NASA Echo Sounder

[bryandowdey]

Does anyone have a circuit diagram for the classic rotating NASA Stingray Echo Sounder?
I have what looks like a brand new unit. It rotates, flashes the LEDs but bears no relationship to the depth of water under the hull!
As a hobby electronic enthusiast, I thought I would try to find the problem but I don't have a circuit diagram.
A photocopy or E-mailed attachment would be much appreciated!

 

[rwh]

Why not contact Nasa Marine directly? They are good people to work with and I am sure have what you are looking for.

 

[BarryH]

I've got the same echo sounder, its the stingray twin, LED's and the digital readout. If you give me a pm with your email address i'll scan it and send it as an attatchment .

Regards BarryH