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Re: Topband: 50 ohm direct burial coax cable

To: Bill Wichers <billw@waveform.net>
Subject: Re: Topband: 50 ohm direct burial coax cable
From: mstangelo@comcast.net
Date: Tue, 3 Jun 2014 15:21:28 +0000 (UTC)
List-post: <topband@contesting.com">mailto:topband@contesting.com>
Bill,

Thanks. I will check it out.

Mike N2MS
----- Original Message -----
From: Bill Wichers <billw@waveform.net>
To: mstangelo@comcast.net, topband@contesting.com
Sent: Tue, 03 Jun 2014 14:58:51 -0000 (UTC)
Subject: RE: 50 ohm direct burial coax cable

Usually "direct burial" cable is just a PE jacket with a flooding compound in 
the braid. 

Times Microwave makes a direct burial variant of their LMR-400 called 
"LMR-400-DB". It adds a flooding compound in the braid. The flooding compound 
will seal small fractures in the jacket.

BTW, for everyone, there is a new "dry" type of water blocking compound used in 
fiber optic cables that is usually in the form of a powder or a yarn. When it 
gets wet it expands and seals the damaged cable area. It's lots easier to work 
with than the more traditional gel-type flooding compounds. Maybe if we're 
lucky we'll see someone start making coax that way!

  -Bill

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