Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old November 14th 06, 07:24 PM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Nov 2006
Posts: 1
Default Johnson Match Box

Do you think that putting a 1:2 or 1:4 UNUN at the feedpoint of the KW
matchbox will extend the matching capability of this feedline tuner?
No feedline length changes are possible at this time!!!!!!!!!!!!
  #2   Report Post  
Old November 15th 06, 12:06 PM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 326
Default Johnson Match Box

All the transformer will do is change the impedence... What it will not
do is correct reactance... So,if the matchbox is simply beyond its
impedence range the unun 'might' help... But if there is uncompensated
reactance which is almost guaranteed it will not help with that..

denny / k8do



Willy wrote:
Do you think that putting a 1:2 or 1:4 UNUN at the feedpoint of the KW
matchbox will extend the matching capability of this feedline tuner?
No feedline length changes are possible at this time!!!!!!!!!!!!


  #3   Report Post  
Old November 16th 06, 11:06 AM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Nov 2006
Posts: 2
Default Johnson Match Box

This works FB for me:

Connect another length of whatever feeder in parallel at the oupt terminals.
Experiment with length, short/open-end, reactance (parallel/series coil/cap)
any where along the new line - - right there in the shack.

73, Dave, N3HE

"Willy" wrote in message
.. .
Do you think that putting a 1:2 or 1:4 UNUN at the feedpoint of the KW
matchbox will extend the matching capability of this feedline tuner?
No feedline length changes are possible at this time!!!!!!!!!!!!



Reply
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
Johnson Viking Match Box 275 Watt AM Tuner Doc Swap 0 July 21st 06 12:14 PM
FS- 2way Service/Maint/Operator Manuals !!!! David M Schertzer Boatanchors 0 September 21st 03 03:11 PM
FS- 2way Service/Maint/Operator Manuals !!!! David M Schertzer Boatanchors 0 September 12th 03 05:07 PM
FS- 2way Service/Maint/Operator Manuals !!!! David M Schertzer Swap 0 September 12th 03 05:07 PM
FS- "TON of Service/Maint/Operator Manuals !!!! David M Schertzer Swap 0 September 5th 03 02:13 PM


All times are GMT +1. The time now is 02:52 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