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Ah, tenks you beddy much. I was never in the
navy so I wouldn't know.
Rick
----- Original Message -----
Sent: Thursday, April 10, 2008 3:41
PM
Subject: [PSUBS-MAILIST] UQC
Never heard of it? UQC is navy speak for underwater acoustic
communications and has been an industry and military standard since the 1950s.
Vance
-----Original Message-----
From: Rick and Marcia <empiricus@telus.net>
To: personal_submersibles@psubs.org
Sent:
Thu, 10 Apr 2008 12:18 pm
Subject: Re: [PSUBS-MAILIST] radio link
Hi, again - My sub will be an ambient so scuba
depths are my operating limits for towing. This is also a temporary
measure and I'll have Coast Guard backup during trials. With auxiliary
floats set up right, fouling shouldn't be a problem (famous last
words).
You mention UQC. Could you fill me in a
little more? This seems interesting. Is it established as a form
of u/w communication? Sub-to-sub? I've never heard of
it.
Rick
----- Original Message -----
Sent: Thursday, April 10, 2008 3:15
AM
Subject: RE: [PSUBS-MAILIST] radio
link
Yes
it will, you just have to be careful of submerging the antenna while
transmitting which will result in blowing your transmitter. The
tourist sub I was considering being the maintenance manager for used a
similar arrangement but didnâ??t dive deeper than 50 ft. Anything
trailing from a sub is at great risk of fouling especially in
thrusters/prop. Ultrasound (UQC) is the best way to go.
R/Jay
Respectfully,
Jay
K. Jeffries
Andros
Is., Bahamas
Vive
vt vivas
â??
Live that you may live
Hi, Jay -
so if I have a VHF onboard and run an antenna cable to a float (with
the antenna attached above water) that would work?
----- Original
Message -----
Sent: Friday, April
04, 2008 3:48 AM
Subject: RE:
[PSUBS-MAILIST] radio link
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
â??
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
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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