Re: Topband: Best coax for direct burial?

["ZR" <zr@jeremy.mv.com>]

Jim

You cant get any more reliable than 1/2" Andrew or similar hardline. In this 
area its free or very cheap and often with connectors as 2 way shops close 
down and customers keep migrating to cell phones.
Paging companies are also folding up.

Im sure you wont find a 700' run but 100-200' are rather common; use barrel 
connectors to join together and use RG-213 for jumpers at the ends. Even 
7/8" cable is rather available.
Carl
KM1H



----- Original Message ----- 
From: "Jim Garland" <4cx250b@miamioh.edu>
To: <Topband@contesting.com>
Sent: Sunday, August 25, 2013 11:25 AM
Subject: Topband: Best coax for direct burial?


> My forthcoming 160m vertical requires about a 700 ft run of coax. I'd like
> to bury the coax over most of the run, but some of it will be elevated, 
> with
> high UV exposure. (I'm at 7000 ft elevation and sun shines 330 days/yr.) 
> The
> climate is very arid here (about 4-6 in rain/yr), so water ingress isn't a
> major consideration.
>
>
>
> I'd like an RG-213 type coax with a solid dielectric, rather than an 
> LMR-400
> type, or anything with a foam dielectric. The losses aren't an issue, 
> since
> this will be used exclusively on topband and 80m. I'm unclear about what
> "direct burial" coax means, especially with respect to the outer jacket. 
> Is
> polyethelene to be preferred over PVC with respect to toughness and UV
> resistance?  Stranded center conductor is mildly preferred but not
> essential. Mostly what I'm looking for is long-term reliability. I'd
> appreciate advice and suggestions, and also any recommendations about
> suppliers (some of whom give very little technical info about their 
> products
> and are rather cryptic about who actually makes the coax.)
>
> Tnx and 73,
>
> Jim W8ZR
>
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