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G50 Signal Noise


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#1 Halfawhopper

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Posted 01 May 2013 - 07:38 AM

With guitar volume rolled back to zero and transmitter on, my G50 creates a continuous background signal noise when plugged in to Marshall 410 Amp on gain channels. This noise is completelely absent when plugging guitar direct in to amp by cable (and can not be heard on clean channel). I am using EMG 81 and SA active pickups. Please help


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#2 dboomer

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Posted 01 May 2013 - 08:38 AM

Hard to guess as to whether you actually have a problem or you are just experiencing normal operation.

 

First most common problem is a ground loop caused by not having your amplifier and your Relay poser supply plugged into the same power strip.  Is it?

 

Also.. does it make the same noise if you don't plug a cable into the transmitter but otherwise power up the system?

 

Once you get past a ground loop issue ... The wireless system does make some noise (all electronic devices do) but it is very very low ... way lower than any other wireless system.  When you plug into a very high gain guitar amp channel you are amplifying that small noise component.  You could try plugging the receiver into a PA mixer and checking for noise there.  If it is quiet in a mixer but noisy in your amp it's just the gain factor of your amp.



#3 Halfawhopper

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Posted 03 May 2013 - 03:12 AM

Thanks very much for your help. I will go away and try a few things.

 

The noise is consistant whether plugged in to same power strip or differenct supply source. I will try in the PA and see what the results is.

 

I agree with you, though, its definatetley the gain factor which amplifies; but it is really instrusive. I have tried noise gating it out, but this turned it to a loud hiss (which, granted, may be a reflection of the gate rather than anything else). I've also put the gate post pre-amp - but have to max out the threshold to overcome. Live, the way I contol it is to step out of gain channel at any point where I am not playing - rolling the guitar volume off isn't an option. Just plugging a lead straight from guitar to amp cures all - but its not what I'm looking for.


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#4 Halfawhopper

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Posted 30 May 2013 - 10:05 AM

Diagnostics are complete: 2 problems:

 

1. Dodgy G50 cable (guitar to pack). Seems to be a problem with wire where it feeds in to 4 pin socket end

2. One spot power supply on effects.

 

SOLUTION

 

1. Upgrade to premium cable

2. Voodoo labs pedal power 2 +.

 

Will let you know if it works when done.


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#5 dboomer

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Posted 30 May 2013 - 12:02 PM

When using the VooDoo Labs unit you must use the "current doubling" cable on the 5&6 outs.  Make certain you have the proper cable as the "voltage doubling" cable looks identical but is not the right piece.

 

Of course a quicker check could be made by using the factory supply to test with.






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