I bought this amp (Orange Rockerverb 50) used on ebay about a month ago and I love it, but I've noticed it gets very noisy if I turn the gain above 12 o'clock (the noise and feedback make it almost unusable). The reviews on harmony-central claimed that the quietness of this amp was great - not for me. Yesterday, a preamp tube went out and I'm wondering if all the extra noise was just the result of this bad preamp tube or could it be something else? Should I replace all the preamp tubes to get rid of this noise, or will replacing the 1 non-functioning tube fix the problem?
Probably, what guitar and pickups are you using?
try replacing all of them, because I've never heard of anyone else with that problem..
PRS McCarty guitar and the pickups.
Is the McCarty hollow or semi- hollow bodied?