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Mesa/Boogie .50 Caliber Amp Reverb

8/30/1999 5:51 PM
David Warren
Mesa/Boogie .50 Caliber Amp Reverb
The reverb effect of my .50 Caliber Mesa/Boogie guitar amp does not work until the amp has warmed up for 10 or 15 minutes. I tried replacing the Mesa brand reverb tube in the preamp, with a Sovtek 12AX7, but then the reverb would not come on at all. Is the problem still likely that tube, assuming the Sovtek was defective, or is it a component, like a capacitor, that is temperature sensitive or is not staying properly charged? I would appreciate any help, especially from someone who is familiar with Mesa amps. Thanks!

marrk The .50 caliber needs a 12AT7 for r... -- 8/30/1999 7:08 PM