[Boatanchors] Coax Connectors

[Revcom]

After reading all the threads on Coax connectors, it got me thinking (dangerous)
and doing some research in my old texts and reference info.

N Connector, sometimes called "Navy" where it was used predominately
for freqs above 30 or so MHz.  Invented by Paul Neill of Bell Laboratories.
Comes in both 50 and 75 ohm designs.  Do not try to mix them, different
pin sizes.

BNC Connector, "Bayonet Neill-Concelman" connector, Neill worked with
Carl Concelman, an Amphenol engineer.  Concept came from work done
by Octavio Salati, in 1945, he worked for Hazeltine Electronics. Made in
both 50 and 75 ohm styles. 75 ohm models do not have any dielectric
or only a very thin amount on the inside.  Cable TV uses a LOT of these.
Have seen it called "Bayonet Navy Compact" and other names.

TNC Connector, "Threaded Neill-Concelman", same specs as BNC but
threaded attachment.  It also comes in 50 and 75 ohm styles. Ditto on
names used.

All are available in both Solder, Solderless and Crimp configuration.  The
crimp style is all we use in shop here.  And I believe is used exclusively
in aircraft installations, no solder joints to crack.

Major design simularity is you can cut off the attaching ring, bayonet or
threaded style and interchange all the types.  They have same interior
size.  All do NOT depend on the attachment for circuit connection, a 
true coaxial connector.  Much different than convention UHF/Mini-UHF
which are terrible connectors unless very tight.

Just my input, be it useful or no.

Rod
K0EQH