The 'Mule Project'- learning about valve/tube amps on a B25.

[pentode]

So along with replacing the smoothing caps, all components in the bias circuit were sorted as well as a tidier bias adjustment setup.


Here's the 50uf+50uf cap and bias bits. There's also a new power resistor connected between the 16ohm tap and ground.







A quick look at the inside with new caps, adjustable bias and slightly tidier mains wiring.
I've also removed the polarity switch and put the standby switch in its place.








A close up of the adjustable bias'







Some of the other things I'd like to try on this project are -

KT88s.

Sockets for monitoring bias and plate voltage with separate bias for each valve.

Switchable valve/SS rectifier.


Cheers
Grahame