LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #8   Report Post  
Old October 19th 04, 05:37 AM
Richard Harrison
 
Posts: n/a
Default

Tom Donaly, KA6RUH wrote:
"---forget what Richard just posted."

Suits me. You recall the old story about leading a horse to water.

Tom rejects measurements of r-f currents at both ends of a loading coil
at work. The currents were clearly differing.

Tom must be stuck with battereis and the rise and fall these produce in
the current of an inductor.

A loading coil is usually in the antenna field in our examples. The
loading coil is subject to an incident wave and to a reflected wave.
These waves combine in a continuously varying phase relation along the
coil to make current, impedance, and voltage all functions of their
positions along the coil. Every spot along the coil is different when
both waves are sensed together. That`s the way SWR works, and we`re
discussing standing-wave antennas.

I have a 1982 ARRL Antenna Book. On page 13-3 there is a Fig. 6,
"Improved Current Distribution Resulting From Center Loading". The
loading coil clearly shows less current at its top than at its bottom.

Best regards, Richard Harrison, KB5WZI

 
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
Lumped Load Models v. Distributed Coils Wes Stewart Antenna 480 February 22nd 04 02:12 AM
Current in antenna loading coils controversy Yuri Blanarovich Antenna 454 December 12th 03 03:39 PM
Eznec modeling loading coils? Roy Lewallen Antenna 11 August 18th 03 02:40 AM


All times are GMT +1. The time now is 06:17 PM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017