Hydrophone Plans

[shawl@torchlake.com (Jonathan Shawl)]

I just found this. It is the address to the page that contains the
Hydrophone Plans.
It looks interesting to me!
Photo of it on the page....

http://www.angelfire.com/ks/diyplans/hydro.html

Plans include: Complete Step-By-Step Assembly Instructions for
Transducer and Related Components, Full Size Template
for PC Board, Parts Placement Diagram, Parts List (most available from
Radio Shack or other electronic supply house), 3D
Drawing of Components.

Price: $21.95 + $3.00 shipping US or $21.95 + $7.50 International.
Must be payable in US funds.