[ih] Arpanet physical connectors

Carsten Bormann cabo at tzi.org
Thu Jul 23 22:42:04 PDT 2020

On 2020-07-24, at 05:38, Noel Chiappa via Internet-history <internet-history at elists.isoc.org> wrote:
> 48-16R18-31P
> 48-10R-18-31S

The PDF I cited explains it:

16R: Bayonet, Straight Plug, Meets MIL-C-26500 (USAF)
10R: Bayonet, Square Flange Receptacle, Meets MIL-C-26500 (USAF)

P: Pin
S: Socket

(The one additional hyphen is spurious.)

18 = shell size (outer diameter 1.375 in = 34.925 mm)
31 contact points!

MIL-C-26500 makes it possible to buy the thing today.  
Found one for approx $30 at mouser (plus the pins/sockets, sold separately!).
And yes, special order…

I think I’ll buy one for our little networking museum — should be here by the time we can do face-to-face teaching again :-)

Grüße, Carsten

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