The Amphenol "86" series of plugs included the 8-pin that was identical to the base of an octal tube. Basic number was "86-CP8". The suffix numeral showed the pin count. The radio above has a 86-CP9 sticking out the rear. The mating socket was the series 78 connectors. Original catalog number for the socket to fit that radio would be 78-S9.
The word octal really does mean 8. Just the same, the 86 series plugs and matching sockets still get called "octal" no matter how many pins are around the center plastic pilot. Pretty sure it's that center pilot with the polarizing ridge that's the reason.
73
The word octal really does mean 8. Just the same, the 86 series plugs and matching sockets still get called "octal" no matter how many pins are around the center plastic pilot. Pretty sure it's that center pilot with the polarizing ridge that's the reason.
73