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Hi, Max - thanks for that. I'll stay tuned .
. .
Rick
----- Original Message -----
Sent: Sunday, April 06, 2008 11:45
AM
Subject: Re: [PSUBS-MAILIST] radio
link
I passed the concerns on to my HAM friend and he's going to
bring it up to his club and see what they have to say. I'm no expert,
but I'll forward anything they have to say.
Give them a week or so, and
I'll update this thread then.
On Fri, Apr 4, 2008 at 5:48 AM, Jay K. Jeffries < bottomgun@mindspring.com>
wrote:
The antenna length for VLF
and energy requirements for the radio will far surpass that of a VHF
radio.
R/Jay
Respectfully,
Jay K.
Jeffries
Andros Is.,
Bahamas
Vive vt
vivas
? Live that you may
live
Hi, Max - sorry for the late response, I've
been overseas.
Thanks for the great info. Now to
decide whether VLF would be easier to implement than a hard-wire to the
float. Guess the ham guys will fill me in there. I know that VLF
carries less information - or is that ULF . . .
Cheers and thanks again
:-)
----- Original Message -----
Sent: Saturday, March 08, 2008 7:04 PM
Subject: Re: [PSUBS-MAILIST] radio link
Rick,
My HAM friends tell me you are
looking for a Very Low Frequency (VLF 3KHz - 30KHz) set up like the
military uses, and the good news is that you can DIY one fairly
easily. (So they said.). I believe that this frequency gets
some 20 meters of penetration, but that's just a ballpark rumor I
have.
I haven't built one, but I'm connected to some hams in Napa
and Washington state and would be happy to get you some contact
information if you're interested in talking to them. They will have
the math at their fingertips to tell you what your power and range
requirements will work out to. They'd also know how to avoid
stepping on any legal and military toes.
http://www.radio-flier.com/diy_corner.html -
you'll find VLF for an example receiver. I would advise
google/shopping around for more information.
I'd bet the HAMming
community would be happy to help someone building a PSUB. It just
seems like the hard-science, unique kind of projects they
enjoy.
--Max Elliott
On Sat, Mar 8, 2008 at 6:29 PM, Rick and Marcia <empiricus@telus.net> wrote:
Has anyone figured out how
to establish a radio/video link with a surface vessel?
My somewhat non-tech mind
is thinking of a hard-wired connection with the antenna attached to a
diver's float.
How far from the
transmitter can you run an antenna?
I have offers from the
Canadian Coast Guard to act as standby divers but I'd like to give them a
play-by-play on her maiden voyage.
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