My situation is a little different. I've got a boat built around 1960, it's
got a thru-hull transducer with no markings. Presumably it's a little more
modern than 1960's!
Assuming that I can estimate the resonant frequency ( I've got only a
frequency generator and a decent multimeter, ) how do I decide if it's worth
while getting a plug to adapt the transmitter to my Lowrance X48?

Or do I just wait a year until I pull the boat out of the water for annual
maintenance and fit a new thru-hull transponder?
Regards
David
"Bruce in Alaska" wrote in message
...
In article ,
"RB" wrote:

Just found a couple of old transducers tucked away in a desk drawer in
my
workshop. No clue as to what they're from, make, model, etc, nor as to
operating frequency.

If I recall correctly, the freq is the most important characteristic.
Also
seems like the other thing is not to stick 'em on some depth finder that
overpowers them and pops the circuit that fixes the freq. Is all this
correct?

If so, what's some practical, reasonably simple way to determine their
design freq?



Most of the Professionals would use a Signal Generator, Scope, and
Impedance Bridge, and then sweep the transducer to determine its
design frequency. Shoudn't be to hard if you got the test equipment.

Bruce in alaska
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add a 2 before @