Peavey Bandit 112 - Please help! I’ve broken it...

powerhand

I was dicking around with the various sockets on the front of my Peavey Bandit 112 Silver Stripe (a 90s transtube one). I stuck a lead into the ‘EFX Loop Return’ and when I pulled it out, there was a loud pop. Since then there has been a low volume scratchy, crackle in the background. It goes away when I switch to the lead channel, so only affects the clean channel. 

Does anyone have any ideas as to what I’ve buggered and whether it can be fixed?

cbilly22

Possibly a fault with the loop jack connections. I'm sure I read @ICBM mention that they end up failing due to never actually being used. The man himself will be along soon as the thread title will lure him like a moth to a light

ICBM

cbilly22 said:

Possibly a fault with the loop jack connections. I'm sure I read @ICBM mention that they end up failing due to never actually being used. The man himself will be along soon as the thread title will lure him like a moth to a light

lol

Your @ did, anyway .

That does sound like quite an odd problem, and not one I've come across. Although it has to be said that faults on these are extremely rare...

The reason it's so odd is that there are no components in common between the clean channel and the FX loop, and any fault in the FX loop circuit should affect both channels equally - it's not even that it operates at different levels for the two channels, it's the same.

Is the noise affected by the tone controls on the clean channel?

Danny1969

I had one in the workshop last year that did that ... took the board out, did every joint on it, put it back and fault still there .. found it in the end it was the effects loop jacks not closing properly

Try a short lead in the loop 

ICBM

Danny1969 said:

I had one in the workshop last year that did that ... took the board out, did every joint on it, put it back and fault still there .. found it in the end it was the effects loop jacks not closing properly

I thought it might be that, but it's odd that it causes noise only on the clean channel - that made me think it wasn't.

But trouble with the FX loop jacks is one of the only things that goes wrong with them, so it doesn't entirely surprise me.

powerhand

I’ll try tomorrow and report back - thanks. 

RobDavies

Similar thing happened to a Carslbro Bass combo I had.  It would only work if there was a lead between the sockets in the fx loop. 

sweepy

Randall modular amps are like that too, the red loop can be a pita and are usually fixed by either a patch lead or plugging something into it

powerhand

It seems that it does affect both channels and putting a patch lead from EFX send to return doesn’t stop the crackling.

ICBM

powerhand said:

It seems that it does affect both channels and putting a patch lead from EFX send to return doesn’t stop the crackling.

Does the FX level switch change the amount of noise?

powerhand

ICBM said:

powerhand said:

It seems that it does affect both channels and putting a patch lead from EFX send to return doesn’t stop the crackling.

Does the FX level switch change the amount of noise?

Unfortunately I don’t have the FX foot switch. 

ICBM

powerhand said:

Unfortunately I don’t have the FX foot switch. 

Not the footswitch - the level switch on the front of the amp. (Actually marked 'EFX Level' now I've looked at a pic!) If the noise is coming from the FX loop send/return IC, that should alter the level of the noise.

powerhand

ICBM said:

powerhand said:

Unfortunately I don’t have the FX foot switch. 

Not the footswitch - the level switch on the front of the amp. (Actually marked 'EFX Level' now I've looked at a pic!) If the noise is coming from the FX loop send/return IC, that should alter the level of the noise.

Ah, gotcha. I’ll have a look once I’ve finished doing phonics with my 5 year old. 

powerhand

It seems to have resolved itself. I had an Amazon Echo Dot which I’d recently moved on to the top of the amp. I moved it away this afternoon and the crackling has gone - WiFi interference?? 

ICBM

powerhand said:

It seems to have resolved itself. I had an Amazon Echo Dot which I’d recently moved on to the top of the amp. I moved it away this afternoon and the crackling has gone - WiFi interference?? 

That sounds quite possible!

powerhand

ICBM said:

powerhand said:

It seems to have resolved itself. I had an Amazon Echo Dot which I’d recently moved on to the top of the amp. I moved it away this afternoon and the crackling has gone - WiFi interference?? 

That sounds quite possible!

Yorkie

Fishing this out of the depths of the forum to add my own experience. 

I was recording something with the Bandit, and then all of a sudden this LOUD %**+*****^%%##?!!?!!!!!!! gives me a mini heart attack and fucks the recording completely. Came to the forum and saw this comment by @powerhand ;

The phone. I had left the goddamn mobile phone on top of the amp