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Thanks David,
I'm really interested but will wait to see what Divelink come back with before
making a final decision. It's fantastic you're doing this, I appreciate it.
While a single sideband unit from OTS is probably the ultimate, I really
like something that we can build ourselves and 350' sounds like sufficient for
most PSUBS operations.
Basic
question... I have a marine VHF sitting on a shelf. Is it possible to leverage
that so that underwater it would transmit/receive through a hydrophone instead
of the antenna? Sorry if this is a completely ignorant question, but it's just
provoked by the fact it already has a handset, speaker, and
amplifier. I'm envisioning the addition of a switch between surfaced mode
(antenna) and submerged (hydrophone), but imagine it couldn't be that
simple. This is something I really know nothing about.
thanks,
Alec From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of David Bartsch Sent: Tuesday, May 19, 2009 02:06 To: personal_submersibles@psubs.org Subject: RE: [PSUBS-MAILIST] system completetion Dean just received his console #4 and has placed a request for yet another unit. Seems he wants one for his support craft as well. Les already has two units and posted some test results from earlier this year. He cut holes in the ice on a nearby pond and was able to cross talk some 350' apart. The system I have developed is a basic communications system that uses an underwater speaker and the listening device is our HBH-2 hydrophones. Two boats simply talk back and forth. There is no carrier so as ambient noises rise, the range will diminish. I looked into "underwater speakers" and actually bought one only to find the maximum operating depth was but 14'. (This would have been real useful to us) I have discovered that by installing a sound device for solids into a metal dish and pouring two part molding plastic, you can make an underwater speaker capable of going down quite deep. (exactly how deep is yet to be established) This special transmitter is not expensive and can be seen under special projects under my name and "UW COMMS". The cost for a complete system including two passive hydrophones and this voice transmitter is $245.00 and in most instances, this includes shipping. A cb styled handset automatically shifts the unit from receive to transmit and back again once the message is sent. The basic block diagram is on the last picture under UW COMMS and I will aid anyone who wishes to make a unit of like construction on their own. The preamplifiers and amplifier cards are kits from various suppliers that anyone with a little time and patience can put together. The battery is self supplied and is 12 vdc. (this negates the need to ship lead) The goal was to make available a simple to use underwater communications set that will allow two submarines to talk to each other while both are up to 500' down and 500' apart. Talking from sub to support vessel without surfacing would also be nice. Dean has yet to try out his latest toy, but from those that have ventured into the world of underwater sound with these things, I have no complaints. At present, console #1 is with Frank D. in California, #2 and #3 are with Les Katschor in Michigan, #4 and soon #5 will be with Dean Ackman, and more will follow. These are easy to build, repair and maintain and should make submarine activity safer as these consoles allow for the listening of ambient noise such as boat traffic. The newest attempt at a sonar system is essentially only a single amplification channel for listening only. This should be great for collision avoidance. If you think you would enjoy a simpler form of communications with in-club support, just give me the word. David Bartsch Subject: RE: [PSUBS-MAILIST] system completetion Date: Mon, 18 May 2009 13:34:08 -0400 From: Alec.Smyth@compuware.com To: personal_submersibles@psubs.org Hi
David,
I'm
getting my sub ready for the summer and one repair item was the Divelink
comms. One of the units failed and I just posted it to the manufacturer who will
test and provide an estimate for repair. They may come back with some silly
number. So I was wondering what the latest is on your version? Did Dean get to
test this?
thanks,
Alec The contents of this e-mail are intended for the named addressee only. It contains information that may be confidential. Unless you are the named addressee or an authorized designee, you may not copy or use it, or disclose it to anyone else. If you received it in error please notify us immediately and then destroy it. From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of David
Bartsch
Dean,Sent: Sunday, May 10, 2009 02:17 To: personal_submersibles@psubs.org Subject: [PSUBS-MAILIST] system completetion Your passive sonar/underwater communications console #4 is completed and has passed all of the initial in-lab performance testing. This electronic enclosure along with its two passive hydrophones (HBH-2) and single broadband voice transmitter will be shipped out to you on Monday, May 11th via U.S. Postal Priority mail. A simplified set of laminated operating instructions will also be provided. I am pleased with this systems performance as I am sure you will be also...good luck with your submarines launch and call should you have any questions. David Bartsch Hotmail® has ever-growing storage! Don’t worry about storage limits. Check it out. Hotmail® has ever-growing storage! Don’t worry about storage limits. Check it out. |