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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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In Reply to: RE: here's what started it posted by drlowmu on June 28, 2012 at 11:44:27:
"The TCSS never got installed. You wired the amp mostly with the inexpensive 12 AWG Carol, which has a "big wire" (very negative) thick and out-of-time sound to it."
Yes, true BUT: the Carol 12g wire was only to the rectifier (yellow and red), and the ground (less than 6" total in one uncut piece from the HV CT
to the input, through the cap terminals. There's no other wire in the circuit, period, except for the lead to the OPT which was paralleled with silver wire. BTW we both know Dennis uses the stock red and yellow leads out of the stock Hammond power transformer to his 5U4GB. That sure isn't TCSS. So, the ONLY real wire "flaw" is the 6" ground, that actually only counts from C2 to the input, which is less than 3".
So the 3" ground wire of heavy copper, was "bad". OK
The difference in the op points is NOT large, as stated, still UNDER max dissipation for the 2A3, and the 7B4 was "close". I don't see how this could dramatically change anything. I don't think the small voltage differences could be "heard", in fact, they could easily blur between "perfect" and what you would call "way off" just with the line voltage changing. So I veto that.
The missing multiple by-pass caps is the largest "flaw" and I admitted that from the word go (see original post)
I also got tired of the hum and installed a Bourns pot, which fixed that.
I'm not really trying to defend or prove anything, just state the what is.
I do believe that the paralleled caps (if done whatever right is) could be an area of improvement for ANY CIRCUIT, which is why I brought it up in my other recent post. I give Dennis direct credit for having pursued this, although I don't have any direct experience with "what exactly" he has done, other than note that he said "it's expensive, and will cost more than the sum of the rest of the parts". With that, it's hard to get moving, expensively, into darkness, to maybe achieve light.
Furthermore, I think a direct coupled SE amp is a good sounding thing.
Perfecting it, is just an interesting set of possibilities.
I and many others may not prefer the 7B4-2A3 to what I or those others are preferring now, but overall improvements in PS, wire and caps are still valid for other circuits, so whatever real findings Dennis can show,
can likely "help" other designs in these areas. I wish this "tone" could be upheld in this discussion.
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Follow Ups
- RE: here's what started it - GSH 12:55:07 06/28/12 (0)
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