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In Reply to: Re: Tung-Sol, yum! posted by Jim McShane on July 20, 2006 at 13:33:13:
The Machine is in some respects more complex than El Cheapo (170v negative supply, bias supply), and in other respects simpler (no current sources, no caps in the cathode circuits). I would expect that the parts costs would be about the same for equivalent quality.I'm thinking of some sort of sand discreet or chip CCS for the tail, and just build a mongo bias supply to provide for it and the tail; the tail supply has proven remarkably noninfluential to the sound, in my experimentation. As it is, the 5965s draw 3mA each (6mA for the whole amp), so a resistor and cheap toroid is viable. As we discussed privately, I'm eventually going to VHF single triodes for the front end, and they like 5-10mA each, so a very long tail becomes impractical. This is something I got to get after.
I'm not sure what the final design of EC is, Jim. The only place I knew of to reference it was a mongerously long thread over on the other forum, and I didn't have time to wade that far downstream. Is there a more practical way to have a look at it?
Aloha,
Poinz
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Follow Ups
- Choices, choices. - Poindexter 16:02:40 07/20/06 (4)
- Re: Choices, choices. - Eli Duttman 16:46:20 07/20/06 (3)
- Re: Choices, choices. - Ron Oehlert 17:54:22 07/20/06 (1)
- 125 V. (nt) - Eli Duttman 19:30:57 07/20/06 (0)
- Yo, Eli! - Poindexter 17:09:43 07/20/06 (0)