Played last night, at ‘soundcheck’ before starting, when plugging into my amp via a BB preamp I had a slight background rrrrrrrrrr noise, when pedal was engaged the nose went up to RRRRRRRRRRR.
Hmm.
Swap pedal to my tubescreamer,
RRRRRRRR.
Hmm.
Swap guitar.
RRRRRRRRR.
Hmmm.
Change leads.
RRRRRRRRRR
Quickly try and unplug lights/plugs to see if that makes a difference (unplug the PA playing backing music, doh !) but no help, I ran out of time to find the fault as I sort out the PA and levels etc and leave my guitar last.
I ended up plugging direct into my amp and used my volume control to clean up (I play with quite a lot of gain) and there was no noise from the amp at all like this.
Any ideas? Pedals were powered by batteries (only one pedal at a time), amp was plugged into the wall (no extension lead or sharing of a multi gang). Leads were good. Gigged same setup last week and was no problem.
Band does use various led type lights and stuff which makes me think hmm, but didn’t have time to unplug them all. Bad wiring ? Why did the noise only present itself when I had two leads and a pedal?
Comments
The only possible electrical fault would be if the socket the amp was plugged into wasn’t earthed. A plug-in mains socket tester with three LEDs will show up things like this and is something worth having for gigging in venues with potentially dodgy wiring...
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
Is this one OK?
It could have been our lights? But we’ve gigged with them all before and never has this problem. I tried to replicate the issue today at home but, nope. Quiet. Weird that there was no noise directly into the amp, but noisy with two leads.
It is a bit odd if you tested the leads, but it may have just been the extra gain from the pedals if it was OK with them turned off.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
Had that before, and after spending about 1 hour replacing every thing in my rig during the setup/sound check turned out that the venue had a hearing aid loop on. got it switched off and voila all good!
I hate it when that happens!