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In Reply to: Lower gain (than 5751) direct replacement for 12AX7 tubes ? posted by Old SteveA on June 19, 2015 at 11:16:52:
A circuit designed for a 12AX7 is designed for a 12AX7, not a 12AU7, not a 12AT7, but a 12AX7.
If you need more volume control wiggle room, pad down your volume pot.
While you can get away with a 5751, the other tubes mentioned will need very different operating points to operate properly compared to a 12AX7. Your amp may also employ direct coupling, in which case you may end up causing significant damage by even attempting this.
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Follow Ups
- NO!!!! - Caucasian Blackplate 22:45:39 06/19/15 (7)
- RE: NO!!!! - Old SteveA 11:18:56 06/20/15 (6)
- RE: NO!!!! - Jim McShane 11:32:50 06/20/15 (5)
- RE: NO!!!! - Caucasian Blackplate 21:18:50 06/20/15 (3)
- RE: NO!!!! - Jim McShane 19:36:27 06/21/15 (1)
- RE: NO!!!! - Caucasian Blackplate 20:24:36 06/21/15 (0)
- Yes - Tre' 08:02:55 06/21/15 (0)
- RE: NO!!!! - FenderLover 18:13:51 06/20/15 (0)