[Antennas] Trap for 160/80m loop ?

Mon Jun 18 11:37:40 EDT 2007

Sam, If you use a 80 meter 1/2 wave of ladderline at the far side center
from the feed point, and have the free end shorted, for 80 it will be
shorted to maintain the full wave loop. On 160 it will be a 1/4 wave and
will be an open to leave you with a 1/2 wave dipole.
You can coax feed and have a 2 band antenna.With a tuner it will possibly
work on 40,30 and 20 meters also.
Healthfully yours,
 Don W4BWS
----- Original Message ----- 
From: "Sam Morgan" <ka5oai at jass-ltd.org>
To: "antennas - qth.net" <antennas at mailman.qth.net>
Sent: Sunday, June 17, 2007 9:27 PM
Subject: Re: [Antennas] Trap for 160/80m loop ?
> Sam Morgan wrote:
> > I want to use a ~265 foot horizontal 80m closed loop, on 160m
> > what I need/want to do is
> > open the far side of the loop when it is operated on 160m
> > and close it for 80m and above
> >
> > how do I do that?
> >
> forgot to add, the loop is and has to be coax fed
> not a situation where ladder line can be used!!!!!
> -- 
> GB & 73's
> KA5OAI
> Sam Morgan
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