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Re: [TowerTalk] Right Angle Connectors

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Right Angle Connectors
From: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
Date: Sat, 7 May 2016 00:35:37 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
My new Amphenol connectors use Teflon insulators which is white with a waxy like feel. Teflon handles moderate temperature and voltage well, BUT, don't apply a really hot soldering to it as the byproducts produced are poisonous. Clear could be plexiglass, Lexan, or ? Both are good insulators, but plexiglass does not stand up well to heat. I just went to the shop: The surplus 90s are clearly marked Amphenol in "raised" letters. Some have clear plastic and some have a gray insulator. Please note, these are old, and that is probably well over 40 years old.

Teflon has at least three down sides. They are its response to very high heat, it tends to "cold flow" which is not usually a problem, in ham installations, and it's expensive!. It is much more resistant to center conductor migration than foam dielectric. HOWEVER Teflon makes a very poor mechanically loaded insulator.

My new Amphenol connectors, UHF, N-Type, and bulkhead connectors all have White Teflon insulators.

"I think" you will find "really old" Amphenol PL259s have phenolic insulators as they were made before Teflon was invented. I actually had some of those when I was a Novice 55 years ago. I believe Gary was correct,when he said the good ones have the male center screws into the other pin.

Now days I usually use crimp connectors. They are quick, easy, and mechanically stronger than the solder type PL259s.

73

Roger  (K8RI)


On 5/6/2016 Friday 9:36 PM, Don W7WLL wrote:
Got a lot of feedback re the subject connectors and overwhelming the suggestion 
was to use Amphenol parts, which I usually do (but I have a lot of inherited 
connectors).

I had never paid a lot of attention to connectors for my 8, 213 and similar 
coax’s, but I did note that the color of the insulator varied.  After reading 
specs that the Amphenol used PTFE (all of my Amphenol of a later vintage appear to be 
clear insulation), I took a look a some of the right angles I had plus a pile of my 
barrels. Of those NOT marked Amphenol, almost all had no readable brand or number 
imprinted.  I also noticed that the insulation was either white or shades of grey.

I’m not knowledgeable on plastics and am now curious to know what the white or grey material used in 
these ‘other brand’ connectors might be (I’m dangerous enough to know a lot of 
plastics do come in several colors).

Don T
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73

Roger (K8RI)


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