[Antennas] Question about Feedline length and how it might..

2002年4月08日 13:16:49 -0700

Also, in the Sahara Desert .. in the 60s ... and, like from the United
Emirates ..20M, as I recall -- waaarrrrr laying (lying?) on the sand (very
high silica content)
Mark .. AA6DX ( PS -- tried this myself w/ actual RF ground down 6' +/- --
worked pretty swell on 75M, close in .. like a very lossy dummy load!
 =|;?} )
----- Original Message -----
From: "Bob Wilder" <[email protected]>
To: <[email protected]>
Sent: Monday, April 08, 2002 6:23 AM
Subject: Re: [Antennas] Question about Feedline length and how it might..
> What Harvey says is basically true, though antennas fed with coax
> have operated while laying on the ground. Case in point, the antennas
> on the former weather site "T-3" had their antennas almost 8-10 feet
> below the surface of the ice and always had a good HF signal.
> Historical info: Fletcher Ice Island (T-3) used to float around the ice
pack
> at the north pole and was used by the Russians for part the years,
> then the Alaskan command for part of the year and finally the old
> Northeast Command with crews out of Thule the remainder of the year.
>>>> At 09:00 AM 04/08/2002 -0400, Harvey&Bessie wrote:
> >It would seem to me that the wire laid flat on the ground would be a
> >good dummy load. In your former arrangement the feed lines were acting
> >as the antenna. When you changed the feed line arrangement you, in
> >effect, changed the actual antenna. Therefore the results changed
> >drastically.
> >Harvey/W4TG
> >http://mailman.qth.net/mailman/listinfo/antennas
> >
>> 73
> Bob Wilder, AF2HD / AFA2HD(USAF MARS)