Man do I know this feeling. Last time I plugged my Heartbreaker in, all I could hear was the hum of the fluorescents. Go figure, I'm an electrician too. It's like the mechanic's car that doesn't work because he's too busy trying to earn a living.
In the last 8 years, since I got married and had kids, I have gone through at least 20 amps and 12 guitars.
I knew it wasn't the gear that kept letting me down, it had to be me, but I kept searching anyway.
I've narrowed it down to:
66 Fender Pro Reverb
DC-3B combo
DC-10 combo
Heartbreaker head with Lonestar 2x12 cab and Hellatone 60L's
A few homebrew amps
PRS Custom 22 - Duncan Custom 5 in the bridge and Alnico II in the neck
PRS McCarty - stock
Now that I've decided on what I really like, I have decided to build a recording setup.
This means that I have to sell something. I have a US Strat Deluxe and a Warmoth guitar that I never use, so they are 1st.
It could be worse, I could be Trainspotting.
Here is a cheap way to tell if your plug is wired right. It will not tell you about voltage drops, but it will give you polarity and whether or not you have a ground.
http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10051&langId=-1&catalogId=10053&productId=100062242&N=10000003+90401+501516
Another possibillity, if there is something in your power, is that there is a motorized device or fluorescent lighting on the circuit you are using.
I plan on isolating every plug in my music room with a dedicated circuit. I have 3 panels in my house, so it will not be hard to do. This way, I know without a doubt that it is me sucking, not my gear. :lol: :lol: :lol: