LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #6   Report Post  
Old October 21st 04, 02:54 PM
Brian
 
Posts: n/a
Default


As you move along the wire the impedance changes. Moving the feedpoint
to some other location could result your 9:1 balun being less efficient
(mismatched). There are antennas which use a feedline connected to some
point along the wire instead of the end but you have to make the
connection at a specifc location, not just anywhere. The 'Windom' is one
of these types. The following website shows the design of a basic Windom
antenna. Note that the balun is 4:1 instead of your 9:1 for the end fed
wire. This is because the impedance at the connection point for a Windom
is lower than the end of a random wire or inverted-L.

http://www.packetradio.com/windom.htm


Thanks for the info. After doing research on the Windom antenna I gathered
it was going to be a little more involved than I expected, and I'm not sure
if it will be as effective for receiving. I'm leaning towards sticking with
the random wire and just getting more coax to reach the feed point instead
of bringing the lead-in closer.

-Brian


 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Feedline for RCVR antenna Ken Antenna 2 December 17th 04 07:37 PM
Off topic post regarding antenna feedline Steve Shortwave 5 September 9th 04 05:22 AM
450^ feedline for 1L 160 Loop greg z Antenna 3 December 20th 03 12:07 AM
feedline impedance mike Antenna 12 October 6th 03 01:06 AM
Layout for G5RV twin feedline? Harry George Antenna 1 August 11th 03 11:04 PM


All times are GMT +1. The time now is 11:33 PM.

Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright ©2004-2025 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017