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Re: [TowerTalk] N - clamp style connector

To: "Tower and HF antenna construction topics." <>
Subject: Re: [TowerTalk] N - clamp style connector
From: jimlux <>
Reply-to: "Tower and HF antenna construction topics." <>
Date: Wed, 10 Mar 2010 20:33:22 -0800
List-post: <">>
Steve Katz wrote:
> As someone who's actually set up assembly lines to install Type N
> military connectors for USAF contracts (20+ years ago!), I might add one
> of the biggest problems hams have is misapplication of connector vs.
> coax.  Even a skilled expert who's assembled thousands of N connectors
> on cables is going to be highly challenged if the right materials aren't
> presented to him.
> As an example, I see a lot of hams using the UG-21D/U connectors from
> the Amphenol "RFX" series (82-202-RFX or equivalent).  You might note
> those are intended for "RG8, RG9, RG213, RG214" cables.  Well, this is
> downright impossible.  RG8 and RG213 are single shielded and smaller in
> O.D. than RG9 and RG214 which are double-shielded.  For a "clamp"
> connector, how can a single design work for cables having either one or
> two shields, and having two different O.D.s?  Impossible.
> So what Amphenol did, in their infinite wisdom, was make the connector
> suitable for double shielded cable with a larger O.D., and figured
> somehow we'd make that work for the other stuff.  It really doesn't.

Isn't that why there's little funky rubber/silicone grommet looking 
things in some installation kits. I always figured they're to make the 
cable "thicker" so it fits the connector.


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