I'm using LMR400UF and was informed by Steve Davis of Davis RF that it is
not suitable for direct burial.
They sell a cable called "BURY FLEX" that is very close to the LMR400UF and
a good price.
Larry WA2SRY
Durham, NC
----- Original Message -----
From: "Jon Ogden" <na9d@speakeasy.net>
To: "Bill Ogden" <ogden@us.ibm.com>; <towertalk@contesting.com>
Sent: Wednesday, October 16, 2002 3:06 PM
Subject: Re: [Towertalk] Coax recommendations
> on 10/16/02 8:45 AM, Bill Ogden at ogden@us.ibm.com wrote:
>
> > Thank you for the practical comments about coax choice. Is LMR400
handled
> > just like RG8 or RG213? Same connectors? Would it be a transparent
> > change? How sensitive is it to sealing the ends? Burial? RG213 seems
> > very forgiving about handling and environment.
>
> LMR400 falls in to the RG8 size classification and so uses the same
> connectors. No problem. No issue with sealing. It's a solid dielectric
> unlike 9913. It is suitable for direct burial. No problem there. The
only
> issue that has been raised is that of kinking the dielectric. One guy on
> the reflector is very worried about that and any kind of deformation.
I've
> used a lot of it and never had problems. As long as you don't go beyond
the
> bend radius of the cable and treat it carefully, it will work fine.
>
> LMR400 also handles a lot more power than RG-8 and has a lot less loss
than
> RG-213.
>
> It comes in 2 flavors - ultra flex and regular. The ultraflex has a
> stranded center conductor and is very flexible (also check out Cable
Experts
> CXP1318FX as a low cost alternative). The regular has a solid center
> conductor and is not as flexible. It does have better loss
characteristics.
> And it's flexible enough to use with a rotor. Oddly enough, I have the
> solid stuff on the rotor and tower and the flexible stuff running through
> the house to the shack!
>
> 73,
>
> Jon
> NA9D
>
> -------------------------------------
> Jon Ogden
> NA9D (ex: KE9NA)
>
> Life Member: ARRL, NRA
> Member: AMSAT, DXCC
>
> http://www.qsl.net/ke9na
>
> "A life lived in fear is a life half lived."
>
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