Hi gang, first time poster. Ordinarily I can answer all my questions by searching around, pooling resources. Not today, so I beg a little indulgence.
So here's a strange thing: my 71 Virbolux sounds great at home, shitty at practice; very muddy, no headroom whatsoever. For good measure I recapped, blackfaced, matched the symmetrical components in the power section, put in some lowergain preamp tubes and a balanced 12au7 in the PI.
No avail. Fortunately I brought my biasrite to practice today and read 225V on my plates and 196ma bias current on each tube! At home it was biased at 43ma with B+ at 428V.
What would cause this? For what it's worth, my practice space is in the basement of a laundromat in an old building in SF. Does the problem lie therein possibly? Anything I can do here or in my amp to fight back?
Really, thanks everyone for any help yall can suggest, dying to realize this amps full potention within the mix!
So here's a strange thing: my 71 Virbolux sounds great at home, shitty at practice; very muddy, no headroom whatsoever. For good measure I recapped, blackfaced, matched the symmetrical components in the power section, put in some lowergain preamp tubes and a balanced 12au7 in the PI.
No avail. Fortunately I brought my biasrite to practice today and read 225V on my plates and 196ma bias current on each tube! At home it was biased at 43ma with B+ at 428V.
What would cause this? For what it's worth, my practice space is in the basement of a laundromat in an old building in SF. Does the problem lie therein possibly? Anything I can do here or in my amp to fight back?
Really, thanks everyone for any help yall can suggest, dying to realize this amps full potention within the mix!
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