Marine Radio using Aviation Antennae

Doug,

Most aircraft antenna's are 1/4 wave length (about 22 inches.) A quarter
wavelength on marine frequencies is approximately 17 and a half inches.
This is out of the range of most handheld matching circuits. My conclusion
is that the answer to your question is no.

Wayne
http://www.soaridaho.com/Schreder


"Doug" wrote in message
...
I want to get a handheld marine radio for my amphib Husky. I wouild like
to
plug it in to my aviation outside antennae that I have installed for my
aviation handheld. Will this work? Marine frequencies are
a.. TX 156.025-157.425 MHz
b.. RX 156.025-163.275 MHz
(from the Icom web site).

You could try the Ham radio market. What you are looking for is an
Antenna Tuner
for the 70cm band. What you want is an antenna tuner that can capactively
"shorten" the 22" aircraft antenna and cause it to match the frequencies
that would
normally use a 17" antenna. You might want to look at www.aesham.com.

Wayne Paul wrote:

Doug,

Most aircraft antenna's are 1/4 wave length (about 22 inches.) A quarter
wavelength on marine frequencies is approximately 17 and a half inches.
This is out of the range of most handheld matching circuits. My conclusion
is that the answer to your question is no.

Wayne
http://www.soaridaho.com/Schreder


"Doug" wrote in message
...


I want to get a handheld marine radio for my amphib Husky. I wouild like


to


plug it in to my aviation outside antennae that I have installed for my
aviation handheld. Will this work? Marine frequencies are
a.. TX 156.025-157.425 MHz
b.. RX 156.025-163.275 MHz
(from the Icom web site).

"Buff5200" wrote in message
...
You could try the Ham radio market. What you are looking for is an
Antenna Tuner
for the 70cm band. What you want is an antenna tuner that can capactively
"shorten" the 22" aircraft antenna and cause it to match the frequencies
that would
normally use a 17" antenna. You might want to look at www.aesham.com.

No. The 70 cm amateur band is around 440 MHz -- way above 160 MHz.
The marine frequencies would be closest to 2 meters, and not all that close.

I think a dedicated antenna is going to be simpler, cheaper, and work
better.

Jim, I believe at one time you posted a pointer to an advisory circular of
best practices for installing non-aviation band radios in aircraft. Maybe
you could dig that out again.

Tim Ward

Tim Ward wrote:



No. The 70 cm amateur band is around 440 MHz -- way above 160 MHz.
The marine frequencies would be closest to 2 meters, and not all that close.

I think a dedicated antenna is going to be simpler, cheaper, and work
better.



Sorry, my misprint, I meant a dual band 2M/70cm tuner.

Absolutely, a dedicated antenna is the best move. Unless you are trying
to mount an extra antenna
on a certified aircraft. Lots of paperwork and $$$. I was speaking to
the concept of using a HT marine
radio on an antenna "normally" used for aviation band, and already
installed in the airframe.

"Buff5200" wrote in message
...


Tim Ward wrote:



No. The 70 cm amateur band is around 440 MHz -- way above 160 MHz.
The marine frequencies would be closest to 2 meters, and not all that
close.

I think a dedicated antenna is going to be simpler, cheaper, and work
better.



Sorry, my misprint, I meant a dual band 2M/70cm tuner.

I understood you to mean an antenna tuner.


Absolutely, a dedicated antenna is the best move. Unless you are trying
to mount an extra antenna
on a certified aircraft. Lots of paperwork and $$$. I was speaking to
the concept of using a HT marine
radio on an antenna "normally" used for aviation band, and already
installed in the airframe.

That's why I mentioned Jim Weir's previous posting of a pointer to an AC
about mounting non-aviation radios in airplanes. I think last time it was
in connection with amateur radio in an airplane, but the principals would be
the same.
Tim Ward

While on the subject of antennas, having built a couple of Jim´s plumber
delights, could this antenna design in principle be used for any bands or
can it only be built for center frequencies within the VHF-band? You see, I
have this little cute Yaesu scanner and I´d love to build a few more
antennas for it, base antennas that is. I already have a set of homemade
portable antennas for it out of bnc connectors with welding rod sticks.

Cheers, Ken
Finland