This may be a dumb question (it sounds like all of the replies to this
thread have been far more tech-savvy than I) but is the antenna that the xm
radio system uses specific? Why couldn't you wire their receiver into an
existing gps antenna (fixed or portable)?
Are different satellite receivers able to share an antenna? If I understand
their ad, the premium service uses the same antenna but adds a gps module to
give specific mapping data. It sounds like this is a sharing arrangement
since the gps satellites and "rock" and "roll" are obviously distinct. What
if you already have a gps (portable or panel mounted) Is the premium service
able to use the signal from that? Frank
"Jeff Doran" wrote in message
m...
Richard, thank you for posting the info on the xmradio weatherworx. I,
like many, have been searching for reliable in-cockpit weather
solutions. The closest thing to affordibility so far has been anywhere
wx from control vision, but even that is a bit pricey, and a rats nest
of wires. I use the Palm i705, and you just can't beat it for
portability and cost. However, as reliable as it is, even in flight,
there are too many times, when I just didnt get a signal or reply when
making an inflight weather request from CBAV or TurboWX.
For that past month, I have been using a poormans version of the
control vision solution...
Globalstar SAT phone, $595 list/$495 with rebate/$395 reconditioned
Ipaq H3635 pocket pc, on ebay for $100 (or any pocket pc), you can
even hook to your i705 and switch back and forth between the wireless
palm network and the SAT connection. I prefer the higher resolution
and color on the Ipaq for maps.
Globalstar data cable, $69;
IPAQ Serial Cable (not a hotsync cable, they are not the same) $20;
SAT phone is $35/month and .99/minute with 30 included min/month, or
$50/month with 120 minutes/month, .75/minute after that.
Control Visions deal is $25/month, first 100 mins free, then .99/min
after that.
A wide range of service plans to fit both budget and use.

(I do not work for any SAT phone company or aviation product company)

Data comes down at 9.6Kbps,plus I can make reliable, consistant voice
calls in flight.
I have not had any problem aquiring and holding a SAT signal in
flight, as long as the antenna is held reasonbly close to a window.
The glare shield is fine.
Admittedly, this is a request/reply setup, and I typically use
weathertap.com and flighbrief.com for inflight weather. Not that it is
very useful or fast, I can browse the web in flight, including pop3
email, etc etc...

The result is, I am juggling only a PDA, a short cable, and the sat
phone. Not Bad.

Did you ever notice how big and cumbersome even the smallest laptops
are when in the cockpit? Screen visibility in sunlight is another
concern.

About the only thing I see that XMradio has to offer is its
"broadcast" technology, and (I assume) greater bandwidth...not that
these are bad things.

BTW, I have a Delco Xmradio mounted on the pedestal of my mooney, with
the low profile antenna hiding on the glare shield...works great...but
I can't listen to Limbaugh.


Jeff Doran
Mooney N1159P ACY

As far as WeatherWorx vs. Palm VIIx, I think the people who will pay
$49/month for WeatherWorx and deal with the wiring clutter are people
who
use their airplanes fairly often for practical IFR travel. I think
other
people will stick with the simplicity, compactness, and economic
advantages
of the Palm VIIx. They each have their advantage. To hook up
Weatherworx,
you need to set up the computer, satellite receiver, and XMRadio box,
certainly not something you could/would do on the fly in the air. The
advantage of WeatherWorx is that once this is all set up, it updates
automatically during the flight so it is a lot less distracting. The
advantage of the Palm VIIx is that it can just sit in the side pocket of
your airplane and you can turn it on basically on a whim if you see
unexpected weather. On top of that, the Palm VIIx runs on just 2 AAA
batteries, vs. WeatherWorx which requires either a freshly charged
laptop/PDA battery or else a connection to the airplane's cigarette
lighter
power source.