Re: [PSUBS-MAILIST] Desert Star Sport

[Jon Wallace <jonw@psubs.org>]

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




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