You might want to check out Davis Bury-flex.
I have used in in conduit - under water, for several years with no problems.
Bruce W8RA
________________________________
From: "mstangelo@comcast.net" <mstangelo@comcast.net>
To: Bill Wichers <billw@waveform.net>
Cc: topband@contesting.com
Sent: Tuesday, June 3, 2014 11:18 AM
Subject: Re: Topband: 50 ohm direct burial coax cable
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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