My First Post:
I've read through every post I could find on the HRDx with a problem and yes, my problem sounds similar to some others but I figured that I'd ask anyhow: BTW: I know how many people hate this stupid amp, but I really like the way it sounds and want to try and keep it.
The Problem: plays fine for a little while, maybe 15 minutes, then it just lets out a buzz like a freight train horn. This particular noise is not affected by volume controls. If I switch to standby and then back on again it goes away for a little while then comes back again. Tubes have been switched around and around. I know it sounds like a solder joint or even the plate resistor problem but I'm asking anyway.
It's under warranty but has been back for the same problem 4 times (two different techs) and I don't think I'm getting anywhere with them. I even called Fender and they were worthless. The last tech did fix a cold solder joint which helped the situation (does it much less now) but the problem is still there.
I am somewhat handy with electronics so I figured that If I can get some pointers I'd risk the "Super Fantastic Warranty" and actually fix this stupid problem myself. HELP!