Stompboxes create noise in my amp when plugged in, on or off

[hominyguitars]

I have a solid state Brownsville Choirboy Amp which has great sound and a fairly decent chorus and reverb on it. I have other amps but this one is consistently the best for

playing with a group.

I use the clean channel and every time I try to plug in an FX device (delay, tremolo, vibrato or octave pedal) it creates low volume intermittent noises in the amp.

This happens whether or not I pug into the input jacks (1 is high gain, 2 is low gain) or go through the send/receive loop on the back of the amp and once I turn on the FX box, it makes noise even after I turn the device off.

Is there a simple solution to this problem, like maybe putting a capacitor from the chassis to ground terminal on the input jacks?

It is a solid state amp made for Sam Ash and has 2-10 inch speakers.

If anyone knows the solution for this problem, I would be most grateful.


Steve

[ashcatlt]

Can you post a sample of the noise, or at least describe it a little better?

Pedals have batteries or wallwart power?

Tried a different cable?

[b4nj0]

Does it with all effects boxes, so it's not going to be down to them, but ash's hint about the psu is germaine.
Does it even if you bypass the preamp so it's not that.
I don't suspect the power amp stages because they are soundly buffered from the input by the preamp circuitry, which as I said is probably not to blame.
Capacitor from chassis to ground terminal will do nothing except invalidate any warranty that you might still have. I'm sure that signal to chassis ground is what you meant, but that might also roll away some shine off your tone and is probably a red herring.
My questions: once it starts to make the noise, even if you turn the effect off, does it still do it if you turn off the amplifier and then turn it on again with the effect(s) still turned off? Also, does it happen with the guitar left on a stand as you stomp on and off (ie!, no cable movement at all) and then again, what about with just the effects connected and no guitar and lead plugged in? All probably irrelevant, but it helps to rule out as Sherlock Holmes is supposed to have said because that which is left must be the culprit!
I'll go with ash for now, focus on the cable first, but it does seem illogical.

[hominyguitars]

Thanks a lot; I will check the cable out first and perform the tests you suggest and then get back to you on it.

Boxes were all battery powered, not powered by wall wart.

I will try plugging the amp in into a different outlet in the wall as this may have something to do with it.

Best,

Steve

[hominyguitars]

The stompbox is defective.

Maker is replacing the unit.

[b4nj0]

Sorry, I figured from your OP that it affected all of your stompers. I enjoyed the puzzle though. Great that you got it sorted!

Sent from my Nexus 7 using proboards

[hominyguitars]

Thanks for your input, everyone.

I called Behringer and they are sending a new unit.

Check out www.partsexpress.com for great prices and some cool stuff for audio projects, replacement speakers and other gear.

I've been dealing with them for over 20 years and they are a great company plus good tech support if needed.

Best,

Steve