[TowerTalk] Force12 EF-320

Larry lknain at nc.rr.com
Mon Aug 8 08:13:00 EDT 2016


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 at 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 at contesting.com
> Subject:	[TowerTalk] Force12 EF-320
> From:	wp3c via TowerTalk <towertalk at contesting.com>
> Reply-to:	wp3c <wp3c at 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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