[Collins] Need help with connector

[root]

On Thu, 2005-03-24 at 12:51 -0500, PRH at aol.com wrote:
> Recently arrived PM-2 had had its power cord made removable. Don't know if  
> this was a common mod but did buy it from a fellow in Cedar Rapids.
>  
> Anyway, power jack is same footprint as an SO-239, looks like an SO-239  with 
> the interior phenolic removed and replaced with 2 pins and the metal  
> surrounding it has a little pip in it to key the connector. An ideas, help would  be 
> greatly appreciated. Be glad to send photo if it'll help.
>  
> Thanks.
>  
> Paul K2PH (at arrl dot net)

Three possibilities immediately come to mind. Depending on diameter, pin
diameter and how much the pins are recessed.

One is the Amphenol 2 pin microphone connector, like the MC2M family.

The other is a Pacific rim 2 pin microphone connector.

Neither is a great common power connector, and both chassis mount use a
ring nut.

Or it may be a 2 pin MIL spec connector. It will have a larger shell and
stronger though maybe not fatter pins. It may mount with a four bolt
flange. It should have some numbers visible on the insulator or the
flange or both. Probably 10SL-4 or 12S-3. Both these were used for
military equipment AC power connections before the advent of grounded
power cords. The shell threads for these connectors are 5/8-24. The
mating connectors are available in surplus stores, from Allied and
Mouser.

73, Jerry, K0CQ, Technical Adviser to the CRA