LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #5   Report Post  
Old April 15th 04, 05:21 PM
Richard Clark
 
Posts: n/a
Default

On Thu, 15 Apr 2004 11:34:21 -0400, "JLB"
wrote:
If I remember my traveling wave antenna theory, he wouldn't necessarily be
loosing 3 dB in the resistors. At higher frequencies more of the power
radiates before it gets to the loads, does it not?

Jim
N8EE


Hi Jim,

You are right (losing - unless it has diarrhea). What is described is
a vertical, half Rhombic, a Military application for many years. This
report appears to be about a design from yet another "inventor" who
has "discovered" something that confounds the experts.

The original poster asked for comments, especially about the resistor
(the difference between shorting it and loading it) however, nothing
is said about ground. Both of the resistors will require radials,
however, there seem to be more specifics missing than that.

In other words, what is the leg angle subtended at the fed point? Why
not simply feed one end and terminate the other? Seems like a pain to
elevate the feed point without some analysis showing why - but then it
appears the column was painfully shy of anything technical beyond
carpenter scaling.

73's
Richard Clark, KB7QHC


 
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
Inverted ground plane antenna: compared with normal GP and low dipole. Serge Stroobandt, ON4BAA Antenna 8 February 24th 11 10:22 PM
Mobile Ant L match ? Henry Kolesnik Antenna 14 January 20th 04 04:08 AM
Poor quality low + High TV channels? How much dB in Preamp? lbbs Antenna 16 December 13th 03 03:01 PM
QST Article: An Easy to Build, Dual-Band Collinear Antenna Serge Stroobandt, ON4BAA Antenna 12 October 16th 03 07:44 PM


All times are GMT +1. The time now is 06:23 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