Fender Princeton Reverb Squeal

Completed amps from Fender, Orange, Hiwatt, Vox, etc.

Moderator: VelvetGeorge

Post Reply
rcol1325
New Member
Posts: 10
Joined: Wed Mar 24, 2010 8:03 pm
Just the numbers in order: 7

Fender Princeton Reverb Squeal

Post by rcol1325 » Sun Apr 17, 2011 12:37 pm

I'm working on a late 60's Fender Princeton Reverb, and am getting a loud squeal when I turn up the reverb approximately half way. I have tried tapping, pulling, swapping, and replacing the preamp tubes with no success. I do notice, when I turn the reverb knob to just before the point of squeal, I can tap the caps near the first preamp tube and get some popping. Has anyone had similar issues? I'm kinda stumped. Possibly a bad solder joint?
Top
User avatar
Mars Hall
Senior Member
Posts: 955
Joined: Mon Dec 17, 2007 9:49 pm
Just the numbers in order: 7
Location: The Region, NW Indiana

Re: Fender Princeton Reverb Squeal

Post by Mars Hall » Mon Apr 18, 2011 6:53 am

rcol1325 wrote:I can tap the caps near the first preamp tube and get some popping. Has anyone had similar issues? I'm kinda stumped. Possibly a bad solder joint?
The way you describe it does sound like a cold solder joint, couldn't hurt to reflow some connections in that area.
"You just slide a bottle up and down til what you want out of it comes out. You just slide away at it til you've got it down." Duane Allman
Top
rcol1325
New Member
Posts: 10
Joined: Wed Mar 24, 2010 8:03 pm
Just the numbers in order: 7

Re: Fender Princeton Reverb Squeal

Post by rcol1325 » Mon Apr 18, 2011 3:58 pm

Yup, broken solder joint. I retraced my steps, and pulled tubes again. Isolated the problem on the reverb recovery tube. And, finally found that pesky little solder joint which was a ground reference for the cathode resistor on that tube. Should've been more thorough when doing voltage testing, and I would've caught it sooner. Thanks for the response.
Top
Post Reply

Return to “Other Amplifiers”