two transformers as one - series/parallel

Not just the transformers, but the tubes have to be matched also.

Mr Crowherst talks some about just such imballance and how to compensate for a lot of it with a simple resistor. Although your circuit is hooked up differently (still not sure exactly how, but I know you will tell us sonn enough) you may be able to apply similat techniques to compensating for any imballance.

One of my friends built a dual transformer output for a power amp without balancing it and it sounded awful. He didn't even try to fix it, just scrapped the project and went on to the next. They can sound good, but it takes some trial and error to get it right.

In push - pull power amps they put cathode resistors on the output tubes to allow for differences in conductivity. You loose some power at the expense of allowing some "mush factor" splitting the load between the tubes.

Thomas, I noticed that you kept the pi filter in the V76.
Do you like it>
I heard a V76 with the filter (I believe) and I think it sounds great.
Thanks,
cj

CJ, I have not updated the V76 page in awhile. I did keep the PI filter but made some other little changes. I am waiting on a switch to test one final mod then I will update the page and give results of my tests. So far so good though.