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I agree totally with Jon's approach here. Whereas I have had some success with the simpler piezo based broadband hydrophone system, I am not rehearsed with the higher ultra sonic frequencies. We as a group should support the individuals already researching this valuable area of homing and tracking sonar as we as a group will no doubt benefit from its outcome. In that spirit of support, is there anything I can contribute in the way of funding or materials to the individuals working in this area of research. I am fully aware that research and development can be both costly in both time and materials. Simply contact me off list and I will aid where possible. David Bartsch > Date: Mon, 15 Mar 2010 10:25:16 -0400 > From: jonw@psubs.org > To: personal_submersibles@psubs.org > Subject: Re: [PSUBS-MAILIST] Desert Star Sport > > > Vance, > > You mentioned UQC instead of pinger. Is that what you meant? Al Secor > is working on a UQC solution, and Lea Nichols is working on a separate > UQC solution independently. I believe both are expecting to have units > available for inspection and appraisal at the July convention. I also > believe it would be rather simple to include a "pinger" function in the > UQC once they get the electronics figured out for communication. > There's nothing wrong with a third UQC project I suppose, but before > anyone goes off spending money on it they may want to wait to see the > results of the current projects. > > If a separate pinger project is warranted, then we should formulate a > list of requirements first to ensure the project is as productive as > possible. Among those that I see to start off would be: > > 1) Pinger frequency as standardized by ABS (32khz?) > 2) Omnidirectional transducer for submarine > 3) Directional transducer for tracker. > > It looks like Reson has a set of transducers that *might* work at 32khz, > although the specs for TC1026 say that it will only reach down to > 34khz. It will be interesting to see what they return for a price. > This is probably a good time to announce that I have secured special > member pricing for AIRMAR transducers from a US distributor. > Unfortunately, AIRMAR does not produce a 32khz transducer so is not a > resource for an ABS type pinger. The distributor is a supplier of > marine products and have other items that may prove useful to psubbers. > I will send a more detailed message out to members soon. > > Given that ABS standardized on 32khz, I'm a bit surprised that we are > having such a hard time finding suppliers with 32khz centered > transducers. I think it is worth contacting ABS to find out "what > gives?" on this standard. One would assume they didn't randomly select > 32khz. > > Jon > > > > vbra676539@aol.com wrote: > > Andy, > > I put a request in to Reson this morning for a transducer quote. A > > basic UQC is simple electronically (or so I've always been told). If > > the transducers aren't out-of-this-world expensive, do you think we > > could group up and figure out a base unit to drive it? With all > > David's work, it seems likely that we could. Then we could have a > > home-grown system. The transducer itself is actually the most > > difficult part for the home-builder. If we can get that within our > > reach, couldn't we just build our owna? Or maybe lock David in the > > basement with a shopping cart full of parts and enough pizza to keep > > him alive until he gets them all built!! If that seems even slightly > > reasonable, do you have any other ideas (cheaper) about proper > > transducers for this application? > > Vance > > > > > ************************************************************************ > ************************************************************************ > ************************************************************************ > The personal submersibles mailing list complies with the US Federal > CAN-SPAM Act of 2003. Your email address appears in our database > because either you, or someone you know, requested you receive messages > from our organization. > > If you want to be removed from this mailing list simply click on the > link below or send a blank email message to: > removeme-personal_submersibles@psubs.org > > Removal of your email address from this mailing list occurs by an > automated process and should be complete within five minutes of > our server receiving your request. > > PSUBS.ORG > PO Box 53 > Weare, NH 03281 > 603-529-1100 > ************************************************************************ > ************************************************************************ > ************************************************************************ > Hotmail has tools for the New Busy. Search, chat and e-mail from your inbox. Learn More. |