[Antennas] Antennas Digest, Vol 118, Issue 9

Tue Mar 18 12:12:50 EDT 2014

Richard said exactly what I was going to suggest. 2 vertical radiators. They might interact slightly, so if you want a 'perfect' swr you might have to do some trimming.
I have a 6 band 'fan' dipole and it works fantastic...
ron
N4UE

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To: antennas <antennas at mailman.qth.net>
Sent: Tue, Mar 18, 2014 12:00 pm
Subject: Antennas Digest, Vol 118, Issue 9
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Today's Topics:
 1. Re: Vertical antenna question (Riichard Neuman)
----------------------------------------------------------------------
Message: 1
Date: 2014年3月17日 20:36:41 -0400 (EDT)
From: Riichard Neuman <secopsys at aol.com>
To: vu3sxn at gmail.com, antennas at mailman.qth.net
Subject: Re: [Antennas] Vertical antenna question
Message-ID: <8D1105943A6C4AB-2B3C-293F8 at webmail-d275.sysops.aol.com>
Content-Type: text/plain; charset="us-ascii"
I would think about building it with elevated vertical and elevated radials (4 
per band) instead
of ground mounted radials....unless you can put down at least 36 ground mounted 
radials
with ground mounted vertical. Or unless you live at salt water.
I would forget the trap and erect two vertical elements ...one for each band 
using either
aluminum tubing or even wire... both fed by same coax at bottom. Separate the 
two vertical
element with PVC pipe pieces every few feet so the weather/wind will not change 
their
spacing from one another. 
Support the whole thing with a non-metalic pole or hang it from a tree etc.
You may have to play a bit with element lengths but they will be somewhat close 
to
quarter wave formula lengths. Wire verticals are easy to play with element 
lengths.
Richard

-----Original Message-----
From: Shubham Tiwari De VU3SXN <vu3sxn at gmail.com>
To: antennas <antennas at mailman.qth.net>
Sent: Mon, Mar 17, 2014 10:55 am
Subject: [Antennas] Vertical antenna question
Hi i am planning to construct a dual band vertical antenna for 14.200 and 21.200 
mhz.. 
Can any one help me that how can i make this type of antenna without affecting 
much of the performance
Thanks
Shubham
Vu3sxn
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End of Antennas Digest, Vol 118, Issue 9
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