If you would ever like to work satellites, you need full duplex so you need to
hear yourself, so you must simultaneously listen on one band while transmitting
on another band.
And, for the ARRL VHF contests, if would be nice to be able to keep a 2M link
open with another contest station while you are both QSYing to 222, 432 and
1296.
-Leandra AF1R
-----Original Message-----
From: VHFcontesting <vhfcontesting-bounces@contesting.com> On Behalf Of K7XC
Tim Marek
Sent: Sunday, December 8, 2019 11:20 PM
To: VE7HR <ve7hr@ve7hr.ca>
Cc: vhfcontesting@contesting.com
Subject: Re: [VHFcontesting] crankup tower, multi band antennas, and coax
I would use four separate feedlines as each has varying needs of acceptable
feedline loss.
73s de Tim - K7XC - DM09jh... sk
Adapt, Overcome, Succeed!
On Mon, Dec 9, 2019 at 3:58 AM VE7HR <ve7hr@ve7hr.ca> wrote:
> I am doing something on a slightly smaller scale.
> Hoping to do 2M,222,70cm and 1296 on one feed line with a quadplexer
> on both ends.
> After a long wait the quadplexers arrived I swept them and returned
> them to manufacturer. I have hope they will be returned meeting
> specification.
>
> Curious to see what they experts have to say.
>
>
> Thanks
> Dave
> VE7HR
>
> Sent from my iPhone
>
> > On Dec 8, 2019, at 7:49 PM, Kim <whensley11@comcast.net> wrote:
> >
> > Hello all!
> >
> > I'm looking for feedback, suggestions, and experiences.
> >
> > I have a 72-ft crank up tower that I want to populate with
> > multi-band
> VHF/UHF antennas through 1296.
> >
> > My initial thought was to use one feedline (heliax) with relays to
> select the source and the corresponding antenna.
> >
> > In raising and lowering the antenna my intention was to walk the
> feedline out to avoid kinks and sharp bends.
> >
> > Another approach would be multiple feedlines.
> >
> > There would be only one antenna per band for terrestrial work.
> >
> > Thank you for your time and thoughts.
> >
> > 73, Kim - WG8S
> >
> > _______________________________________________
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> > VHFcontesting@contesting.com
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