Changing the BALANCE (hum) pot to BIAS pot.
Original resistor setup. Unbalanced 68K-ohm grid-to-ground resistor on 6L6GC's. 47k-ohm anode plate loading resistors on phase inverter. Two lines coming off balance pot.
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Balanced 220k-ohm grid-to-ground resistors. 82K-ohm and 100k-ohm anode tied resistors. One line off bias pot.
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Topic - "Blackfacing a Fender Showman Reverb" - FenderLover 21:24:19 01/20/15 (10)
- RE: "Blackfacing a Fender Showman Reverb" - TWR 08:23:36 01/21/15 (0)
- Very interesting! - Dman 05:51:58 01/21/15 (8)
- Nice stack! 8^) - FenderLover 06:28:57 01/21/15 (7)
- That stack almost became a rack! I'm putting it into a pedal-sized box... - Dman 07:18:50 01/21/15 (0)
- That is probably not a parasitic oscillation - Chip647 06:47:30 01/21/15 (5)
- RE: That is probably not a parasitic oscillation - Dman 07:17:41 01/21/15 (3)
- Sockets have been changed twice. - FenderLover 07:32:38 01/21/15 (2)
- I'll have to look once I get home... - Dman 08:23:11 01/21/15 (1)
- RE: I'll have to look once I get home... - FenderLover 09:10:19 01/21/15 (0)
- Thanks, for reply - FenderLover 07:12:05 01/21/15 (0)