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Re: Interference from electric fence?

Subject: Re: Interference from electric fence?
From: madl74
Date: Thu Jun 6, 2013 5:20 am ((PDT))
> Thanks everyone for your responses to this.


The problem will most likely be from RF interference. Audio balanced lines 
are often not balanced for RF, and it gets through into the digital 
circuitry high frequency stages, it will interfere. 

Encasing the recorder in a shield in unlikely to help. Mic cables should be 
a braided or conductive rubber screen type, not helically screened. See if 
you can minimise the interference by moving the cable about or looping it. 

A spark anywhere in the fence circuit will generate RF, even if the fence 
unit isn't doiing that. If you can. listen along the fence run for any 
sparking and close the gap or insulate it out. 

An RF filter box on the recorder input could work, but that is an 
engineering job with no guarantee of working. If you can get hold of a large 
toroidal ferrite shield to get a half tun or several turns of the mic cable 
through it, that might just help. 

If all else fails, it is possible to edit out the clicks with a small loss 
of the wanted rercording. 

David Brinicombe 

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