[Paddlewise] VHF antenna

>>>From: "Peter Rattenbury" <ratten_at_uow.edu.au>
Evan, Are you looking to make up a temporary or emergency VHF antenna to
pick up the international marine VHF frequencies...? [snip]

Remember that this emergency antenna is less efficient on transmit than
the rubber ducky, especially if you are using several metres of coax.<<<

Sorry, I'm on the digest version of Paddlewise, so I just got your posting.
The primary idea I had was an antenna for emergency transmission, presumably
in the neighborhood of 157 MHz.  Secondary use would be to improve reception
in remote areas.

However, if as you say, this arrangment works less well than the rubber
ducky antenna for transmission, then there's less incentive for me to do
this.  Are you saying the quality of the transmission would be poorer, even
though the range would be farther (due to being elevated higher)?

I've been having a hard time finding a sketch of a J-pole antenna, other
than the kind of home-builts that people make out of copper pipe and mount
to their homes.  Also, the terminology for things like "tap", "stub", and
"radiator" does not seem to be consistently used with the sketches I was
able to find.

Thanks

Evan Dallas
Woodinville, Washington
***************************************************************************
PaddleWise Paddling Mailing List - Any opinions or suggestions expressed
here are solely those of the writer(s). You must assume the entire
responsibility for reliance upon them. All postings copyright the author.
Submissions:     PaddleWise_at_PaddleWise.net
Subscriptions:   PaddleWise-request_at_PaddleWise.net
Website:         http://www.paddlewise.net/
***************************************************************************