the sound of the 6L6 style tubes I may go with 6550's but will still definetly drop the voltage as you suggest.
I guess its not a Matchless anymore but a Mudshark- Very Helpfull thanks

William


Gregg-With my limited experience Using 10w even though the thing is 2.5--I would think it's a safety margin.

William

[cgiff]

el34 Bias

Greg, Your correct about the cathode bias resistor wattage.
In a typical commercial amp I suspect you would see 5 watt resistors, The adjustable pots I used were not Pots but adjustable power resistors and I think the smallest size available is 25W. I use 2 Watt metal films for all the rest of the preamp circuits. 1 watts will work but I like the physical size of the 2's .
Cgiff.

[swt]

what impedance are you guys using on the output stage??. thanks!

[Mouthurst]

Well in the end I didnt do anything but change the EL34's to good quality 6550's to help with my higher voltage-no more RED PLATING, I changed the socket wiring a miniscule amount as I think there was potential for danger and problems with the metal bases of the 6550's. Other than that everything is as the drawing.
FYI
The 6sh7 Clubman35 common online I can say for certain works very well. Ive been using the 6550's now since the previous posts 10 Months! with no trouble-sounds awesome!

By increasing it to 55watts it has lotsa headroom and the fairly new Celestion Century 100$ebayscore(not the "vintage" model) is so crisp that amp makes you want to dance for sure.

-now Im figuring a way to lose the noisy 6sh7gt's by building an adapter to convert to ef86. In the meantime a rubber padded metal milspec 6sh7 will have to do.

Anybody got a use for 112,000 microphonic tung-sol 6sh7gt's??:-) just kidding

thanks
William
SWT
I cant answer the question because I dont know what you mean.