Amplification weirdness

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Miguel de Maria

Posts: 3532
Joined: Oct. 20 2003
From: Phoenix, AZ

Amplification weirdness

So I was playing this corporate background gig last night. Moderate volume, but not quiet; my AER was putting out some sound. I detuned the 6th string to D to play some Brazilian pieces--and all of a sudden I notice a hum coming from the amp. I touch the cord where it plugs into my guitar and the hum disappears. It's some sort of ground hum, right? When I touch the metal it stops, when I take my hand back, it starts again. I mess around with my cords, but the hum will not stop. I suppose it is because my amp is plugged into an extension cord using a 2-pole adapter, but when I unplug my amp (it has battery), the hum continues. WTF? On the other hand, I do have a Ditto looper plugged in, but it is supposedly true bypass.

When I finish the D pieces and tune the 6th back up to E, the hum goes away, and does not return.

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REPORT THIS POST AS INAPPROPRIATE | Date May 21 2014 16:07:31

Morante

Posts: 2184
Joined: Nov. 21 2010

RE: Amplification weirdness (in reply to Miguel de Maria)

Hola Miguel

I have a friend who is a professional rock guitarist in Dublin and used to play lots of pubs, hotels etc. He had so many problems with poor quality electric connections that he changed all his Strats to EMG active pickups and uses an insulator between the house plug and his ampli.

Sometimes you blame your equipment when the problem is elsewhere