[VHFcontesting] crankup tower, multi band antennas, and coax

[Leandra MacLennan]

Oops, I didn't realize how tired I was last night when I sent my e-mail.

Here is what I meant to say . . .

I recommend wiring your tower antennas so you can simultaneously use two or more antennas.

If you would like to get on the satellites you need to listen for yourself in the satellite downlink (frequency) transponder passband while transmitting on an uplink frequency to confirm you are getting into the satellite. (Most Low Earth Orbit (LEO) satellite passes are less than 45 degrees, and the low angle passes give the best opportunities for working long distances)

For the ARRL VHF contests, you could maintain communications on 2M with the other contest station while you are both attempting to make contact on 220, 432 and 1296.

   -Leandra, AF1R


-----Original Message-----
From: VHFcontesting <vhfcontesting-bounces at contesting.com> On Behalf Of Leandra MacLennan
Sent: Sunday, December 8, 2019 11:43 PM
To: vhfcontesting at contesting.com
Subject: Re: [VHFcontesting] crankup tower, multi band antennas, and coax

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 at contesting.com> On Behalf Of K7XC Tim Marek
Sent: Sunday, December 8, 2019 11:20 PM
To: VE7HR <ve7hr at ve7hr.ca>
Cc: vhfcontesting at 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 at 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 at 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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