David,
Have you run the coax loss numbers on the intended frequencies? You may
find that going to hard line from the base of the tower is not worth it.
Try http://www.arrg.us/pages/Loss-Calc.htm I just used it to determine
that RG-213 is plenty of coax to go up a rotating tower for a new 80m
dipole and a 30m yagi. While there is a difference between 7/8 hard
line and rg-213 at those frequencies, the difference in loss is not
worth worrying about.
Rich - N5ZC
On 7/10/2017 11:15 AM, David Aslin G3WGN wrote:
I'm putting together a new contest station and have already decided on/obtained
LDF5-50A for the 150ft runs to the bases of the two crank-up towers.
Looking for real-life experiences with cable choices for going up the telescopic
crank-up towers. Seems to me LDF Heliax (either 4-50 or 5-50) won't have
sufficient flexibility for the job - the towers are likely to be up/down frequently
for neighbour and passing storm reasons. Am I too cautious on that score or is a
low-loss coax with stranded core like the Messi & Paolini Hyperflex/Ultraflex
series or LMR 400/600UF a better bet?
73, David G3WGN M6O
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