Howdy, TowerTalkians --
I'm putting up a huge F12 6M beam and the B1 balun is AFU - the SO-239
on it pulled out. :-(
The non-technical support advice from F12 was to wind an RF choke. Umm,
okay. I'm not a huge fan of them on HF so Lord knows what happens when you
use one at 50 mHz.
Can anyone tells me what happens? Should I be using a current-type balun
ala' W2AU or should I wind the choke? If so, what size is it?
Part deux. In my meager understanding, a balun is a transformer that
goes from balanced-to-unbalanced (bal-un, get it?) vis-a-vis a feedpoint. It
also functions as an RF choke to prevent RF from spilling down the outside of
the shield. A coax wound RF choke doesn't really "transform" anything but does
choke the stray RF trying to come down the outside of the shield. Am I close?
Anyway, all comments appreciated.
Cheers,
Steve K7LXC
TOWER TECH
************************************** See what's free at http://www.aol.com.
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|