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From: Ian Walker
Subject: Re: How to check for a 50 or 75 ohm connector
Date: Sun, 22 Dec 2002 15:15:52 +0000
NNTP-Posting-Date: Sun, 22 Dec 2002 16:00:58 +0000 (UTC)
User-Agent: Turnpike/6.02-U ()
In article <firstname.lastname@example.org>, DarkMatter
> ALL BNC connectors are the same shape on the connector side. ALL "f"
>type connectors are the same shape on the connector side. ALL "RCA"
>type connectors are the same shape on the connector side. Starting to
>make sense yet?
> Since one can have both 75 and 50 ohm versions of each cable type yet
>still retain the moniker for the connector, the cable end of the
>connectors mentioned are the only things about them that change as said
>cables change. The connector side is standardized, however. The world
>would be a huge mess otherwise.
Wrong! Whilst 50 and 70 ohm N (BNC) type connectors are both N (BNC)
type they are incompletely described by calling them N (or BNC) type.
You must also specify the impedance for correct electrical (and
mechanical in the case of N type) performance, the type of cable
providing it is suitable for the connector is irrelevant (i.e. you can
have RG-174 on one side of an N system and RG-203 on the other).
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