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Vintage threads from the first ten years

Shocking Chassis

4/17/2000 2:13 AM
Eric Eisenhower	Shocking Chassis Ok, help out a new guy here. I picked up this Gibson GA20-RVT for cheap with a really bad LOUD hum. It is unusable in the current state. Of course, I don't know what I'm doing and a having some problems. What I do know is that if you touch the chassis, you can get a bad shock. It put a VOM between the chassis and the ground socket in the wall, and I am getting about 7 volts AC. The amp has a two prong plug. Any ideas about how to diagnose this? I disconnected one side of the filament line from the xformer, and we still have it. Should I try to hack the other side off too? Thanks for the help. I'm burning up parts trying to figure it out on my own. -e

4/17/2000 2:13 AM

Eric Eisenhower

Shocking Chassis

Ok, help out a new guy here. I picked up this Gibson GA20-RVT for cheap with a really bad LOUD hum. It is unusable in the current state. Of course, I don't know what I'm doing and a having some problems.

What I do know is that if you touch the chassis, you can get a bad shock. It put a VOM between the chassis and the ground socket in the wall, and I am getting about 7 volts AC. The amp has a two prong plug.

Any ideas about how to diagnose this? I disconnected one side of the filament line from the xformer, and we still have it. Should I try to hack the other side off too?

Thanks for the help. I'm burning up parts trying to figure it out on my own.

-e

Replies:

Ethan W I'd look for anything shorted to ch... -- 4/17/2000 2:49 AM
Marc EricCheck and replace the g... -- 4/17/2000 3:33 AM
Don Symes Definitely replace the 2-wire cord ... -- 4/17/2000 5:19 PM
R.G. Read the Tube Amp Debugging Page fo... -- 4/17/2000 7:10 PM