[CW] electric fence qrm

Fri, 11 Jul 2003 7:52:40 -0400

And if the ticking is not regular, it's probably some blades of grass contacting the fence and momentarily shorting it out.  That problem can be solved by keeping the grass trimmed away from the wires.  

> 
> From: "rb" <[email protected]>
> Date: 2003/07/11 Fri AM 12:58:46 EDT
> To: <[email protected]>
> Subject: [CW] electric fence qrm
> 
> Probably a tough job to get rid of that noise.  If the "ticking" sound is
> regular, it's a weed cutter function of the electric fence charger.  What
> they do is keep a steady state charge on the wire, but also send a really hi
> voltage pulse periodically to burn off wet weeds which fall on or get across
> the fence and tend to short out the lower voltage steady state charge.  They
> do it with an ingenious spring loaded flywheel which rotates to close a set
> of points of a second coil, and when those points break, the flywheel
> recoils and the spring that is tensioned then cause a repeat of the cycle.
> It does this until someone turns the thing off.  Those weedcutters will
> knock a big steer on his rump.  You really don't want to touch an electric
> fence with a weedcutter charger on it.
> 
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