Here's an interesting write up:
http://forum.qrz.ru/attachments/antenny-kv/117591d1398178187-model-trehbendovoy-hb9cv-my-hb9cv-trybander-story.docRudy
N2WQ
From: Hans Hammarquist <hanslg@aol.com>
To: r_bakalov@yahoo.com
Sent: Tuesday, June 2, 2015 11:49 AM
Subject: Re: [TowerTalk] Multiple HB9CV on a shared boom
Hi Rudy,
I have no experience with your suggested multiband HB9CV but I built several
single band versions. I am very interested how this will work out for you as
the HB9CV, to me, appears to be the best gain/material factor antenna. i never
even thought of a multiband version.
My first thought,reading your mail, is that you should not use regular coax
cables for the phasing line as the dielectric will change the phase angle,
something that might be detrimental to the gain and F/B ratio. It might not
even be necessary to shield the different phase line from each other.
Please keep me posted.
Best 73 de
Hans - N2JFS
-----Original Message-----
From: Rudy Bakalov via TowerTalk <towertalk@contesting.com>
To: Tower Talk <towertalk@contesting.com>
Sent: Tue, Jun 2, 2015 9:06 am
Subject: [TowerTalk] Multiple HB9CV on a shared boom
I was wondering if anyone has experience with building a 3 band HB9CV on a
shared boom. Basically, 3 separate antennas nested into each other- 20m, 15m,
and 10m. My thought is to use coax for the phasing lines and a non-conductive
boom so that there is no feed/phase line interference.
The antenna will be
fixed and suspended by ropes so the non-conductive boom is not a structural
issue.
Thoughts?
Rudy N2WQ
Sent using a tiny keyboard. Please excuse
brevity, typos, or inappropriate
autocorrect.
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