[amsat-bb] LMR-400 direct to antenna or no?

Andrew Glasbrenner glasbrenner at mindspring.com
Fri Apr 1 02:48:25 UTC 2016

There is an "ultraflex" version of LMR-400, with the UF suffix. It has a stranded center conductor and wont break as quickly as -400 when flexed repeatedly. I use jumpers made of this between the antenna and mast mounted preamps, around the rotors.

73, Drew KO4MA

Sent from my iPhone

> On Mar 31, 2016, at 9:35 PM, Scott <scott23192 at gmail.com> wrote:
> I hope to put up my first rotating antenna soon and just received a nice length of LMR-400 to use. (regular, not "super-flex")
> Having never seen LMR-400 before, I did not know how flexible it would be.  I would call it "medium"... not stiff as a pipe but not floppy, either.
> My question is whether anyone using LMR-400 can recommend whether I should attach it directly to my antenna (with slack loops, of course)?
> Or, should I get a few meters of something more flexible to attach to an antenna that needs to be free to rotate 360 degrees?
> If a jumper is recommended, I would appreciate suggestions on what cable would work best for the task.  The frequency for this project is 70cm.
> Thanks!
> -Scott, K4KDR
> Montpelier, VA  USA
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