For coax length one quick way to check is to insert say a 6 foot jumper
in the line and if the SWR changes then coax length is probably the
issue. If the SWR is unchanged with the jumper the issue is probably
something else.
73, Larry W6NWS
On 8/8/2016 7:53 AM, john@kk9a.com wrote:
I have no experience with Force12 beams. However, since your post was
unanswered and lost in the measuring coax loss within .001dB thread I will
try to help. I believe that Force12 monobanders are OWA design, meaning
that the coax is directly connected to the driven element with no matching
to go wrong. How high is the SWR and how are you measuring this? If you
have coax in multiples of 1/2 WL lengths you can also check the impedance
with an antenna analyzer. Did you double check your measurements? Are you
using the Force12 balun and good coax? Is there anything near the antenna
that could be detuning it?
John KK9A
To: towertalk@contesting.com
Subject: [TowerTalk] Force12 EF-320
From: wp3c via TowerTalk <towertalk@contesting.com>
Reply-to: wp3c <wp3c@aol.com>
Date: Sun, 07 Aug 2016 10:00:43 -0400
Hi
I put a Force 12 EF-315 and a EF-320.
The one for 15M (EF-315) is 1:1 but the one for 20M (EF-320) I'm having SWR
high.
Did someone here that have some knowledge about this antenna and could bring
some help with this?
Thanks
Alfredo WP3C
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