Comments on: Guitar Amp Channel Switching Problem and How to Repair

By: yusuf

yusuf — Wed, 30 Nov 2011 14:39:40 +0000

wooow this is very interesting and very helpful thank you….

By: Gary

Gary — Sat, 27 Aug 2011 14:40:05 +0000

Hi,
With the problems you’re describing, not sure how laying it in the back of the car would cause anything, something was probably ready to go anyway. Make sure all your tubes are in good. Really not much you can do except take it to a shop.

By: John Schauf

John Schauf — Sat, 27 Aug 2011 05:01:49 +0000

Hey man I have a Fender Hot Rod Deluxe. Today it randomly started to have an issue after a drive, it was facedown in the back. The Master Volume knob has no control over the clean channel anymore, the clean channel has a low volume, probably a standared of 3 on the master volume if it would control it but it doesn’t. However the drive channel does work with the Master Control, so I’m really confused. I don’t know what to do and its so frusterating!!!

By: mable

mable — Mon, 23 May 2011 06:14:54 +0000

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By: Gary

Gary — Wed, 11 May 2011 21:13:04 +0000

Hi,

I don’t know, could be the power supply if it’s common to both channels.
Probably shop time.

By: Kev

Kev — Tue, 10 May 2011 20:59:49 +0000

Hi Gary,
I have a Fender Dual Showman Redknob which has developed a loud buzz on both channels. When I select the clean channel, the gain pot on the other channel increases the volume, (and the noise). I cleaned the pots with switch cleaner, blew off the dust with compressed air and sprayed the pcb’s with laquer. The amp sounded sweet with no noise for about ten minutes then the buzz came back.
Could this be something simple or should I take it to a shop? (expensive here in the UK)

Kev

By: joe

joe — Fri, 28 Jan 2011 13:44:54 +0000

hi Gary
this is Joe with the drive channel problem on my vintage blues deluxe.these are the things I did…..
pushed the drive switch numerous times; o.k.
used a foot switch numerous time;o.k.
unplugged the foot switch numerous times;o.k.
left the amp on for 4 hours(about the length of rehearsal)
noticed that when I turn off the power switch,the drive channel goes on( i don’t think that matters,heck,the amp is off).
plugged in my guitar and……..,I could not duplicate the problem
oh ,how I hate intermittent failures.quite time consuming

joe in PA

By: Gary

Gary — Wed, 26 Jan 2011 00:54:10 +0000

That has a pedal right? If so switch the pedal between the ch. a lot, also if you can unplug it and plug it back in a couple of times. Hopefully it’s something simple at this point.

Gary

By: joe

joe — Wed, 26 Jan 2011 00:52:26 +0000

Here’s a problem my fender blues deluxe(1997) just developed.i was playing thru the clean channel when the drive channel light went on and i lost output.then the light would go out and the output would come back.this happened on and off consistently
Any thoughts?

Joe

By: Gary

Gary — Wed, 19 Jan 2011 16:15:09 +0000

Hi,

From what I remember yes. Mainly for the reason for reduced parts in the supporting circuitry on a circuit that is switching the signal path. With that said, in a pedal it might also just be a mechanical switch with circuitry to clamp the annoying pop but keep it quick so you will probably need to look up the exact model schematic.

Gary