Michael Ryan wrote:
> Alfredo, I bought a couple of rolls of the BURY FLEX here when I moved down
> to Florida in 1998. I ran this cable from the operating position, through
> the attic, and outside, into a cabinet with Poly Phasers, then up the tower.
> Most of the runs are 130' or so. With the HEAT, HUMMIDITY, 73% of the days
> are in bright SUN, SALT AIR ( right along TAMPA BAY), and summer RAIN and
> tropical storms, the BURY FLEX looks as good today as it did the day I ran
> it outside. The attics here in Florida likely average 120+ degrees on hot
> days by the way.
I'll bet it gets closer to 140 in those attics as we get well over 120
up here in the frozen North<:-))
> But with the heavy, thick jacket on this cable as well as
> the flexible stranded center conductor, no worries. I have some LMR-400
> around and also bought some expensive LMR-600 to use on 220 and 432 yagis. I
> was rather disappointed to say the LEAST at the tender outer jacket on that
> cable. At nearly $2 a foot I expected better. For HF to 2 meters I would
> not hesitate to use the Bury Flex at all.
There is LMR-600 and then there is LMR 600 Ultraflex. The UF has a very
fragile rubber like jacket that is only rated for 10-15 years while the
regular 600 is much tougher and UV resistant. I use LMR 600 for
everything except the pigtails or runs from the remote switches to the
sloping dipoles where I need the flexing, less weight, and bulk. There I
use BuryFlex. Actually I've used the LMR-240 and CNT-240 to the sloping
dipoles successfully. I like the 8X with braid plus foil for a shield
due to the flexibility and may replace the 240 between the remote
switches and 40 meter sloping dipoles where I'm pushing a KW through
short runs. (~30-40') although the 240 is rated for a slightly higher
break down voltage. At these frequencies and short runs loss is not a
problem, but breakdown voltage is. I can't use 8X or the 240s on 75
where the SWR near the band edges pushes the voltage too high.
I'd like to see a BuryFlex equivalent to the 8X where the cables take a
beating going out to those dipoles, but I need light weight and a low
cross section as it's in an area where the wind funnels through.
73
Roger (K8RI)
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