LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #11   Report Post  
Old December 29th 08, 01:49 PM posted to rec.radio.shortwave
external usenet poster
 
First recorded activity by RadioBanter: Nov 2007
Posts: 568
Default Shortwave Radio Listener (SWL) Antennas -versus- Amateur Radio Antennas

In message , Dave
writes
Telamon wrote:
In article ,
Dave wrote:

John Smith wrote:

However, in side-by-side comparisons on 10-6-2m antennas I have
built, comparing a 5/8 against the 1/2 (construction
methods/materials and matching components identical) ... the actual
difference, in the real world, must be less than the width of a
meter needle in the readings ... or, put simply, I no longer deal
with the extra length required of the 5/8 ... your mileage may vary ...

The advantage of a physical height (antenna length) between 180 and
215 degrees (see previous post regarding the magic number being
around 195 degrees) is improved take-off angle and reduced
skywave-groundwave interaction, not dramatic nearfield voltage increases.

Regarding Mr. Smith's comments above my experience and others is the
opposite. 5/8 is a much better performing antenna than a 1/2 wave for
local VHF and UHF communications. Well worth the effort to build a 5/8
wave antenna over a 1/2 wave. The 5/8 had some kind of series load
coil part way up the whip where the 1/2 wave match/compensation was
done at the base so the whip was solid. Sorry I can't more specific
then that as those experiments were many years ago.
Mr. Smith is still lost in space.


5/8 wavelength antennas do not require a ground plane, do they?


Oh yes they do.
--
Ian
 
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
Antenna for shortwave reception PJ[_4_] Antenna 113 January 1st 09 06:24 PM
Should a shortwave loop antenna, hung outside, also improve FM reception? dead of night Shortwave 0 January 23rd 07 12:05 AM
The "Green" Antenna for AM/MW Radio Reception plus Shortwave Too ! RHF Shortwave 0 January 10th 07 01:21 PM
Sangean ATS-505 Receiver - Improving your Shortwave Radio Reception with an External Shortwave Listener's (SWL) Antenna RHF Shortwave 0 January 16th 06 09:12 PM
shortwave reception.. with Grundig YB 400 PE David Mills Shortwave 4 May 18th 04 06:58 AM


All times are GMT +1. The time now is 08:20 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