View Single Post
  #1   Report Post  
Old October 29th 08, 01:52 AM posted to rec.radio.amateur.antenna
jawod jawod is offline
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 303
Default Carolina Windom without a balun: go figure

Well, as an update to my Carolina Windom project, I find that the CW OCF
dipole cut to typical dimensions works well WITHOUT a balun but does not
work at all WITH a balun.

Specifically, a DX Engineering BAL200-H10-AT 4:1 balun. I bought it to
go with a folded dipole from DX Engineering. It worked fine with the
folded dipole and a length 300 Ohm ladder line as feed.

When I use the above balun with the CW cut to typical dimensions and
using a 300 ohm ladderline feed, even RECEIVE is muted...no change from
coax only.

I am fairly sure that the balun is a voltage type and not a choke type.
I also installed a series of ferrite beads from Palomar to choke the
coax near the bottom of the ladderline.

I guess I'm not all that surprised that the CW works without a
balun...the ATU tunes it and sig reports aren't bad. I guess I have
some radiation from coax and a mismatch from coax to ladderline but I
think I can live with that. It's getting cold and I needed to finish
this thing before winter really sets in.

I am clueless as to why the CW failed to work AT ALL when USING a balun.
The internals of the balun look fine.

Any thoughts?

(here goes)

John
AB8O