[TenTec] Wet ladderline

[Bwana Bob]

I like LMR400. We ordered spools of it along with N connectors for the 
workplace when we rebuilt our GPS antenna distribution system. We have 
preamps built into the antennas and in the splitter, but the coax runs 
from the antennas are about 100 ft and at 1.5 GHz, LMR400 works very 
reliably.  The system we replaced used RG-213, which was marginal.  Some 
hams say that LMR400 is noisy, and they buy Belden 9913. I think that's 
an urban myth, and I hear that water can get into the 9913 because it is 
mostly air dielectric.  To each his own.

I have to laugh about the idea of burying  open wire or window line. The 
whole idea of using window or ladder line today is to reduce dielectric 
losses by making sure that most of the dielectric between the conductors 
is air, so that attenuation under a high SWR will be minimal.  Now 
replace the air with a  lossy dielectric like dirt and see what happens. 
In 1991 I found myself in a foreign land. The hotels were in a line on 
the beach and a couple of blocks in were several embassies. I amused 
myself by walking around spotting antennas. Except for one big log 
periodic, all of the embassy rooftops sported dipoles fed with good old 
600 ohm ladder line.

                 73,

                 Bob WB2VUF

On 8/13/2013 11:41 AM, Mike Bryce wrote:
> You're right, Jim,
>
> I ordered the LMR400 and had a bit of worry about how well the copper clad would hold up to the soldering iron.
>
> seemed to work okay, but that stuff sure is hard to work with.
>
>
> Mike Bryce, WB8VGE
>   the heathkit shop
> SunLight energy systems
> J e e p
> o|||||||o
>
>
>
>
>
>
> On Aug 13, 2013, at 3:19 AM, Jim Brown wrote:
>
>> LMR400UF (Ultraflex) has stranded copper center. :LMR400 has copper clad Al. Two different cables.
>>
>> 73, Jim K9YC
>>
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