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Re: AO-40 FD Newbies

Good point. So, say there is a QSO or a CQ in progress, and I want to match
my TX to that freq. I won't have the benefit of computer control this year,
but I would assume under most circumstances (i.e. the time frame of a couple
of QSO's) the doppler stays pretty consistent, if I know the
(doppler+transverter) offset (based on your method), I just punch that into
the calculator, dial up the frequency, and should be pretty close to hitting
the mark, rather than swishing my sig up and down the transponder passband?

This is going to be armstrong pointing and working off of paper keps...  ah,
reminds me of the good old days before AO-27 got really popular...


----- Original Message -----
From: "Scott Townley" <nx7u@arrl.net>
To: "Bill Acito" <w1pa@hotmail.com>
Cc: <amsat-bb@AMSAT.Org>
Sent: Wednesday, June 19, 2002 3:38 PM
Subject: Re: [amsat-bb] AO-40 FD Newbies

> At risk of self-immolation...my $0.02 to add to your three points
> 1. Please avoid "swishing" your TX in an effort to "find yourself"
> (sounds Zen-like).
> On other birds it is an annoyance but on AO-40 it can be downright
> maddening.  The additional power density you add when you pass over my
> QSO often sets off LEILA, so I have to wait until it stops yelling to
> continue.  (Yes this happens to me a LOT).  Set your TX freq well away
> from the MB, vary RX to find your own D/L, and based on that pair you
> should be able to do the final Doppler correction to get where you wanna
> go.
> Bring a calculator (I can't do that kind of math in my head well, at
> least not at 1am!)
> But serially, hope to work many stations this weekend, new and old!
> Bill Acito wrote:
> >
> > It looks like my AO-40 station will come together for FD weekend, but I
> > won't be able to get any practice in before then. Looks like the busiest
> > weekend on the bird might be my virgin run.
> >
> > I have a feeling there may be others like myself prep'ing for this
> > who won't have a lot of experience on AO-40.
> >
> > Assuming we have addressed our equipment issues, what are the top ten
> > operating errors we should avoid or watch out for this weekend
> > the load on the bird, from those of you who are frequent users?
> >
> > e.g.
> >
> > 1. Stay away from the middle beacon
> > 2. Be aware of Leila
> > 3. Fix transmitter, move receiver for Doppler
> > others?
> > .
> > .
> >
> > Look for W1PA, 2A WMA, FN42 (Oxford, MA)... looks like the window will
> > about midnight local Saturday until 6am Sunday here on the east coast.
> > FT847, Primestar Dish, helix feed to DEM pre-amp and down converter, two
> > elliptically phased 11-element beams for the uplink.
> > Please be kind.  :-)
> >
> > ----
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