From: "Ed Price"
Subject: Re: How to check for a 50 or 75 ohm connector
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
Date: Mon, 23 Dec 2002 09:21:44 GMT
NNTP-Posting-Date: Mon, 23 Dec 2002 04:21:44 EST
Organization: Cox Communications
"DarkMatter" wrote in message
> On Sun, 22 Dec 2002 19:53:14 +0000, John Woodgate
> Gave us:
> >I read in sci.electronics.design that DarkMatter >endoftheuniverse.org> wrote (in >com>) about 'How to check for a 50 or 75 ohm connector', on Sun, 22 Dec
> >> One can purchase the simple "consumer electronics" "F" style
> >>connector in a number of cable termination sizes. Depending on WHICH
> >>cable gets used, the impedance will differ. The PLUG side, however is
> >>ALWAYS absolutely identical.
> >Since the 'centre pin' of an F-connector plug is the inner conductor of
> >the cable, I don't see how it can always be the same size!
> Ok OK. In the case of the "F" connector, which utilized the center
> pin of the cable itself yes. I knew that, but missed it in my
> statements. You are correct. It is, however, proven more so by that
> remark that the impedance is determined by the cabling, not the
> This would also be the reason why "F" type connectors have such wide
> spread ability on the female center conductor grasping tines.
> RG-6 center wires are a lot bigger than an RG-174. An RG-174 "F"
> type connector, however is one of the few that do NOT use the center
> wire as the "stinger", they have solder cups and hard mounted center
> pins. A much more expensive termination.
> You caught me with my QA reviews of my posts down. :-]
The F connector is a system; that is, a connection requires both a male and
female connector. Most of the impedance discontinuities occur in the female
half of the system, due to those "grasping tines".