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[TowerTalk] V-beam vs open loop

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Subject: [TowerTalk] V-beam vs open loop
From: zeitler@ibm.net (zeitler@ibm.net)
Date: Mon, 6 Sep 1999 21:27:44 -0700
Esteemed Reflectees,
Upon surveying my tiny weeny San Diego surburban lot I have come to this
conclusion:

I have approx. 60 feet in width by around 130 feet in depth. This adds up to
380 feet. Now my idea:

1. Erect a low level horizonal loop measuring 60 feet on two ends and 130
feet in the other two ends. From the sky it would look like a rectangle. Why
do this? Well, feeding it with open wire feed would give  me a nice all band
alternate (low noise?) receive antenna and heck, maybe even a decent 80
meter xmit ant for local rag chews if at least up off the ground a few feet.

If I open the far end in the middle (the 60 foot end) this would be approx
2.7 wavelengths on 20 meters. Not sure what this would do but I seem to
remember Paul Carr N4PC doing something like this in a CQ mag. a few years
ago but can't remember the results.

Top view looking down at horiz. loop:


---------------------------------------------------------------------
!                                   130'
!
!
!
!
!
! 60'
!  60'
!
!
!
!
!________________130'___________________!


The feed point is in the middle of one of the 60 foot legs. Either run it as
a closed loop or run it as an open loop with the opposite side of the feed
piont open with a relay when desired.

So I am curious if this would play on 20 meters.

Any ideas?

I might just put it up anyway and see what happens!! I have several nice
ceramic relays that I can open and short the far 60 foot end with.

An option would be to make it a V-beam but it would barely be a 2
wavelengths long vee beam (on 20 meters)
and probably not have that much gain.

Comments welcomed!!

Lane
Ku7i


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