Topband: Electric fences
Jon Zaimes AA1K
jz73 at verizon.net
Wed Dec 28 01:48:20 EST 2005
I have had electric fence noise from 8-10 miles away.
It usually comes in two forms.
One is a steady or intermittent tick, tick, tick .... the sound of the make/brake switch in the fence charger (the fence itself unfortunately serves as the antenna).
The other is a pulsating hash, created when the fence wire arcs to ground (if the wire stretches or breaks), to vegetation that has grown close to it, or at a poor splice in the fence wire.
I've never traced RFI to a digital clock. The only other tick, tick noise I have observed similar to the first fence noise is at a flashing traffic light a mile and a half from my house. But I never hear that at the home station, even with a Beverage pointed at it. I only hear it when I drive right under it with my mobile rig.
The pulsating hash fence noise may sound similar to power line noise, but is distinguished by the regular pulsing of the fence.
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