Doug,
On the website, go to members projects/hydrophones for a good depiction. It is made from a 1 1/2" PVC pipe coupling with very short segments of pipe installed (not longer than the diameter of the "o" ring used) These short segments prevent this o"ring from collapsing inward. The sensing device is simply a 27mm in diameter piezo element super glued to the inside face of a plexiglass wafer. The back wafer is made out of aluminum and a compression fitting along with a smaller "o" ring comprise the cable thru hole (This is "gooped" with cylicone afterwards to ensure a really good water tight seal.
Jon informs me that all of the how to information will soon hit the website also...Let us just give hime some time...In the mean time, I will produce extra hydrophones should you still need some...These work really good!
&n
bsp; David Bartsch
To:
personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Hydrophones
Date: Fri, 29 Aug 2008 23:30:53 -0400
From:
djackson99@aol.com
David
I'm interested. Do you have a photo of your hydrophone or have you not built one yet?
I love to have those plans and post them on my site, but I'd need you to explain the assembly in enough detail that the average high school student could put it together. It would be best to take photos of each step of the assembly. I know is a lot of work, but I think it would really be appreciated. It would be useful to have on an ROV too. Could you also do a beacon?
Have A Nice Day.
Doug
www.submarineboat.com
< /div>
-----Original Message-----
From: David Bartsch <
dbartsch2236@hotmail.com>
To:
personal_submersibles@psubs.org
Sent: Fri, 29 Aug 2008 8:14 pm
Subject: [PSUBS-MAILIST] Hydrophones
Frank,
I will in the weeks ahead produce the single
hydrophone intended for installation aboard your boat. This is being done so that you could mount this device early with the use of the proper thru-hull fitting. It can be placed within a ballast tank and will hear thru this as long as water is present on both sides. This will not create additional drag if installed in this or likewise manner. I will set up a small process whereby many can be produced at the same time...So....
Does anyone else want a preproduced hydrophone for installation aboard other submarines or for perhaps testing? Perhaps the how-to-instructions so that you could build your own?
I used an all electronics preamp kit and all electronics 7watt amplifier kit and these worked great together allthough other electroni
cs could provide equally good results. Go to allelectronics.com for ordering info. The preamp was less than $10.00 with the 7watt amplifier close to $15.00. All that is left is a small 12vdc battery and a small project box to fit it all in withy the panel controls and on/off switch.
If you want to take this plunge, here is a great chance to dive in.
David Bartsch
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