On Mon, 12 Jan 2004 23:26:00 -0600, "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?

Yes - it's a question of how much current the crystal can handle in
terms of RMS power from the signal transmitter - if they are older
transducers, it's a pretty safe bet they will handle 600 watts.

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

Jeeze - those can be anywhere from 25 to 200 Khz. depending on their
age and what they came off of.

Are there any identifying marks on them?

Later,

Tom
S. Woodstock, CT
----------
"My rod and my reel - they comfort me."

St. Pete, 12 Lb. Test