Hi John,
BuryFlex is my go to for loops (14 antennas on 4 towers). One of those
loops is 9913, had to buy it when BF was out of stock. I was concerned
enough about it last year that I did an examination and loss tested it,
but it was ok. The tough PE jacket on BF makes it stiffer than 9913.
One trick I found is to have a standoff arm on the tower at the center
of rotator travel. The standoff is about 10", assuming the other end
tapes to the boom out a bit further. This significantly reduces the
chance of rubbing on the tower.
I had to do this on my ring rotators since they have a lot of parts
outboard of the tower. The tower end 2ft long standoff is hinged and
follows the ring thru about 2/3 of a rotation. So there are two "loops"
one small one at the hinge and a large one from swing arm to ring. That
makes the total loop count 21.
Grant KZ1W
On 5/19/2020 05:18, john@kk9a.com wrote:
This is confusing because the subject does not match the contents of the
post. When people reply that this coax has worked well for them for
years I wonder which coax they are referring to - Bury-FLEX or LMR-400?
I purchased LMR-400 to make temporary antenna cables and I found it to
be quite stiff, at least compared to the Belden RG-213 that I have used
for years. So I sold it and bought LMR-400UF which is much more flexible
but unfortunately not good for long term outdoor exposure.
If cost is not a factor, what is the best rotator loop coax for HR?
What do the big stations like K3LR, K1LZ, W3LPL, etc use?
John KK9A
Pete Raymond N4KW wrote:
I plan to run LMR 400 up to the top of the tower, and the lowest loss
coax for the remaining antennas on the mast. It's advertised as being
flexible and capable of being used as a rotor loop. Have you used it
this way?
73, Pete, N4KW
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|