Thread: Log-Periodic Antenna Design
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Old November 21st 08, 08:14 PM posted to rec.radio.amateur.antenna,sci.electronics.design
GregS[_2_] GregS[_2_] is offline
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First recorded activity by RadioBanter: Nov 2007
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Default Log-Periodic Antenna Design
In article , (Dave Platt) wrote:
Twin lead could make a comeback since there won't be such a worry about the
low band interference issue. Actually much less loss than coax.

Maybe... when it's new, of the right type (e.g. tubular), clean, dry,
and carefully installed.

My understanding is that the performance of 300-ohm twinlead
installations tends to deteriorate significantly after a few years
(sunlight and ozone attacks the twinlead, and dirt and pollution
builds up) and during wet weather.


Last time I used twinlead, except for fiddling around, was on the family
TV antenna installation using an Allied Radio Corodized VHF antenna,
with Beldon Super Permaohm 300 ohm shielded twinlead. Good stuff.

greg
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