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What Did I Fry On MY Head ?

LevinFan

LevinFan

Aug 4, 2008
255
0
Louisville Ky
#1
My GK head I mean :D

Humor aside,

I purchased a new 700 RB II a few weeks ago, and I love it.

No problems at all until I forgot it was on, and I unplugged the cable from my bass when I went to move it. Ugly to say the least. I know better, but stuff happens

Still sounds fantastic, but when not playing, I'm now hearing intermittent noise, somtimes a sizzle, sometimes popping. Not loud, but it's there. Also, when it powers up, I hear a slight thud when the light goes from red to blue. Same when I turn it off.. a slight pop or thud.

It does it no matter what settings the controls are, and also when the tuner mute is engaged. Even when no guitar cable is connected when turned on, it does it.

So, my question is, what did I fry when I accidently pulled the cable out of the guitar ?

Again, there is no evidence of a problem performance wise. It still sounds great. I have no regrets. I'm hitting a 212 neo 4 ohm cab rated at 500 watts with the 700 RB, and haven't even pushed it hard enough for the fan to kick on yet.

I assume it's not the cab woofers or tweeter. I can easily check by running a line to a powered speaker if anyone advises to do so.
 
#6
Chinguschild said:
Possibly the cable? I dont know. My head always does it. So I wouldnt know.

edit: To be clear I dont own a GK head.
Click to expand...

Definetly not the cable. Does it without a cable plugged in.


Rune Bivrin said:
My guess is absolutely nothing, it's just that you're listening more carefully because you're worried. The sizzling and popping is probably interference from appliances in the vicinity.
Click to expand...

No, it wasn't there before.

No biggie, I appreciate the input guys.
 
#7
bongomania said:
Possibly a solder joint that was weak to begin with has now gotten looser. It might not even have anything to do with the one time you unplugged the bass while it was on.
Click to expand...

You might be right. I just inserted a cable into both effects loop inputs a few times. I was using them for the first time when it happened, and your idea made me try it. Inserted the cable and wiggled it a tad.

I've had it back on for about ten minutes now, and it's not doing it. First time it hasn't , and I've had it turned on about ten times since it started doing it.

I turned it off when I began this reply, and just turned it back on. No noise.

Friend, you may have saved me a few bucks shipping costs to a service center. Thanks man.

TB'rs rock :bassist:
 
#8
T-Bird said:
Hi.

I'd vote for dirty electricity, nothing to do with the unplugging the cable while the head was on.

Try another outlet circuit (if any) or another location.

As for the thud, try SWR, You'll **** your pants ;).

Just my 0.02€
Sam
Click to expand...

Yea, it's on a circuit without any appliances running off the circuit, and it's grounded fine and all.

See my reply to bongomania above. I think I fixed it. Life is good again :bassist:
 
#9
Yes, probably just dirty contacts in the effects loop jacks. Inserting the cord cleaned it temporarily. If you leave the cord in it bypasses the on/off switch on the jacks and you get a clean signal path. I had that problem with a 400RB, but severe to the point where the signal would cut out completely. I just left a short jumper of instrument cable plugged in.

You might want to get in there and clean the contacts thoroughly with a good contact cleaner minding also the little tab that is the switch. Shouldn't have that problem again for a long time.

It can happen with a lot of different amps with the same type of effects loop.
 
#10
62bass said:
Yes, probably just dirty contacts in the effects loop jacks. Inserting the cord cleaned it temporarily. If you leave the cord in it bypasses the on/off switch on the jacks and you get a clean signal path. I had that problem with a 400RB, but severe to the point where the signal would cut out completely. I just left a short jumper of instrument cable plugged in.

You might want to get in there and clean the contacts thoroughly with a good contact cleaner minding also the little tab that is the switch. Shouldn't have that problem again for a long time.

It can happen with a lot of different amps with the same type of effects loop.
Click to expand...
Ok, thanks. It's a brand new head, so it may be a solder issue as well.
But it's fine now, and I've got a new 1 foot jumper just in case.
 
#11
Sorry!!! It's a BRAND NEW amp purchased a FEW WEEKS AGO! If the thing is giving you trouble or you are in doubt about anything about it TAKE THE DAMN THING BACK AND GET A DIFFERENT ONE!!! Problem solving is for those used purchases that fail us not new fully warranted items.

Good lord man, you just laid out a goodly amount of cash for an amplifier that should give you years of problem free service not weeks. RAG make good amplifiers that he is proud of and even he will tell you the same thing.

Pulling a cord out of an amp while it is on should not damage anything. Like most of us, I've done this a few million times without a thought!

Paul
 
#12
BassmanPaul said:
Sorry!!! It's a BRAND NEW amp purchased a FEW WEEKS AGO! If the thing is giving you trouble or you are in doubt about anything about it TAKE THE DAMN THING BACK AND GET A DIFFERENT ONE!!! Problem solving is for those used purchases that fail us not new fully warranted items.

Good lord man, you just laid out a goodly amount of cash for an amplifier that should give you years of problem free service not weeks. RAG make good amplifiers that he is proud of and even he will tell you the same thing.

Pulling a cord out of an amp while it is on should not damage anything. Like most of us, I've done this a few million times without a thought!

Paul
Click to expand...

Hey Paul, well I guess that is the route I'll have to take then, because it's doing it again, and it's getting worse.
 

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