Footswitch cause distortion? Two Channel H

[fradubio]

Hi Folks,
I have a new to me Two Channel H head from 2012. It sounds great, but when I plug a two button footswitch (Hosa, no leds) I can switch channels and turn reverb off, but there is a farty kind of distortion like the speaker is flubbing out.

I unplugged the footswitch and it sounds back to normal.

Anyone have any suggestions?
Thanks,
L.

 

[László]

Possibly you need either a proprietary footswitch or a different cable?

 

[fradubio]

Possibly you need either a proprietary footswitch or a different cable?

Hmm, I'll try a different cable. I'd be surprised if there's a proprietary footswitch for the 2 Channel H.

 

[dmatthews]

Is the cable TR, or TRS?

 

[fradubio]

Is the cable TR, or TRS?

The cable is TRS / Stereo so I can use both switches.

 

[Buildermike]

I have both the two channel H and C amps. I only have one switch that was included with the purchase of the C amp. I have not found a third party switch that works properly with my PRS amps. I don’t know why. Maybe someone at PRS can shed some light on the compatibility issue.

 

[dmatthews]

Check this thread...

https://forums.prsguitars.com/threads/prs-dual-channel-h-replacement-foot-switch.24907/

 

[fradubio]

Check this thread...

https://forums.prsguitars.com/threads/prs-dual-channel-h-replacement-foot-switch.24907/

Yes, thanks. That’s the thread that let me know I could order a generic 2 button no led switch.

 

[dmatthews]

Yes, thanks. That’s the thread that let me know I could order a generic 2 button no led switch.

H... maybe you can get the wiring info, or a replacement switch that works from PTC?

 

[fradubio]

Argh. Never mind. Now the whole amp is kaput. Clearly, the fuzzing was a symptom of something else failing and the footswitch was just a coincidence.

 

[dmatthews]

Argh. Never mind. Now the whole amp is kaput. Clearly, the fuzzing was a symptom of something else failing and the footswitch was just a coincidence.

Rats!
Maybe it's just a tube thing.

 

[Buildermike]

Yep, try replacing the power tubes first then working down to the others. I know it's a PITA, but a cheap trouble shoot. After that I would contact the PTC for a repair, much cheaper than sending it elsewhere.

 

[fradubio]

Had my tech go through the amp. He found a few cold solder joints and addressed those, changed the switching diodes and capacitor, changed one of the preamp tubes, and she's back in action!

I'm a little nervous and may take a backup if I play out with it for a bit... but so far so good!

 

[dmatthews]

Gig that baby!

 

[fradubio]

Shucks, now the reverb is intermittent. Back to troubleshooting.

 

[Buildermike]

It might be the reverb transformer. I had that issue in the C channel amp.

 

[fradubio]

Easy fix... reseated reverb cables and all is good!