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Do It Yourself (DIY) paradise for tube and SET project builders.

RE: it was your design ...

Correct- back then. We have evolved and learned things since 2006-08 I hope, all of us. Since about 2018, we regularly use the 6 Ohm Hammond 159ZAs, 1 A. rated chokes. Other than a 75 hour break in, they work and sound fine !! Preferable to Stancor c-2708s.

In retrospect, I was mistaken to even mention on A.A. those cheapie Triads in 2006. Sorry. But now you know !!

However, 12 Ohms DCR total - to the output transformer for both Ls -is really a lot of fun to hear !!

Cleartimestream, I also LOVE what GTO caps do to the Finals filtering. About $50.00 each. One GTO 5 uF across ( bypassing ) a 30 uF WIMA 4 Pin C1 and a second 5 uF GTO across ( bypassing ) a 50 uF at 800 VDC 4 Pin WIMA C2.

Also, starting in 2019, I have gone to two 5U4GBs, each as a separate diode, for rectification.

Well, there you have my current favorite topology. YMMV. Contact me if you have any questions.


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