--- In [email protected], "David" <[EMAIL PROTECTED]> wrote:
>
> Okay sorry about the spelling errors but the coax I have came from
a guy who
> moved to Florida a year or so ago via another ham who's call is
k4rjj the
> numbers on the heliax are as follows he believed that the guy used
this hard
> line on a antenna system or repeater in Marietta, ga
>
> "84147 LDF5 50 ohm HELIAX COAXIL CABLE 52401 A04P"
>
> I have three sections of this cable. one looks like it has a
ground kit on
> it all sections appear to have connectors at both ends that have
rubber
> protectors on it protect if from weather.
>
> Now I need to test this before I install it
> The tools I have on hand are
> Mfj 269
> Diamond watt meter swr bridge
> 50 ohm dummy load and various radios
> Can I do a decent test with the above? If so how?
Well, what you can do with what you have:
Check the electrical length with the MFJ (it's in the manual)
Connect your transmitter to one end, dummy load to the other, and
using the watt meter, check for any noticable loss, looking at the
difference between power into the cable, and power out at the other
end.
You didn't say the length, but with LDF-5, you can look up the specs
for loss vs length and see if what you get is about right.
> Eventually I want to put a beam on the mast and
> a rotor. I figure I am going to have to use a jumper from the hard
line to
> the antenna to get around the rotor I figure this will be about
10' long.
> What type of coax to use for this jumper? Is there a better way?
A short length of flexible coax, with stranded copper center
conductor. The plated aluminum center conductors won't hold up to
the flexing.
But... A beam on a repeater?
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