LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #11   Report Post  
Old April 11th 06, 03:38 AM posted to rec.radio.amateur.antenna
Tom Donaly
 
Posts: n/a
Default Current across the antenna loading coil - from scratch

Cecil Moore wrote:
Michael Coslo wrote:

Not that I could fan the flames any more anyhow, but just what was the
original discussion about anyhow?



As I realized what the actual misconception really is, the discussion
shifted from coils to standing waves. Seems to me, W8JI and W7EL do
not understand the difference implied by these two different equations
(assuming |Ifor|=|Iref|).

Ifor = I1*cos(kx+wt) and Iref = I1*cos(kx-wt)

Istnd = I1*cos(kx+wt) + I1*cos(kx-wt) = I2*cos(kx)*cos(wt)

Gene Fuller has kindly explained the difference but W8JI and W7EL
seemed to have ignored his explanation. Gene says there is no
phase information in standing wave current phase and I agree.




I've said it before and I'll say it again, there is no phase variable
in I1*cos(kx+wt) and there is no phase variable in I1*cos(kx-wt) so
there can't possibly be any phase information in 2*I1*cos(kx)*cos(wt).
If you're going to measure a phase difference between two places on
a transmission line and you want to write an equation describing what
you're doing, you have to have the phase variable somewhere in your
equation so you can solve for it. Also, it would help, Cecil, if you
would be a little more careful when you copy these equations from your
favorite Bible. They keep changing form as time passes.
73,
Tom Donaly, KA6RUH

 
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
Imax ground plane question Vinnie S. CB 151 April 15th 05 05:21 AM
Questions -?- Considering a 'small' Shortwave Listener's (SWLs) Antenna RHF Shortwave 1 January 24th 05 09:37 PM
FS: sma-to-bnc custom fit rubber covered antenna adapter Stephen G. Gulyas Scanner 17 December 7th 04 06:42 PM
FS: sma-to-bnc custom fit rubber covered antenna adapter Stephen G. Gulyas Swap 17 December 7th 04 06:42 PM
Current in loading coil, EZNEC - helix Yuri Blanarovich Antenna 334 November 9th 04 05:45 PM


All times are GMT +1. The time now is 03:50 AM.

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