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echo: ham_tech
to: BRUCE LEGRANDE
from: WAYNE SAROSI
date: 1996-08-31 21:09:00
subject: FM antenna 88-108

In a message to Wayne Sarosi  Bruce LeGrande wrote:
 > WS> [HAM_TECH LOW BUDGET ANTENNAS - 5]
 > WS> Although this isn't ham_tech related, this antenna will come in
 > WS> handy for anyone who listens to Commercial FM (88-108 MHz) and has
 > WS> a couple of stations that just don't quite make it using the
 > WS> internal antenna or a wire dipole inside the house.
 > WS>        |                 5 feet                    |
 > WS>         ___________________________________________   ___
 > WS>        (____________________  _____________________)  ___ 4-6
 > WS> inches                             1 inch
 BL> Looks basically like what I bought from RS a few years ago (don't
 BL> know if they still stock it or not), but theirs used very small
 BL> solid rods so the band was much sharper.  I like your idea of
 BL> using the copper tube better!  Theirs was also an omni, as it was
 BL> bent into an S shape (as viewed from top).  What is your opinion
 BL> on doing that with this one ?  What would it do to the feedpoint imp ?
I'm not familar with the RS design as I don't look at their antennas
very much save TV antennas. Most of their purchases are not of RS design.
The copper tubing was just a good purchase at the time. You can use 
aluminum tubing with no problem. A dipole is not quite omni as you know.
My design is a dipole. I believe I am familar with that design now that
I think about it. It reminds me of the antennas the elderly use with 
their motorcoaches. Use mine and you'll get much better results.
To make it onmi just place it vertical. FM commercial uses circular
polarization anyhow.
-WS
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* Origin: Editor HTL, Moderator HAM_TECH (Quick 1:374/73.2)

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