Thread: Cecil, was it you that mention a "windom balun?"
View Single Post
  #37   Report Post  
Old September 14th 10, 05:10 AM posted to rec.radio.amateur.antenna
Cecil Moore Cecil Moore is offline
external usenet poster
  
First recorded activity by RadioBanter: Aug 2006
Posts: 572
Default Cecil, was it you that mention a "windom balun?"
On Sep 13, 5:19 pm, Owen Duffy wrote:
The NEC model I posted
shows that a 1k isolator (common mode choke) is not effective for that
purpose.

Here's a model of a Carolina Windom on 20m with a 2k choke (isolator)
20 feet down the coax from the antenna feedpoint at a height of 50
feet. The maximum current on the coax braid above the isolator is 0.72
amps. The maximum current on the coax braid below the isolator is 0.14
amps. The radiation pattern is close to the advertised one for 20m.

http://www.w5dxp.com/carwin20.JPG
--
73, Cecil, w5dxp.com

Reply With QuoteReply With Quote