SET Asylum

Single Ended Triodes (SETs), the ultimate tube lovers dream.

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Original Message

here's what started it

Posted by GSH on June 28, 2012 at 10:48:57:
Here's my original post, and yes I was coached by both J and D as the project was made. And yes, there's what I'll call micro differences, some of which "may" have been improvements....

http://db.audioasylum.com/mhtml/m.html?forum=tubediy&n=153234&highlight=Satan+patiently&search_url=%2Fcgi%2Fsearch.mpl%3Fforum%3Dtubediy%26searchtext%3DSatan%2Bpatiently

I had not "yet" tried multiple by-pass caps, because I didn't have any at the time. I did however make an effort to minimize wire, see the pictures (much less than what Dennis does, I've seen the underside of his amp BTW).
I also had a much lower DCR power trans than Dennis uses, whatever that's worth, and I used dual 5R4GY's instead of one 5U4GB, which Jeff should like. I had custom made filament transformers with a tab for a CT that the R and Ck directly soldered to, from there to ground, (no wire).
Yes the voltage on the 2A3 was a little bit higher than what was "recommended", I didn't think that could "ruin" anything as the 2A3 was still operating UNDER max dissipation. I tore the amps apart 2 years ago or more. Before I did, I changed the driver to a CCS loaded lo mu triode,
instantly cleaner, better. I also changed the PS to "normal" which made other noise go away, but we now know that the original PS was "no good".

Jeff later felt happy to thrash my build, yet thankfully admits having misadvised.

See:

http://db.audioasylum.com/mhtml/m.html?forum=set&n=69636&highlight=grant+handley&r=&search_url=%2Fcgi%2Fsearch.mpl%3Fforum%3Dset%26searchtext%3Dgrant%2Bhandley