Crate GX130C guitar amp cuts in and out

[racefan56]

Over the past month or so my Crate GX130C guitar amp has started to cut in and out and it does this every few minutes. The amp has two speakers on it and most of the time (90%) only one of the speakers cuts out and its always the same one. It doesn't matter which channel you play on either it'll cut in and out just the same. I've tried using different guitars, cables, and also removing all effect pedals and its still doing it. Any suggestions on what else to test to pinpoint the problem is greatly appreciated.

Thanks!

[booj]

If you have one bad speaker, it's possible that sometimes the noise created by that bad spelaker won't affect the other speaker.
Is this a stereo amp? If it is, then re-solder the output section jacks,and while your in there re-solder all the jacks and main power supply caps.

[racefan56]

Thanks for the reply, and yes it is a stereo amp. I'm not very knowlwedgable of soldering, am I suppose to just resolder the jacks and caps the way they are sitting in there even if they look to be fine or am I suppose to break the current solder and then resolder them?

Sorry for the dumb questions.

Thanks again

[acorkos]

cutting in and out sounds like a loose component on the PCB...check all the components with the amp running, poking with a wooden (non-conductive) probe. pay special attention to the tall electrolytic capacitors and large cement resistors. tall components can swing a lot when the amp is being jostled in a truck bed or if it has casters and is being rolled through parking lots. the big cement resistors heat up a lot and can cause the solder joints to weaken

[booj]

sorry for the confusion. Generally, I just heat the joint and apply just a tiny bit of new solder. Just enough to get a little bit of rosin from the solder to help with flowing the solder around the joint.
If the joint looks a bit dirty from heat, I use solder wick to suck up the old solder and then clean the connection up by (gently) doing a little scraping with a knife. Then re-flow some new solder onto the joint

[racefan56]

Thanks for the tips, I'm going to try and work on it next weekend hopefully it is just something that needs to be re-soldered.

Thanks again!