Joseph I have it in a zip file but it is 4MB. If you let me have your
offline address I will try it.

The cellphone prohibition is an FCC matter. The reason is that cell
phones normally have short range and will communicate with one or
several nearby cell towers. From an airplane, your cell phone can
easily be in contact with dozens or more towers. So your one cell
phone trtansmission impacts channel usage over a large geographic
area. To keep channel usage reasonable, these high altitude
transmissions are prohibited. You will probably find at our lower
altitudes you cell phone will work just fine, though still in
violation of FCC rules. (When your phone is detected on too many
towers you may get an "out of service" indication). To stay legal,
restrict usage to on-the-ground. In an emergency, of course, do what
you have to do.

--- In Q-LIST@... <Q-LIST%40yahoogroups.com>, "FR Jones"
<seabeevet@...> wrote:

Shooting from the hip on this, two issues come to mind. First, why

would

using a cell phone in a private plane make a difference? Cars,

comercial (on

the ground taxi), boats etc. are all okay. Next, who would know if

someone

did use their cell from their private ac?
All answers come from how you ask the question. The definitely "no"

answer

may have been intended for a passenger on an airliner in flight...

that "no"

comes from the disruption of navaids etc.
Just some thought to think about.
Dick

Quoting FR Jones <<mailto:seabeevet%40gmail.com>seabeevet@...>:

Shooting from the hip on this, two issues come to mind. First, why would
using a cell phone in a private plane make a difference?

As has already been pointed out here:

The core prohibition is from the FCC, because it would cause your phone
to claim
an active channel on dozens of towers at once, rather than one or two
as is the
design.

The Mythbusters show on the discovery channel tried this Myth out (on the
ground; they weren't allowed to in the air). They built a device that
broadcast broad-band signal on cell frequencies. They couldn't get a
certified
aircraft to react at all.

However, they also built a mock-up of a cockpit with just some surplus
instruments. The digital cell phone signal (1.8 GHz or so) didn't produce any
results. However, analog cell signals (900 MHz range) made the VOR go
haywire.

SO...I think that depending on shielding, in a homebuilt particularly,
an active
analog cell phone on board could very easily cause the VORs to lose
their lock. This would be particularly true in a fiberglass airplane,
which doesn't have the
natural conductive shielding of a metal airplane.

I've always assumed that the cell phone jack on aviation headsets was to call
flight service to activate or close your flight plan while taxiing, or to call
other people while you're on the ground and the engine is running.

Craig Steffen