You guys are way ahead of me. I'll settle for reality!
I live in a high-rise Manhattan building and must do my satellite operation
by carrying all the needed equipment out to the promenade behind the
building next to the East River (2 miles due north of the UN building).
I'm looking for a way to lighten the load, and the netbook looks promising.
N3TL even reports that the Yaesu CAT to USB cables he bought worked without
installing new drivers. That's big because I don't know how to "map"
another computer's CD drive into a netbook to read any new drivers!
Tnx for the ideas.
> [Original Message]
> From: Nigel Gunn G8IFF/W8IFF <nigel(a)ngunn.net>
> To: Bruce Robertson <ve9qrp(a)gmail.com>
> Cc: myles landstein <myles.landstein(a)gmail.com>; AMSAT BB
> Date: 12/4/2009 12:19:22 PM
> Subject: Re: [amsat-bb] Re: Netbooks
> Why virtualise?
> Use a dual core processor and run a different operating system on each
> Bruce Robertson wrote:
> the virtualization features turned on so that I can
> > run linux images alongside the Win32 ham stuff.
Today only, Amazon has the La Crosse BC-9009 AlphaPower Battery Charger for $34.99 shipped. And in addition to NiCD/NiMH charger, you get four AA rechargeables, four AAA's, adapters for C and D cells, and a travel case.
Charger features four independent status displays, one for each of its four slots. They can cycle through stats like charge rate, discharge rate, elapsed time, and total battery capacity.
Clint Bradford, K6LCS
Has anyone used SatPC32 with a netbook computer? I'd appreciate your comments. Which netbooks do best? What ports do netbooks come with?
I just tried SatPC32 on AO-7 with an old Dell Inspiron 3800. It works well controlling 2 FT-817s in the shack. When outside, using a charged battery, it was very slow. I had to restart SatPC32 a couple of times, and, as a result, lost at least 2 QSOs with Europe. Maybe it's time for a change.
Tnx and 73,
Just a quick "THANKS" to all of those operators they made the effort
to work (us) me during my demo with the Delta ARC ham class last
night on S0-50. A little "cold" outside at that time. I think winter is here.
73 to all,
I will be doing a satellite demo on S0-50 tomorrow night from Memphis
for our current Tech. class. It will be on the Dec. 4th - 0250utc pass.
I would appreciate a few contacts to show them how easy it is to work
the "birds" with an HT and handheld antenna.
Thanks in advance,
Rick - WA4NVM
At 06:38 AM 12/4/2009, Jan-Albert Koekemoer wrote:
>The (partial) schedule for SO-67 for the next couple of days are as follows:
Jan, did you get my email for VK/ZL?
73 de VK3JED / VK3IRL
> On the 2242UTC pass of AO-51 tonight, we will try for the first time to
> reverse the magnet and "flip" the orientation of the satellite. While we
> do this, the 435.300 transmitter will be shut off for about 10 minutes.
> If the reversal is successful, we should see some changes in signal
> levels and patterns. This particular maneuver has not attempted since
> I'd appreciate any signal reports or observations from this evening and
> the next few days be emailed to ao51-modes(a)amsat.org or ko4ma(a)amsat.org.
I'm really glad we are finally testing this AO-51 experiment! Thanks for
listening to my request. I'm most interested in seeing the results of this test,
but I don't see the ao51-modes reports, so please keep me posted offline.
Since angular momentum must be conserved when you "flip" the s/c. The s/c body
should precess (probably looking like tumbling) until the momentum dampers
absorb the change. Keep an eye on the solar panel currents and I'll bet the spin
rate will change.
Concerning your other note:
> In related news, as the spacecraft spin inexplicably continues to slow,
> we are seeing increasingly larger dips in the spacecraft voltage when
> the panels are poorly aligned to the sun.
My guess is that the momentum loss is due to eddy currents induced in the s/c
body by the earth's magnetic field. Sometime drop a piece of (non-magnetic)
aluminum into the poles of a big magnet -- you'll see the aluminum change speed
noticeably. Back in the antique days of mechanical speedometers in cars, the
speedo cable turned a permanent magnet above an aluminum or brass disk connected
to the indicator. As the magnet spun faster, eddy currents would drag the
disk/pointer to higher values.
There are some good treatments of eddy currents& angular moment on YouTube at
In these clips, note that moving brass or aluminum items (acting just like the
satellite body) "feel" the static magnetic (like the earth's magnetic field).
For some (boring) physics theory, follow the links at
73 de Tom, K3IO