alexg said:
I did an 832A PP first using a CT choke for phase inversion and it worked fine, sounded better than my LTP phase inverter based on the coldwar project at ultranalog.
Then Yeo of diyparadise.com suggested to use the output self phase inversion which I tried. It sounded excellent and is as good as the CT choke phase inversion.
In the end, I took off the CT choke phase inverter (I will be using it on another PP project either an EL34 or KT88 PP).
The CT choke phase inverter is really nice to use, lessen the number of parts that the signal must go through.
The 'compact' version of Yeo's that you tried--- how did you tie down the cathodes? which output tubes did you use?
Your the first person I've heard who has tried both ways. And I find it encouraging that you liked the results of each approach.
Next week I'm stacking some remaining Z-565 coils that I have--- pp guys for EL84's with UL taps--- I'm going to have to try the compact myself after admiring it for such a long time on paper.
Did you try Yeo's circuit with the EL-84 triode as the voltage amp?
If so--- was it quiet enough? Other feedback I've gotten from people is that the EL-84 T is noisy when used as a small signal
driver tube.
In terms of simplicity--- the compact is hard to beat. And if your on a budget at all it would seemingly also recommend itself highly.
msl