[amsat-bb] AO-7 status?

Fri Jan 5 13:05:05 UTC 2018

Hi Nick,

With AO-7 I would recommend practicing ahead.

Also on AO-7 low power is essential. As Paul mentioned, if the total power
consumption gets too high it flips into mode A.. Also know as: flipping the
bird. Some times there is an early warning when signals starts FM'ing,
other times no warning.

I would recommend running no more than 5W into an Arrow antenna.

Vy 73 de AK4WQ/OZ2DAK, Soren Straarup

On Jan 3, 2018 21:27, "Nick Hart" <nickhart at usa.net> wrote:

> Great input, Paul!
>
> Thank you, and 73!
>
> Nick
> KK6ZLF
>
> ------ Original Message ------
> Received: Wed, 03 Jan 2018 07:09:51 PM PST
> From: Paul Stoetzer <n8hm at arrl.net>
> To: Nick Hart <nickhart at usa.net>Cc: Greg D <ko6th.greg at gmail.com>,
> amsat-bb at amsat.org
> Subject: Re: [amsat-bb] AO-7 status?
>
> AO-7 has generally been stable for the past several months. In the Northern
> Hemisphere spring and summer months, it has been quite unstable, easily
> switching out of Mode B when signals are present in the passband. This is
> likely due to the sun's angle on the solar panels. AO-7 has no panels on
> the "top" or "bottom" of the satellite, and with AO-7's current orbit, the
> sun is not in an ideal position to illuminate the satellite's solar panels
> during the Northern Hemisphere summer.
>
> For a demo next week, AO-7 has an excellent shot of being active in Mode B.
> Next month, or in March, the chances may be less.
>
> 73,
>
> Paul, N8HM
>
> On Wed, Jan 3, 2018 at 9:22 PM, Nick Hart <nickhart at usa.net> wrote:
>
> > Absolutely agreed, Greg,
> >
> > We're just limited to what's passing over during the club meeting for the
> > kids
> > this month.  We'll have one or two more club meetings between now and
> ARISS
> > day.  But, we adults who are working the event will have it dialed in by
> > the
> > time of the ARISS QSO.
> >
> > Thanks!
> >
> > Nick
> >
> > To: Nick Hart <nickhart at usa.net>Cc: amsat-bb at amsat.org
> > Subject: Re: [amsat-bb] AO-7 status?
> >
> > Nick,
> >
> > If you want some practice ahead of the ARISS event (really good idea!),
> > it might be a more relevant experience to get a few of the FM birds
> > under your belt.  AO-85, AO-91, SO-50.  Perhaps track the ISS via Packet
> > (when/if they get the packet station back on the air), to get a feel for
> > that system.  Also watch for any ARISS events that you can listen in on
> > (for example, the telebridge contacts through W6SRJ in Santa Rosa).
> >
> > Some of the ground station operations, either direct or telebridge, have
> > been documented on YouTube.  Also worth a watch.
> >
> > As for AO-7, first look at the status logs on Amsat.org
> > (http://www.amsat.org/status/); seems like it's pretty much been in Mode
> > B (70cm up, 2m down), but that can change as the satellite's eclipse
> > schedule changes over the course of the year.  Otherwise, it is
> > definitely a daylight-only bird (as seen by the satellite, not
> > necessarily here on the ground).
> >
> > Best of luck for your contact,
> >
> > Greg  KO6TH
> >
> >
> > Nick Hart wrote:
> > > Good afternoon,
> > >
> > > KK6ZLF in CM87.  I am elmering a radio club at the local middle school,
> > and
> > we
> > > have a scheduled ARISS QSO coming up in March.
> > >
> > > A week from tomorrow, we're going to try to do a few QSOs on the
> > available
> > > birds during the club meeting, 22 to 23:00 zulu.  One of the passes is
> > AO-7.
> > I
> > > saw on the AMSAT site that it is working strictly on solar power.  But,
> > this
> > > should be a good daytime pass for us.
> > >
> > > Does anyone have any recent experience and advice for AO-7?
> > >
> > > Thanks, and 73!
> > >
> > > Nick
> > >
> > > KK6ZLF
> > >
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> >
> > _______________________________________________
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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
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> AMSAT-NA.
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