[amsat-bb] suitable omni antenna for FM sats?

Kenneth P Alexander ve3hls at gmail.com
Sat May 11 21:02:09 UTC 2019


...and once they announce their presence, a station from DP79 will attract
a lot of attention!

Ken (VE3HLS)
So Phisai, Thailand
Blog:  bueng-ken.com

On Sun, May 12, 2019, 03:13 John Kludt via AMSAT-BB <amsat-bb at amsat.org>
wrote:

> Ron,
>
> Everything Jeff days is true.  But some of us live in covenant restricted
> settings and an omni is much easier to sneak in under the radar.  I have
> switched back and forth between eggbeaters and various verticals.  So far
> 88 grids.  Three points:
>
> 1) Pay attention to ERP.  You are going to need a little more uplink power
> to make up for the lack of Tx antenna gain.
> 2) Always, always use a preamp at the antenna on 435 down links
> 3) Be patient.  This is a compromise solution and you are not going to
> knock them down every pass.
>
> If it is all you can do go ahead.  Better to be on the air working the
> birds as best you can than doing nothing at all.
>
> John
>
> Sent from my Verizon Motorola Smartphone
> On May 11, 2019 00:34, Jeff Moore via AMSAT-BB <amsat-bb at amsat.org> wrote:
> >
> > As was stated multiple times in a very recent thread - omnis for sat
> work
> > are a poor compromise!!    Even a small beam at a 15-degree angle will
> > generally blow most omnis off the roof! Even better would be a pair of
> > beams (one for uplink, one for downlink) on an azimuth/elevation rotor!
> > But handheld can work almost as good!!
> >
> > 7   3
> > Jeff Moore   ---   KE7ACY
> > CN94
> >
> >
> > On Fri, May 10, 2019 at 10:08 PM Ron VE8RT via AMSAT-BB <
> amsat-bb at amsat.org>
> > wrote:
> >
> > >    We have a newly licenced amateur in DP79.  Because they fell a few
> > > points of getting their Basic with Honours they do not have HF
> > > privileges, their only way to communicate with the outside world is
> via
> > > satellite.  Anticipating this possible outcome, that they may not get
> > > access to the HF bands, I sent them a hard copy, (no home internet,
> and
> > > its slow and expensive there if you do have it), of the current copy
> of
> > > "Getting Started with Amateur Satellites".  As we're heading into the
> > > time of year to do any outside work, the most pressing question is
> what
> > > is the best compromise antenna for a base station.   Keeping in mind
> > > their location, in order to work anyone they'll have to get into the
> > > satellites while the satellite is close to their horizon, otherwise
> the
> > > satellite footprint will not cover areas with any satellite operators.
> > >
> > >    Ron VE8RT in DP22
> > >
> > > --
> > > Ron VE8RT <ve8rt at yknwt.ca>
> > > _______________________________________________
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> > > are solely those of the author, and do not reflect the official views
> of
> > > AMSAT-NA.
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> > >
> > _______________________________________________
> > Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> > to all interested persons worldwide without requiring membership.
> Opinions expressed
> > are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> > Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
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> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
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