Amp Trouble! Fender 65 Deluxe Reverb

[SemperRhythm]

Over the past week or so my Fender Deluxe has been acting up. After warming up and turning on the main power, I can play anywhere from 2-5 minutes before the amp starts popping. It kinda sounds like a bad guitar cable popping, but it's not the cable(s). I ran direct with a several cables including a brand new cable and it did the same thing. A couple times the volume began dropping and coming back.

Any idea what is wrong??? Good news is it is still under the 5 year warranty since I only bought it a year ago so I can just carry it back to the guitar shop. I'm just curious if this sounds major...

???

Nathan

 

[Gearjoneser]

Re: Amp Trouble! Fender 65 Deluxe Reverb

Buy a whole set of tubes, including rectifier. Or if you have spares, start switching out the power, pre, rec one by one, to pinpoint the problem.
If it's not tubes, it's likely to be a capacitor. On a newish amp like that, it's probably the tubes.

 

[Stratman]

Re: Amp Trouble! Fender 65 Deluxe Reverb

Sounds like grid resistor is letting too much voltage hit your power tubes or a tube is getting ready to blow.

Is it motorboating, if so then it's a filter capacitor.

 

[ES350]

Re: Amp Trouble! Fender 65 Deluxe Reverb

Really no way to tell what this is from a distance but it could be something as simple as a bad input jack or a bad solder joint (pretty common in these amps)...get it checked out before you drop coin on tubes.