Hi Roger,
Thanks for your answer.
I've not studied their topology in details.
What I've seen is that the drops were in RG-6 (going for up to 200m in some
cases) and the bus (not sure about the main trunk) is using this 1/2 inch
chinese cable.
In opposite to the specs I read on the chinese website, center conductor is Cu
coated Al.
As you noted, it breaks very very easily.
It can still be good for my usage, but I will have to take great care handling
the cable even connecting/disconnecting the PL can break the center conductor
as the cable is not flexible.
Yesterday I soldered a PL on it and tried to do some measurements and that's
what happened!
73,
Yan.
---
Yannick DEVOS - XV4Y
http://xv4y.radioclub.asia/
http://varc.radioclub.asia/
> Le 17 janv. 2015 à 00:00, towertalk-request@contesting.com a écrit :
>
> Message: 2
> Date: Fri, 16 Jan 2015 10:29:34 -0500
> From: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] How to solder aluminum braid coax cable ?
> Message-ID: <54B92E5E.7000502@tm.net>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> They had RG-6 size cable between poles? Around here it is 3/4" between
> poles. The drops are RG-6 size with foil plus braid shield. Like most
> RG-6 size they use copper plated steel for the center conductor. When
> running trunks they use huge 1000' spools of 3/4". A few were dropped,
> denting the outer layer. (they threw them away) I had a 1000' spool,
> minus maybe 100 feet. It is a solid Al shield, no PVC jacket. The
> center conductor is larger than 1/8th inch (Never measured it ), Copper
> plated Aluminum. Virtually all companies in Mid Michigan areas us 3/4",
> bare Al for trunks. It's far more rugged than the half inch which
> kinks easily.
>
> For many years I used the 3/4 inch for long runs. Tower and antennas
> were over 300 feet from the house. Out of the original spool, I used a
> lot, gave away a lot, and still have a few hundred feet left.
>
> The less than 100% shield has little to do with power and a lot to do
> with signal leakage both in and out. I think most RG-6 size is "rated
> the legal limit up through 10 MHz with a 1:1 SWR. I don't think I'd
> trust it at that power level for long. OTOH, I've run the legal limit
> through 8X up through 40 meters and a "reasonable SWR < 1.3:1 with no
> problems, I tried CNT250, which is good coax, but it is nor nearly as
> flexible with the solid center conductor compared to the multi-strand
> Copper center conductor of 8X. The center conductor kept breaking in
> the wind on the feed lines to the center fed, half wave, 40 M sloping
> dipoles. I've had no failures using 8X with a foil plus braid shield.
> It's very flexible and sturdy
>
> 73
>
> Roger (K8RI)
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