#1
So I was at practice the other day and something really strange was happening. The buzz from my amp got significantly louder when I rolled the volume on my guitar off. I have a killswitch on my guitar cable too and it did the same thing when I pressed that.
I thought it was possibly my cable, but I've tried to recreate this at home and it isn't doing it.
I think I may potentially have a bad tube, but I'm also thinking it's the electrics at the rehearsal studios that might have caused it?

Anyone with a similar issue?


Equipment is:
Fender 2003 American Standard Strat
Vox AC15c1 (a newer model roughly 3 years old)

I have a pedal board between the two but I don't know if that would affect it. I set up at home with all the same stuff, same settings etc and it wasn't doing it.
#2
Unplug the guitar input at the amp. Does the buzz go away? You may have a ground issue. Try keeping one pedal out of the chain one at a time. If that pedal can take a battery, try one. It can take a while of unplugging one thing and then the other until the sound goes. The grounding issue usually comes from the fact that the amp is plugged into a circuit that isn't the same ground as the one the pedals are in. It can also be a problem when the ground is questionable in a venue. If the same rig doesn't do it at home, you can bet, this is likely your issue.
#3
GoldJim That's most likely it. When I was in the rehearsal room my amp was plugged into one socket and my pedal board was plugged into an extension cord in another socket on a different wall. I'll try them both in the same socket next time and see if that helps, and I'll try unplugging the cable from the amp too. I didn't really look around much at the time as I assumed it was my cable that was fucked and we were in the middle of a band practice so I didn't want to be messing with my gear.
Thanks for the reply.
#4
Good luck. If the power is crap, you might consider renting a power conditioner. It's (usually) cheaper than blowing out your speaker. You can get one used for $50 http://www.guitarcenter.com/Used/Furman/M-8X2-Power-Conditioner-112855369.gc?cntry=us&source=4WWRWXGP&gclid=Cj0KEQiA56_FBRDYpqGa2p_e1MgBEiQAVEZ6-zZb7EInW6v3iAzZX-Az9FuC7ZG9w1b8WnQV_JCF2TgaAlox8P8HAQ&kwid=productads-adid^66736785762-device^c-plaid^135210426522-sku^112855369@ADL4GC-adType^PLA or new for about $80 http://www.musiciansfriend.com/accessories/furman-m-8x2-power-conditioner?cntry=us&source=3WWRWXGP&gclid=Cj0KEQiA56_FBRDYpqGa2p_e1MgBEiQAVEZ6-_MkqbvK00eaMdAgOqIwVkYGMbC94_8gqShnsw9FttIaAtXX8P8HAQ&kwid=productads-adid^156403583515-device^c-plaid^265910349751-sku^712515000000000@ADL4MF-adType^PLA. The front only shows one outlet, but there are 8 on the back.

edited to add: there are cheaper models, but I've always been a Furman user. When it's not powering my rig, I use it at home for my home theater.
Last edited by GoldJim at Feb 21, 2017,
#5
GoldJim Right we were at the studio again this week and I made sure my pedal board was plugged into the same socket as my amp. Same issue. Unplugged the cable directly from the amp and the noise stopped. So I guess it's not the amp, but that still doesn't explain why I've had no issues with the exact same set up at home :/
#6
Not all homes are built the same. If the place your practicing doesn't have a good or consistent ground in the wiring, that can explain it. Unfortunately, without an electrician and some work behind the drywall, you may never know. It's why when I gig, I use a Furman. I never know if the place has good power, and one brown out can eat thousands in gear.
#7
GoldJim I think you are right about this. We used a different room today and when I had both my pedals and the amp in the same socket all was fine. As soon as I plugged the amp into a different socket to the pedals I got a load of noise.

Now to find a UK Power Conditioner!
#8
Yeah, I checked Anderton's site, and it was pretty danged expensive! £495.00. Guitar Guitar didn't even have on listed! I found one for €115, but you would probably have to mail order. Should be able to get in that cost range.