I have a fender princeton chorus that I bought, I’d say at least 10 years ago. So it’s not exactly new, and I think I’ve even had the same problems before and got it fixed, but I’m not even sure. If I did it was some time ago and since I’ve rarely played the electric in recent years I’ve kind of neglected the amp a great deal. But now I’ve got some important performances coming up in a very short time (namely for a local theatre production of The Rocky Horror Picture Show (I plug when I can)) and I sure could use some quick advice.
Here’s the problem: The amp seems OK at first when I turn it on. After playing for a short time (10 - 20 min.) it develops a loud buzzing hum (which in the distortion channel is simply unbearable; in the clean channel it is present but not terrible). The more I continue to play the worse it gets.
The questions: What is the problem or the possibilities? How much could I expect to pay to have it repaired? Is it something that a complete layman who’s good at following directions, like myself, could possibly fix himself and save some cash?