I took a close look underneath and found it complete. The meter is intact and no evidence of fire. Going to rebuild it and see if it lives up to expectations. Been wanting one of these for a while...:)

If it lives up to its billing, I may have to borrow its output Iron for another project.

I love the looks of this, it runs the outputs at 46 Watts of dissipation each, and allegedly is only happy with EI KT90's. Fortunately I do have a quad of those. The outputs are big, far larger than the can the Peerless S-265-Q came in. Guess that's the diff between a 40W and a 60+ Watt.

Oh, didn't I have another project in the works...so easy to get distracted.
cheers,
Douglas

And then there is all of the rest of the circuit. Most of the values on the bigger resistors are marginal. It was just painted on the big brown bodies.

Fortunately the replacements are already gathered up in kit form. Just need to get a few minutes so I can fix it all up. Going to go and model the PS, I have some 1k2v SiC diodes from Cree that should do a bit better than the ancient originals. I suspect that the doubler circuit is going to have some big spikes of current delivery. No sense toasting them...
cheers,
Douglas

Douglas, I just built PP 300b with those transformers. Sounds good. I have my 8 ohm speakers connected to the 4 ohm tap. The loss of bass due to the lower relative inductance doesn't bother me as I am bi-amping into my subs at 100hz.

Have Fun...Tre'

• 300b PP

Draw a 1k6 load line on an 813 with 30% U-L, and B+ of 650-700V. Idle at ~140 mA and I am off to the races with this pair of Iron. I am figuring about 75W or so and being Class A all the way. I have some special power Iron on the boards with Heyboer. Half an amp DC from 500 to 700V with a few stops in the middle.

None of this Class A to Max-Power/N( with N being an integer larger than 1 ), and Class AB1 at Max-Power pile of Marketing beefalo-chipz....:)

I am first getting a kit from Jim so I can resurrect the amp and listen to it. Got a few pairs of Tektronix matched 12BY7A's in the stash to try on that one.

Tre'

• Atwood transformer tests

I don't suppose you'd care to check voltage ratio's with some 60 cps from a variac, would you? I am quite curious as to the exact details of the other version. If you do decide to get into it, could you also check the U-L tap location?
cheers,
Douglas

Tre'