LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #10   Report Post  
Old January 12th 07, 04:36 PM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 1,614
Default Better for DX: Vertical or dipole?

Rick wrote:
Doesn't the horizontal part of the inverted L need to be as high as
possible for best results? I'd run into the same problems I'm running
into in putting a dipole or inverted V up high enough.


Not exactly. Make the vertical section of the Inv-L
as long as feasible. The vertical section is the
highest current section and therefore has the greatest
effect. Or instead of an Inv-L, make it a T antenna
with a vertical section and a symmetrical top hat.
The symmetrical top hat doesn't do much radiating.

Here's what EZNEC says using VERT1.ez as the reference.
40m 33' Vert1 has -0.04 dBi gain omnidirectional.

16.5'-16.5'Inv-L has 1.04 dBi gain with some directivity.

16.5'-23.5' T antenna has 0.19 dBi gain omnidirectional.
Note: 16.5' = vertical, 23.5' = horizontal top hat.

Performance wise, I don't think you could tell the real
vertical from the T except for the T's lower feedpoint
impedance.
--
73, Cecil, http://www.qsl.net/w5dxp


 
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
Why Tilt ? - The Terminated Tilted Folded Dipole (TTFD / T2FD) Antenna RHF Shortwave 2 April 18th 06 10:21 PM
I Want Another Antenna Lenny Shortwave 4 January 23rd 06 10:12 PM
Workman BS-1 Dipole Antenna = Easy Mod to make it a Mini-Windom Antenna ! RHF Shortwave 0 November 2nd 05 11:14 AM
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 08:56 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