What am I missing here--I don't understand the difference between a "balun"
(at least a 1:1 balun) and a "choke." Possibly K9MI is referring to a 4:1
(or something else other than 1:1) balun?
Aren't they in fact the very same thing? If they each were in a "black
box," would they not both appear the same? All I can think of is that the
air-wound choke probably would have a narrower bandwidth of common-mode
Maybe this is just an issue of semantics.
I betcha W1JR knows! It appears that his coax-on-a-toroid is the best
(whatever that means) 1:1 balun.
Jim Wilcox, W3WV
----- Original Message -----
To: <email@example.com>; <firstname.lastname@example.org>
Sent: Monday, 02 June, 2003 10:54
Subject: Re: [TowerTalk] rf choke or balun?
In a message dated 6/2/03 2:22:38 AM Pacific Daylight Time, email@example.com
> Our local radio club is getting ready to replace
> the coax on the Pro 67 hf beam we have. I know
> some go with the choke at the feedpoint, and
> some think a balun in the way to go.
I think that Mosley calls for an rf choke. You need to follow their
EXACTLY with the 1.5" pigtail, etc. I think I tried a balun in the past and
of course it didn't work.
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
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