Geoffrey S. Mendelson wrote:
Jasen Betts wrote:
The car radio antenna plug if often called "Motorola"
no doubt it has a technical name too, but Wikipedia
doesn't seem to know it.

Why can't Motorola be it's proper name? It was "invented" by Motorola.
It's a longer version of the the RCA connector, "invented" by RCA.

Probably at one time RCA had a patent on its connector and Motorola
had a patent on theirs.

It wasn't until the second world war that the concept of standarization
across manufacturers was pushed. Companies made their own parts,
connectors, etc, and tried to prevent competion.

A car antenna connector (AM band) has an "inside-out" shell:
http://shop.vetcosurplus.com/catalog...e.php?pID=8818

Hope This Helps!
Rich