My brother bought a house 2 years ago, and remodeled the basement. Older house, no ground wires on the overhead lights. We rewired just the wall sockets with grounds, grounded at the box. 6 outlets along one wall, and the ground at the last outlet is also attached to the incoming water pipe. Did not do overhead lights, as ceiling tiles nailed up. His band had a practice there Monday, and the 60 Hertz buzz was unbearable. I went there today to see if a bad ground existed and maybe do some testing. All wall socket wiring is good and correct. Here's where I am stumped. None of the amps buzz at all without inputs applied, even at max gain. (all amps are pro grade, no cheap stuff). plug a guitar in, and crank up the gain, unbearable buzz. Seems to be depending on where and what orientation you are holding the guitar. High end guitars, new pro grade cables. Also, plugging in a cable to any amp, without a guitar, generates a buzz. Bring it near an overhead light, on or not on, the buzz gets much louder. Same goes for any ungrounded device in the basement, on or not. Put a Klipsch Heresy speaker near the wall wiring, no leads attached, it will buzz. There are dead spots, where you can hold a hooked up guitar, with very little buzz. What to do next? They have never had this problem when practicing any where else. They have been together about 25 or 30 years, and know their equipment, none of it , other than some of the guitars, are older than 5 years, and it is all high grade stuff.
- posted
13 years ago