In Reply to: Another attempt (no 3.) at 813 design posted by Bas Horneman on July 1, 2002 at 13:39:34:
I'd shoot for 250 Vp/9mA for the 6SN7, and 250 Vp/15mA for the 6BX7. Use 820 ohms on the cathode of the 6SN7, 910 ohms for the 6BX7. Go for largish bypass caps, say 470uF. Even better is a parallel 6BX7 at 30mA and use 470 R on the cathode. I'd also use fixed bias on the 813.
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Follow Ups
- Re: Another attempt (no 3.) at 813 design - groverg 16:15:38 07/01/02 (0)