[OKDXA] Dipole Antenna Question

K5SIT BOB [email protected]
Thu, 31 Oct 2002 15:21:10 -0600


Howdy Jerry,

I have 2 inverted vees at 45'. One for 160m and one for 75m. I had to keep
trimming
to get a good SWR. One is E-W and one is N-S. 1 to1 balins on both. Make 'em
a
little too long and you will have room to trim. Try to keep the coax as far
away from the
tower as you can. Best time to trim is during a rain or snow storm. Also
deer walking
in to them helps to stretch them out.(actual prob. here) hi

Bob k5sit 73 es gud trimming

----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Thursday, October 31, 2002 03:04 PM
Subject: [OKDXA] Dipole Antenna Question


> Builders of wire antennas I have a question that likely could be answered
by a scan thru the pages of the ARRL handbook but I figure I can get a
quicker (possibly even wiser (wiser to mean intelligent vs. wise acre) with
a query here.
>
> I'm putting up 20 mtr and 40 mtr dipoles for alternate antennas and have
constructed them using the familiar 468/freq/2 per leg.  I hoisted each on a
mast (approx. 35') and tied off the ends at a lesser height.  They almost
resemble Vees.  SWR is about 1.5:1 at my design freq. on each and my
question is:
>
> When I install them permanently I will get them to the dipole (horizontal)
position vs. a vee looking position.  If I get them to a flat SWR in my test
position, Vee with a 35' center what should I expect the SWR to do?  My
thinking is some of you have an answer that can let me trim/add while I'm
testing before I hoist them into operating positions.
>
> Knowledgable responses will be gratefully accepted.
>
> 73 - Jerry K5YAA
>
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