[TowerTalk] Broadbanding 80 meter dipole

[Roger (K8RI) on TT]

I'd need 5 auto tuners and the configuration would require that the be 
close to in sync.
These are center fed, half wave dipoles.  I've had excellent results on 
40 and 75.  Unfortunately with the common mode choke and BuryFlex 
hanging from the center. It requires a LOT of tension to keep the 
antennas straight...About 200# worth.  There's a lot of 5/16ths double 
braid rope already on the tower through pulleys, making working on the 
antennas easy, but I don't think the 5 auto tuners would be practical.

73, Roger (K8RI) .

On 8/17/2017 Thursday 3:20 PM, Rod Greene wrote:
> Or use an auto tuner at the feedpoint to match the slopers on whatever 
> band/freq you want to use. That's what I do.
>
> 73, Rod/w7zrc
>
>
> ------------------------------------------------------------------------
> *From:* Roger (K8RI) on TT <K8RI-on-TowerTalk at tm.net>
> *To:* "towertalk at contesting.com" <towertalk at contesting.com>
> *Sent:* Thursday, August 17, 2017 12:33 PM
> *Subject:* [TowerTalk] Broadbanding 80 meter dipole
>
> I've seen a few possibilities in the past, but I'd like to add a dew
> slopers to come up with the 5 used for some directivity, gain and front
> to back. Switched coils at the feedpoint with frequency sensing would
> likely work.  I've had excellent results with just a couple switched
> slopers on 40.
>
> To complicate things I'd like to do this and maintain the dual band 75 /
> 40 meter operation, which would likely require separate feedlines. The
> unused line would / could end up as a stub.  I could possibly use the
> frequency sensing to disconnect the coax for the unused band.
>
> Thoughts?
>
> -- 
>
> 73
>
> Roger (K8RI)
>
>
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-- 

73

Roger (K8RI)