[Antennas] Open Wire

2002年12月12日 15:47:56 -0600

Thanks to all who corrected me---yes folded dipole not doublet---senior moment
At 03:16 PM 12/12/2002 -0500, Don Havlicek wrote:
>Bob,
>You say a 'doublet' is a 'closed circuit' .. that's incorrect... you must 
>mean a 'FOLDED DIPOLE' which IS a CLOSED CIRCUIT.
>Don
>N8DE
>>You wrote:
>This thread on 450 ohm open line has been interesting. I use 450 ohm 
>ladder line
>here and it works great for me. This thread reminds me of my original 
>mentor when
>I got into ham radio some 55 years ago, who used 600 open wire feeders to 
>a random
>doublet. The late Wilson Rowell, ex W2HHL used a 135 foot doublet fed 
>with 600 Ohm
>open line at about 50 feet off the ground. The beauty of this antenna was 
>that in
>severe icing conditions Wilson would connect a 10V, 20amp filament 
>transformer across
>the 600 Ohm open line and melt ice off of his antenna. Remember that a 
>doublet is
>a closed circuit, so the antenna appears as a short to the transformer.
>>Some in North Carolina should have been using this in the past few weeks.
>I used a similar antenna at Eglin AFB back in 1966 when they first came 
>out with the
>first open wire feed line (before ladder line as we know it) and it worked 
>great,
>but of course there was no ice to worry about.
>>Bob Wilder, AF2HD/AFA2HD
>>>>>>---
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Bob Wilder, AF2HD/AFA2HD
6032 Idlemoore Court
Theodore, AL 36582-4117
251-653-5274
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