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Very strange amp hum behavior
Old 9th September 2011
Lives for gear

Very strange amp hum behavior

The amp is a roland cube 30. I opened it up and it looks like a computer in there!

Problem is hum. There is some 60hz hum + very annoying high pitch hum/buzz when I plug my guitar cord in there (with no guitar) or with a guitar. Hum is out when I unplug everything.

When I plug the guitar chord only and I touch the metal casing of the guitar cord, I get amplified hum/buzz.

I have a show tomorrow... if anyone can help!
Old 9th September 2011
Lives for gear
Radardoug's Avatar

The problem is not your amp. It is your guitar or cables.
Old 9th September 2011
Lives for gear

I have tried guitars that work perfectly in other amps and I have used different cords that work great with other amps too.... What could be the problem?
Old 10th September 2011
Here for the gear

Probably a bad ground connection somewhere that's not as amplified through your other amps
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