NASA Stingray power cable

[Amulet]

I have an surplus NASA Stingray sounder which I promised to someone who can use it.
Can't find the power cable. It is a female which goes on to three pins, though my recollection is that it had five holes of which only two were used to connect 12 volts to the correct pins. Can someone tell me what that kind of plug is called, and which two pins take the +ve and -ve?

 

[electrosys]

What you want is a 3-pin DIN in-line socket - similar to Ebay # 290350316000 - but I'd recommend using the plastic-bodied version.

When looking at the Stingray sounder from the back, with the power socket at the bottom, there are 3 pins, with the centre pin at the bottom. The lefthand one is the +ve, the other two are both ground (-ve). Inside the Stingray the +ve supply is diode protected, so you can't damage the box if you inadvertently screw-up the connections ....

(Of course you can use a DIN inline connector with more than 3 connections - the others are simply not used.)

 

[Amulet]

What you want is a 3-pin DIN in-line socket - similar to Ebay # 290350316000 - but I'd recommend using the plastic-bodied version.

When looking at the Stingray sounder from the back, with the power socket at the bottom, there are 3 pins, with the centre pin at the bottom. The lefthand one is the +ve, the other two are both ground (-ve). Inside the Stingray the +ve supply is diode protected, so you can't damage the box if you inadvertently screw-up the connections ....

(Of course you can use a DIN inline connector with more than 3 connections - the others are simply not used.)

Thanks a million. That's exactly what I need. I have a 5 pin DIN plug. The pins are down a deep hole in the back of the instrument, so I need a plug which doesn't have a huge wodge of plastic round it. I think Maplins have one.