[aprssig] APRS antenna for an airplane
Joe Della Barba
joe at dellabarba.com
Sat Sep 16 11:08:56 EDT 2006
I have used a rubber duck on a suction cup extension cable. I have also
used a wire dipole taped to a window, a spare aircraft-band antenna that
was intended for an aircraft band H/T, and a 1/4 wave mag mount on
Cessna landing gear. All of the above have done fine for APRS tracking
with a 2 meter H/T. If you own the airplane there are plenty of aircraft
antennas available for VHF business band that would work fine. Or you
could buy a wire aircraft antenna and trim it down a bit.
73
Joe N3HGB
w2kb at comcast.net wrote:
> A previous owner of my '76 Cessna Cardinal had an extra aircraft
> antenna mounted on the belly with a cable terminated with a BNC
> connector in the cockpit so that an aviation handheld could better be
> used as a backup should both the regular transceivers fail. I
> recently tried the antenna with a Kenwood D700 running at the lowest
> transmit power setting and it works fine. (I don't want to trim the
> antenna length to better preserve its backup use.)
>
> 73, ---Ken W2KB N16019
>
>
> -------------- Original message --------------
> From: Earl Needham <needhame1 at plateautel.net>
>
> > At 01:15 AM 9/16/2006, Andrew Rich wrote:
> > >Any suggestions ?
> >
> > I've used an HT with a rubber duck to check into a repeater net
> > 200+ miles away, so you'll be able to get SOME results with
> almost anything.
> >
> > The suggestion to use an inspection panel is a good one, but if
> > CASA is a problem, you could simply have another aviation
> antenna added and
> > use that. It would help if you could get it tuned for 144
> instead of 120,
> > but I suspect it would work in either case as long as your
> transceiver
> > could tolerate the mismatch.
> >
> > BTW, if you normally fly pretty high AGL, then mount the antenna
> > on the belly. However, if you normally fly low, like a crop
> duster, you
> > might be b etter served by mounting the antenna on top.
> >
> > 7 3
> > Earl
> >
> >
> > Earl Needham, KD5XB, Clovis, New Mexico DM84jk
> >
> >
> >
> > _______________________________________________
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>
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