[Milsurplus] Twinax Coax connectors

[KD7JYK DM09]

Are they the relatively rare "twinax" like the 390 uses, or the absurdly 
common in every configuration known to mankind "twinax" that was used in 
computer networking for decades?

The R-390 model looks like a PL-259 UHF connector with two thick pins, the 
computer network version has two very small pins, but different and more 
unique to it is a "key" so it can only be connected one way.  Looking at the 
connector, you'll see a key in the male and a slot in the female for 
polarization.

I've only ever seen one R-390 type twinax male, which I have, I have a few 
hundred pounds of the computer networking twinax connectors in many, many 
configurations in storage somewhere, used to use them for powering 12 Volt 
equipment in the field.

Kurt