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@tm.net>
To: "towertalk@contesting.com" <towertalk@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)
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|