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The open wire feeders are balanced feeders , the bird
acts as a capacitance on one side and the result is that a small amount of the
incident power is diverted. The worst part is that sometimes the birds
survived, but left their feet on the feeder.
Bear in mind that these shortwave feeders are
connected to senders running from 100kW to 300kW depending on era.
Arcs in the antenna field were not uncommon during my
days on shortwave. We dreaded stubble burning season large
lumps of ash played havoc with open wire systems
Dave, I wonder where you worked? I had spells at
Daventry and Wooferton and some project work at Rampisham and
Skelton
Sent: Monday, December 24, 2012 11:51 AM
Subject: Re: LF: Unusual radio mast video Ukraine
??
Hi Dave
Must have had the bad luck to step on a voltage peak of the standing
wave?
73 es GL, HNY es MX Pete M0FMT IO91UX
I used to work on short-wave broadcast stations using
open wire feeders. When a bird alighted on one feeder a huge arc would be
struck and I could plainly hear the audio from the service. Once the
transmitter had tripped and the smoke cleared, all that remained of the bird
was its feet stuck to the wire...
Merry Christmas!
Dave
G3YXM
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