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[TowerTalk] insulated wire wrapped-back

To: <>
Subject: [TowerTalk] insulated wire wrapped-back
From: (Hawkins, Bill)
Date: Sat, 22 Mar 1997 15:44:25 -0600
But Chuck, 
I'll bet your ends have been stripped of insulation like mine
so it appears to be one wire, not a loop.

Bill W5EC

t 05:31 PM 3/22/97 +0000, you wrote:
>At 08:22 AM 3/22/97 -0800, K6LL wrote:
>>David O Hachadorian wrote:
>>> I was at another contester's station not too long ago, and
>>> noticed that he had constructed his inverted vees with
>>> insulated wire, and had looped several feet of excess wire
>>> on the ends back on itself without removing the insulation.
>>> I wondered about weird end-loading effects, and possibly
>>> arcing under high power. Any thoughts or experience one way
>>> or the other?
>>> Dave Hachadorian, K6LL
>Hello Dave...
>I use this technique on both my 80 and 160 meter inverted
>vee antennas.  I have about 4 feet looped back on each end.
>This allows me to easily drop the ends and adjust them to
>resonate anywhere I desire without cutting/splicing/soldering
>wires.  I run the legal limit on these bands.  Works for me.
>   73 de Bob - K0RC
>Then KL7HF wrote:
>> Has several effects - capacitive hat causing a loading effect - and
>>since it is at the voltage peak point of a dipole, hi voltage is
>>there, but the voltage developed across 6 inches or so will not be
>>high enough to cause arcing.
>>However - damned poor practice!
>>de KL7HF
>Hello KL7HF...
>   Where do you get this 6" spacing?  My antenna ends wrap back
>upon themselves, the spacing between conductors being only twice
>the thickness of the insulation.  Any end loading effect is 
>compensated by the ease of unwrapping the wire, adjusting the
>position of the end insulator, and rewrapping the tail wire.
>Anyway, wouldn't end loading pull the current lobe out away from
>the center support tower?  I think this is a very good practice!
>   73 de Bob - K0RC
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