Topband: Chokes for Beverages

[ZR]

Another reason to be leery of crimp connectors. My soldered connector stubs 
are still fine after 25 years at 2 locations in very high humidity 
enviroments.

Carl
KM1H


----- Original Message ----- 
From: "Jim Brown" <jim at audiosystemsgroup.com>
Cc: "TopBand" <topband at contesting.com>
Sent: Thursday, June 21, 2012 12:15 PM
Subject: Re: Topband: Chokes for Beverages


> On 6/21/2012 8:47 AM, Guy Olinger K2AV wrote:
>
>> I have recently replaced some "RG-6" in use for maybe seven or eight
>> years. I opened it up to see what was happening.   The degree of
>> oxidation on the inside and outside of the foil was perplexing.  One
>> could easily draw a thumbnail along either side and build up a little
>> pile of oxide.  The foil itself had become very brittle.  It had been
>> "sealed" and treated outside.
>
> In the most recent version of his excellent book on Interstation
> Interference, George, W2VJN, noted that he had observed deterioration of
> stubs made with LMR400 that had been stored in his garage for a period I
> seem to recall was on the order of 8 years. Although a properly
> installed connector (and no doubt that George did that) should make
> excellent contact with the braid, which is tinned copper, differential
> current will be on the inner surface of the shield, which is foil.
>
> 73, Jim K9YC
>
>
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