GK 2000RB intermittent crackling noise

[Justin Blart]

Almost always there when I fire it up, then goes away, works fine, sometimes it recurs, then goes away again. Infuriating, I love this amp but cannot rely on it for gigs. Help! Had it looked at by "experts", no luck.

 

[agedhorse]

I would recommend giving GK a call. This is not an easy amp to work on, yet is a nice enough amp that getting if fixed right by (REAL) experts is probably worth doing IMO.

 

[Justin Blart]

Hey thanks agedhorse, I appreciate the advice. I remember them not being very responsive some years ago, but I will try them again, who knows?

 

[agedhorse]

Hey thanks agedhorse, I appreciate the advice. I remember them not being very responsive some years ago, but I will try them again, who knows?

My experience is that they have a good service program. Give them a call and see what options they can offer you.

 

[mattwear]

Maybe try a small patch cable from preamp out to power amp in. In some amps this connection needs to be cleaned from time to time, so a patch cable is a good and quick test.

 

[Justin Blart]

Maybe try a small patch cable from preamp out to power amp in. In some amps this connection needs to be cleaned from time to time, so a patch cable is a good and quick test.

Thanks mattwear good tip, I will try that.

 

[funkytoe]

This is exactly right. Early GK 200RB / 400RB /800RB are notorious for this. Sounds like the amp is shorting, but its really just dirty/corroded send and return jacks. Test it with a patch cable. I bet it stops the problem. If so, remove the patch cable, thoroughly clean the jacks with deoxit or other contact cleaner and that amp will be good as new.

 

[Justin Blart]

This is exactly right. Early GK 200RB / 400RB /800RB are notorious for this. Sounds like the amp is shorting, but its really just dirty/corroded send and return jacks. Test it with a patch cable. I bet it stops the problem. If so, remove the patch cable, thoroughly clean the jacks with deoxit or other contact cleaner and that amp will be good as new.

Thank you toe of funk.

 

[agedhorse]

I would assume that checking the effects looks is something the previous "experts" would have already done.