http://www.ushpa.aero/forms/pkt_Radio_Auth_Student.pdf
The Icom IC-F11 is an example of a type-certificated business band
radio which can also be set for ham radio frequencies. It is not
field-programmable, but can be programmed with a cable and a PC
program at home. I have mine set to the various business band
frequencies that we use, as well as selected ham radio channels.
In the business band, the assumption is that there will be users
with minimal training. Since this band is shared among many
users, some of which are life-safety-critical, it is important
that all radios operating there do not interfere on adjacent
channels. Since the typical biz-band user isn't very well
educated on radio minutiae, a technician is needed to set up the
radio and configure it for operation on the authorized frequencies.
This way the user just needs to know, "Push this, talk in here".
So long as radio operations are conducted in a low-key, non-interfering
way, it's unlikely that anyone's going to come looking to see what
sort of radio you're using. Only if you cause interference problems
is that a likely outcome. Keep your power level set to the minimum
needed for communication, which is usually the lowest setting on
your radio if you're in the air. You can always turn it up temporarily
if you're on the ground and need the extra reach. This limits the
"footprint" of your transmission, which can be over a hundred miles
when you're high in the air. I've personally reached other pilots
over a 30+ mile range using only 3/8 watt, with perfect clarity.
If you hear Fred's Garden Center or a survey crew or some farmers or
any of the other transient band users that *ALSO* are authorized on
those same five frequencies, then change to another frequency. Don't
complain that they're hogging "your" space, because it's shared
space available for many users. They perceive it as "their* frequency,
most likely, and interfering with them is a good way to generate a
complaint call to the FCC and a resulting visit from the antenna van.
If you don't know how to set the power level, set frequencies or
options, or don't know what those choices should be, then ASK! I'm
happy to work with anyone who has radio questions to make sure
that you're operating in a way that minimizes your impact on other
users.
MGF
Sf
-----Original Message-----
From: cp...@googlegroups.com [mailto:cp...@googlegroups.com] On Behalf Of
jjhalle
Sent: Monday, November 02, 2009 22:22
To: Cascade Paragliding Club
Subject: CPC: Re: why the USHPA freq's are not legal (the way we use
them)
No.
"§97.11 Stations aboard ships or aircraft.
(a) The installation and operation of an amateur station on a ship or aircraft must be
approved by the master of the ship or pilot in command of the aircraft.
(b) The station must be separate from and independent of all other radio apparatus
installed on the ship or aircraft, except a common antenna may be shared with a voluntary
ship radio installation. The station's transmissions must not cause interference to any
other apparatus installed on the ship or aircraft.
(c) The station must not constitute a hazard to the safety of life or property. For a
station aboard an aircraft, the apparatus shall not be operated while the aircraft is
operating under Instrument Flight Rules, as defined by the FAA, unless the station has
been found to comply with all applicable FAA Rules."
We don't fly IFR, so as long as your radio isn't interfering with your
flight instruments or causing a hazard, you're legal to operate as a
licensed ham.
MGF
KC7LZD
The nearest FCC monitoring stations are at Ferndale WA, near
the Canadian border, and in Livermore CA.
48 57'20.4'' N 122 33'17.6'' W (Ferndale)
http://maps.google.com/maps?ll=48.955667,-122.554889
37 43'29.7'' N 121 45'15.8'' W (Livermore)
http://maps.google.com/maps?ll=37.725278,-121.754372
It's unlikely that they'll hear you from either one of these
places, but complaints get investigated by the roving antenna
van, which can (and does) show up almost anywhere. Not so
much these days as in the past, but if you cause enough of
an annoyance, they'll send somebody out to find and smite you.
MGF
Two things here. First, I don't think there's a rule prohibiting the
use of a business band radio in an aircraft, on the frequencies that
we are authorized for as transient users. Some frequencies are not
authorized for use on an aircraft, but ours aren't on that list.
http://edocket.access.gpo.gov/cfr_2008/octqtr/pdf/47cfr90.35.pdf
Second, you're confusing frequencies and emission types. A ham radio
transmits using FM modulation, as does a business band radio operating
in the 150-range. An aircraft radio operates using AM modulation,
which is distinctly different. The carrier frequency is not all that
much different, but the modulation is completely different. The
air band occupies the space between the top of FM broadcast at
108MHz and the bottom of 2 meter ham at 144MHz. Most aircraft
voice communication takes place between 118MHz and about 130MHz. In
the Portland area, most airplanes are on 122.8, 122.9, 123.0 and
123.05 unless they're talking to PDX control.
Many ham radios have the ability to configure their receivers to
pick up a usable AM signal. From the perspective of the RF front end
on the radio, it's all the same no matter how it's modulated. Since
many modern radios use digital demodulation methods, it's little
more than a change to the software to get AM signals into the audio
amplifier, instead of FM.
The same is not true however for transmitting. With clever radio
design it *could* be done, but there's no legal place in the ham
band where AM modulation is permitted. If a radio manufacturer
tried to get their new radio past the FCC with that feature in place,
I suspect they'd be rejected. They get away with having mod features
in there because these radios are sold worldwide and the rules about
what frequencies are legal vary by jurisdiction. But I don't know of
anywhere that ham radios operate AM in the 2 meter band for communication.
The lone exception is ARDF (Amateur Radio Direction Finding), aka
"Fox Hunting", where you plant a low power transmitter somewhere
and send your friends out with directional antennas and receivers
to try to find it. Those are sometimes modulated both AM and FM,
because you can use very sensitive AM receivers more easily for
DF tasks.
You may find a combined radio that does both ham and aviation band,
but the one I heard about was essentially two independent radios in
one package, and rumor had it that it did a lousy job on both. I fly
the ultralight with an Icom A6 handheld clipped to the panel and it
works fine for talking to other aircraft and air traffic control. If
you're flying powered, I'd recommend that radio for keeping in touch
with local traffic.
MGF