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Re: [TowerTalk] Topband: Rather use N-type (was Re: The answer to PL-259

To: towertalk <towertalk@contesting.com>
Subject: Re: [TowerTalk] Topband: Rather use N-type (was Re: The answer to PL-259
From: Steve Maki <lists@oakcom.org>
Date: Fri, 7 Dec 2018 18:25:07 -0500
List-post: <mailto:towertalk@contesting.com>
Well here's the advantage of captivated center pins: the pin is NOT bonded to the center conductor. IOW, if the coax center conductor shrinks a bit, it can slide in the center pin and the pin stays put.

And that's exactly what you want it to do - especially with an N connector.

-Steve K8LX

On 12/07/18 14:25 PM, Mike Waters wrote:

Exactly my experience, even with captivated pins!! And my coax runs
were only about 100' long.

The captivating washers were made of Teflon®, *and Teflon cold
flows*. This was when I lived in Toledo, Ohio when the temperature
dropped well below zero.

Four photos of those N connectors are at http://www.w0btu.com/files/misc/N_plugs . See the last two.

73, Mike www.w0btu.com

On Fri, Dec 7, 2018, 1:02 PM Richard (Rick) Karlquist
<richard@karlquist.com> wrote:

My two 500 foot RG-216 military surplus cables both eventually
exhibited retracted pins on the type N connectors at both ends.  I
replaced them with PL-259's.  ...  Success anecdotes about install
once and never touch again commercial sites are probably not
relevant to ham applications.

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