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previous: Brett I have a Sano combo tube amp with a... -- 9/17/2000 10:17 PM

Re: Reverb feedback?

9/20/2000 2:50 AM
Deltablues	Re: Reverb feedback? Sypathetic vibration caused by speaker vibrations can cause this, especially if the tank isn't isolated from direct contact with the cabinet. 1. A bad/microphonic driver or return tube can cause this. Make sure you're using quality tubes and not chinese junk. Also make sure you use what your tube chart calls for. Some amps don't handle using 12AX7's in place of 12AT7's (the higher gain 12AX7 overdrives some reverb circuits making them noisey). 2. If the tank isn't already in a fender style vinyl bag, get one from someplace like mojo. 3. Check your cables, if they're not the high quality shielded variety, get yourself a good set. These fixes should quiet your reverb problems down.

9/20/2000 2:50 AM

Deltablues

Re: Reverb feedback?

Sypathetic vibration caused by speaker vibrations can cause this, especially if the tank isn't isolated from direct contact with the cabinet.

1. A bad/microphonic driver or return tube can cause this. Make sure you're using quality tubes and not chinese junk. Also make sure you use what your tube chart calls for. Some amps don't handle using 12AX7's in place of 12AT7's (the higher gain 12AX7 overdrives some reverb circuits making them noisey).

2. If the tank isn't already in a fender style vinyl bag, get one from someplace like mojo.

3. Check your cables, if they're not the high quality shielded variety, get yourself a good set.

These fixes should quiet your reverb problems down.

Replies:

Brett Thanks guys. Its a well made amp wi... -- 9/20/2000 10:20 PM