Towertalk
[Top] [All Lists]

Re: [TowerTalk] new Steppir antenna

To: "Al Williams" <alwilliams@olywa.net>
Subject: Re: [TowerTalk] new Steppir antenna
From: "Rick Karlquist" <richard@karlquist.com>
Reply-to: richard@karlquist.com
Date: Tue, 5 Oct 2004 12:44:00 -0700 (PDT)
List-post: <mailto:towertalk@contesting.com>
Al Williams said:
> A relay switchable linear  loaded wire to add use on 80/75 meters.  I
> haven't done the calculations but expect that the  range of the
> extendable elements would cover the entire band in conjunction with the
> linear loaded wire?
>
> What do you all think?
>
> k7puc

You would have to have a bunch of relays in the linear
loaded wire to make it disappear all the way to 54 MHz.
Having thought about schemes like this for a long time,
I would say it is not practical.

If you try to put loading coils at the feedpoint, the
dozens of pF of capacitance between elements (due to the copper
tape feed reel) is a showstopper, not to mention the
high voltage that would be present.

Rick N6RK

_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
and ask for Sherman, W2FLA.

_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk

<Prev in Thread] Current Thread [Next in Thread>