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Author Topic: help! major RF and noise on guitar rigs  (Read 5577 times)

Keith Broughton

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Re: help! major RF and noise on guitar rigs
« Reply #10 on: June 30, 2011, 08:24:42 am »

Thanks for all the input.
It's not hum but rather RF noise that is being picked up.
It's the single coil pick ups that are the worst and some of the guitar techs are bypassing pedals that cause the most problems. Much cable coiling has been tried as well.
Since I posted the question, I have found that there is a large power substation about 100M from Metro Square.
However, last night, the problem was minimal.
Modifying incoming guitar amps is not an option but I will pass that idea along to the back line guys.
As it turns out, it's unlikely the festival will be back at this location next year and return to Nathan Phillips Square. The radio station is the only problem there.
I am in the process of identifying which local radio broadcast station it is and then can determine the frequency. I suspect either AM 530 or 1050.
At that point, I might be able to design a filter to kill it.
This problem has filtered into the com system as well as an Avalon active DI.
Seems like any unbalanced line is just a big antenna.
Now where did I put that foil hat....
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Re: help! major RF and noise on guitar rigs
« Reply #10 on: June 30, 2011, 08:24:42 am »


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