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Re: And a good opinion at that!

69.12.241.189

Posted by bobbyj on December 12, 2006 at 10:06:33

In Reply to: And a good opinion at that! posted by Naz on December 11, 2006 at 16:48:23:

Thanks for the "feedack". I guess I knew I wouldn't get any (or many) hard facts by just asking for them, and placing the responsibility back upon myself, and my experiments, is appropriate. Honestly.

Although I can "like" a variety of amplifier circuits, I always end up
preferring (or "coming home" to) a single 45 or 2A3, AC filament, and just a single low or medium mu triode in front. To me it's really just splitting hairs between RC coupled(choke or resistively loaded), IT coupled or direct coupled. I'll admit that a DRD direct coupled version, has a little "something" extra. I have found when direct coupling anything, lower (or very low) ripple in the PSU is "required". I achieve this the standard way with sizable chokes and modest cap values. Perhaps because the amp circuit doesn't have huge voltage or current demands (in a relative sense) the "highish" DCR
supply I make, "performs pretty well", at least it sounds very good.
I guess because I feel lucky in a sense to have "committed" to this
simple amp type, I don't seem to need to confuse myself (at the moment) by searching for another. So, still being a busy brain, I guess the place to focus, is on seeing whether I can "support" this
simple SE 2A3 "better" by investigating PSU "improvements". When I look at Gary Pimm's SE 300B schematic and the commentary, and because I somehow like and respect him (even though I don't know him) I start wondering what elements of his design could I apply to my lower power version. Because I guestimate that I have good output iron already,
am OK with the AC filament hum level (which I can't hear when tuned out) the frontier is about tighter bass, speed and darkness of silence or background. These fringe characteristics are probably about loading and/or PSU. Again, because of the "relatively" low demands of the little amp, improvements are most likely to be in a world beyond anything I can devise out of purely organic "combinations" and enter into, unfortunately, things I don't quite understand. There are obvious "losses" occurring in conventional loading, as small as they may be. This seems like a place to investigate. Any further comments directed to the more specific case I've described would be greatly welcomed. thanks

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