I was asked to design a 30watter that is very, very clean and easy to DIY. My head immediately thought Fender AB763 circuit with 6L6GC's.
To keep it simple I opted for a single channel deluxe type combo driving a 12inch Weber. I do not really recommend fixed bias for first time builds, so a cathode bias topology will be used. To keep things clean, I am going to opt for ultra-linear output stage that can be switched to pentode for electric blues service. Here's a schematic of my proposal:
I rolled an output transformer with ultra linear taps and moved on to the power transformer.
Simulation of the power supply looks like this:
Rolling the power transformer has turned out a bit difficult. I am now at my third attempt; third time lucky they say :-\
