[TowerTalk] 2M balun

[K7GCO@aol.com]

In a message dated 11/21/00 4:58:36 PM Pacific Standard Time, 
n2tk@earthlink.net writes:

<< I have a Hygain 205B-S 2m beam. It uses a piece of coax across the feed
 point as a balun. The coax is shot. Does anyone know what Hygain uses for
 coax for this - 50 ohm, polyethylene dielectric? Can I just put a ferrite
 core balun in place of it? What kind?
 Tnx
 Tony
  >>
I haven't seen this 2M beam but if the coax is .66 VP and is a little over 2' 
long, it's a 1/2 wave and part of a 4:1 step up 200 ohm balun.  You can feed 
the beam with another type balun but is has to be a balun designed to match 
200 ohms.  I'd replace the coax with 27" if .66 VP coax.  You can coil it up. 
 Connect all the shields together and connect the center lead of the main 
feedline to the center lead of one end of the 1/2 wave of coax and to one 
feedpoint.  Connect the other center lead to the other feedpoint.  Copy what 
you have. k7gco

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