[SixClub] Recommended Coax?

[Les Rayburn]

Chris,

I hear this advice often, and don't doubt that it's accurate with one 
exception. CATV hardline isn't easy to come by, at least here in Birmingham, 
AL. When cable TV "head end" construction was booming in the 80's and 90's, 
it seems that hardline "short ends" were available as scrap around the 
country, but very few cable head ends are currently being built.

I've spoken to technical managers at both the local CATV companies, and they 
have very limited supplies of CATV hardline on hand now, mostly for repair 
work. No scrap material seems to be available.

I'd love to pick up about 100' feet of the stuff, so if anyone knows of a 
source, please share with all of us.

I'm currently using Andrews 1/4" hardline (50 ohm) for my 6 Meter antenna, 
and do feel that it makes a difference, especially with weak signals. 
Previously, I had used Belden 9913; and was also quite pleased with that.

73,

Les Rayburn, N1LF
EM63nf




--------------------------------------------------
From: <cboone at earthlink.net>
Sent: Thursday, June 17, 2010 2:20 PM
To: <doc at kd4e.com>; "World Wide Six Meter Club" <sixclub at mailman.qth.net>
Subject: Re: [SixClub] Recommended Coax?

> IF you can get some 3/4 in CATV hardline, use that...the loss is better 
> than 7/8in Heliax at UHF (Even with the SWR loss added in)...You can use 
> 3/4 to 1/2in brass compression unions to mate PL259s to the hardline. In 
> flexible areas, you need something like RG8, etc...but for long runs that 
> are tied down, 3/4in CATV line is great and dirt cheap!
>
> Chris
> WB5ITT
>
>
> -----Original Message-----
>>From: kd4e <doc at kd4e.com>
>>Sent: Jun 16, 2010 7:08 PM
>>To: World Wide Six Meter Club <sixclub at mailman.qth.net>
>>Subject: Re: [SixClub] Recommended Coax?
>>
>>So if 9913 and LMR-400 are discouraged - due to maintenance
>>concerns - then it is either Davis RF Bury-Flex or some form
>>of hardline on 6m and 2/440?
>>
>>HF is much more tolerant of line-losses so I will use my
>>older RG-8U and RG-8x coax there.
>>
>>Still have not decided how I will get the 450 Ohm slotted
>>line for my HF dipole into the steel house ... hmmm.
>>
>>> Basically you can not prevent the coax, any coax, from
>>> breathing unless it is solid such as direct bury cables,
>>> or pressurized air core. The last coax I had contaminated
>>> was LMR-400 and that was due to water getting into the
>>> power dividers.  Even though we consider N-type
>>> connectors water proof, the water went *through* both the
>>> female connector on the divider and the male connector on
>>> the coax.  The connectors were thoroughly sealed on the
>>> outside. 73, Roger (K8RI)
>>
>>-- 
>>
>>.Thanks! & 73, doc, KD4E
>>.Have an http://ultrafidian.com day!
>>.
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