[SixClub] Recommended Coax?
KB0NLY
kb0nly at mchsi.com
Thu Jun 17 18:15:27 EDT 2010
Same around here, I haven't seen a scrap of CATV hardline in about 10
years...
Back when they replaced a lot of stuff you could find a spool with 10ft or
20ft on it, that was about it. The companies tightened up on the scrap due
to cost, I was told anything over 20ft is rolled up and kept for patch and
repair work. When they replaced a section in the alley behind me due to
squirrel damage where it passed through the branches of a tree they had a
roll on the truck that looked like it had been sitting around since it was
last used for a previous job, the cable was new and sealed up on the ends
with a rubber cap and tape, but the spool looked like it had been around for
10 years or better. When I inquired about scraps of hardline he said those
get put in the back lot for repair needs.
And the short stuff they don't keep? He told me they sell it per pound to a
recycler.
73,
Scott
--------------------------------------------------
From: "Les Rayburn" <les at highnoonfilm.com>
Sent: Thursday, June 17, 2010 2:33 PM
To: <cboone at earthlink.net>; "World Wide Six Meter Club"
<sixclub at mailman.qth.net>
Subject: Re: [SixClub] Recommended Coax?
>
> 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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>>>.=================== http://kd4e.com
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>>>.Google Street View logs WiFi networks & Mac addresses
>>>.Use http://Startpage.com instead - they respect privacy
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