HISTORY:
For a more extensive story relating to these octal plugs/sockets and boots, take a look at the TELETRON octal plug I am advertising, it is HERE
McMurdo appear to have been a British company but they also "set up shop" here in Australia as well, back in the 1950's ~ 1960's
This is just the "boot" which is intended to friction fit over an octal line plug or socket and protect the user from high voltages on those plugs and sockets.
McMURDO (Australia) - Valve Socket
Part # Unknown
McM AUSTRALIA (stamped into the rear of the boot, near the metal cable strain clamps)
Often used with 8 Pin octal line plugs & sockets but I have seen other pin configurations use these as well - its all in the diameter!
Material: flexible Black plastic - this is not rubber
Two part cable strain relief clamp at the rear, two screws securing the cable at entry
Inside the front of the boot is a recess, this friction fits over a mating flange on the octal plug or socket.
This type of joint is secure although it does "move around" and is not rigid - it does the job though.
DIMENSIONS:
30mm OD x 30.5mm depth (plenty of empty space for the cable connections inside)
26.8mm ID which means the inside recess is approximately 1~1.5mm deep, I cannot measure this accurately with my micrometer due to the weird angles I need to measure!
Cable strain relief will cope with a minimum 4.5mm diameter cable sheath or loose wire "snake". I did notice the clamp securing screws are quite short so if you were fitting a larger diameter cable, you may need to obtain longer screws for the clamp.
COSMETIC CONDITION:
NEW Unused but very old stock
Clean
NO damage to the body or the rear cable strain clamp
As mentioned above, I made a "test fit" between this boot and a Teletron octal plug. When fitted together, there is "play" between the two, the fit is not rigid. Mostly importantly though, it takes a bit of prying at the edge of the boot to remove the plug - that's a good thing when you have high voltages floating around inside at the rear of the connector inside the boot.
I have now placed this boot into a sealed clear plastic packet.
