[Moon-Net] coaxial cable + antenna rotator

K9RX arsk9rx at gmail.com
Fri Apr 30 19:50:07 CEST 2021


It is possible that LMR600 will do the same thing – I’ve not seen any obvious damage to the outside (if it were bundling up on the braid I’d think you’d see a bulge from the outside)… also note I wanted to avoid stresses and yet still have decent low loss. This is being used on my 6M array so it is quite low loss – I made it 14’ long so that it hangs down from the array (which is also designed not to have any more than a 45degree angle on the coax as it leaves the T connection) hangs down and comes back up in a loop to the 1 5/8” HL which as mentioned is also pointing downward. 


[my thought was I’d use LMR1200 or 900 on the 23cm dish – assuming I go to that band]

Sent from Mail for Windows 10

From: pa4vhf
Sent: Friday, April 30, 2021 1:44 PM
To: K9RX; moon-net at mailman.pe1itr.com
Subject: Re: [Moon-Net] coaxial cable + antenna rotator

Thanks all for answering to my question regarding the use of low loss coaxial cables in combination with an antenna rotator.
Ecoflex 15 should be avoided! several people reporting cracks in the copperfoil causing problems
Hyperflex 13 and Superflex 13 (M&P) also suffer these problems, several people reporting this as well.
The standard 10mm coaxial cable seems better, not seen any direct report of foil problems.
SCF12-50 still seems to be the best solution, but it is recomended to use a double loop which is large enough.
Also LMR600-UF seems suitable, but I wonder if this cable is not suffering the same problems as Ecoflex 15/13mm cable as discribed above.
Maybe LMR600-UF has double breading?
Thanks again.
Dick, PA4VHF

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