I use, or have used a lot of LMR 600. I much prefer the crimp on
connectors...HOWEVER LMR 600 UF is not recommended for exterior use. I
have used the UF versions of LMR 400 and 600. The best life I've gotten
out of them has been 6 years although it's rated at 10 years. The
jacket is rubber like, easily abraded, and does not stick to the
shield. A three turn coil of LMR 400UF laying on the flat plate top of
a 45G wore through to expose several sections of shield 3 or more inches
long. It does not appear to stand up well to UV light and that is at
43', 37" N. OTOH it is the most flexible large coax I've used
73
Roger (K8RI)
On 7/31/2015 8:43 PM, Robert Harmon wrote:
I have a 380 foot coax run to the top section of my motorized tower when it is
fully extended.
I am changing out all my old RG213 and thinking of saving a few db by going to
LMR600 up to the top section then
LMR400UF up from there for the rotor loop and up to the 40 meter beam and
triband/warc beam on the mast.
What do you think of LMR600 for this run from the shack up to the top section
for a motorized tower ?
When I lower the tower I am thinking I could coil the LMR600 into maybe 5 foot
diameter coils on the ground.
BTW the tower is 90 feet to the top of the top section when all the way up.
Is this a bad idea ? (I am hoping to avoid the cost of the flex LMR600UF if I
can.)
A side issue is I understand I have to be very careful not to nick the copper
clad on the center conductor
when installing a connector on the non flex LMR600. I would use the Davis
PL259 connectors for LMR600. Anyway maybe this usage of the
LMR600 is not a good idea, what do you think ?
Bob
K6UJ
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73
Roger (K8RI)
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