1965 Princeton Reverb problem?

[Jasonpatrick]

Is this normal for these. This buzzing sound. I feel it shouldn’t be. It’s had a full recap. CE can replacement. When I wire a 20uf cap in series with the Triangle node on the cap can it disappears until higher up on the reverb dial. If I remove the wire off the node and just through the 20 uf cap it’s back. So I don’t think it’s the can. Makes the noise without tank hooked up, with tank removed, turned around , upside down and ten blocks away. Jkjk.. I have looked and read about similar issues but the threads all just end before anyone is like hey , this is what I did. All voltages are well within spec. This guy is running GZ34 and has the AA764 tube chart. I know I know… I think some of it is my apartment but I wanted to see if any of you had any thoughts. Turn up your volume! I’m all ears!View media item 48257

 

[Jasonpatrick]

I’ve moved wires around changed tubes cleaned jacks ect etc.. reflowed suspect solder, yada yadda

 

[JDRNoPro]

Sorry but I can't really get a feel for how loud that hum actually is. A slight low level hum wouldn't seem unusual to me.

You might have better luck with this over on the amp tech center subforum. Good luck!

 

[Jasonpatrick]

Sorry but I can't really get a feel for how loud that hum actually is. A slight low level hum wouldn't seem unusual to me.

You might have better luck with this over on the amp tech center subforum. Good luck!

Sweet. I posted over there just now. Can I get a Mod to delete this post? Thanks!

 

[TwangerWannabe]

None of my silverface Princetons ever sounded like that.

The obvious things I'm sure you've already ruled out...is it near any appliances, monitors or fluorescent lights? Do you actually have a guitar plugged into it when this is happening, and if so have you tried other guitars to rule out it's a specific guitar and not the amp?

 

[Jasonpatrick]

Tube pulled no change. Tube pulled and reverb output rca pulled only, buzz disappeared