Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old December 13th 05, 11:45 AM posted to rec.radio.shortwave
 
Posts: n/a
Default To RHF, et al. Re Loops

A 1 wavelength loop has a pattern nearly identical to a half wave
dipole-
i.e. figure 8, slightly less gain than the dipole, and narrower
bandwidth.

At other lengths, the loop, like a center fed wire, will devleop
multiple
nulls. Of course, like the dipole at low heights, the nulls tend to
fill in.

IMHO, I fail to understand the fascination with the loop configuration.
If
it is a "quieter" antenna than a dipole ( and I can see no reason for
this
other than the idea that it is a DC short) then a dipole could be made
equally quiet by placing a suitable choke across the center insulator.

Take off angle is identical to a dipole at the same height.
Dale W4OP
.................................................. ...............................

I fully agree...Note the post I just made, before I read this one..
And a loop is most certainly *not* a quieter antenna than a dipole,
*except* in cases of corona problems. If there is no corona, or
static buildup, there is no advantage at all. And you would need to be

in the mountains like HCJB to really see the advantage. It was the
corona
problems at HCJB which led to the use of the loops at that station.
Had nothing to do with the antenna performance in itself.
Like I've said, RHF is an enthuthiastic sort, but he comes up
with some hokey ideas about antenna theory at times.
RHF, you need to invest in some good antenna books. IE: ARRL antenna
handbook, etc.. Your "intuition" is leading you astray...
MK

Reply
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
To RHF, et al. Re Loops Telamon Shortwave 1 December 14th 05 05:18 PM
To RHF, et al. Re Loops [email protected] Shortwave 7 December 14th 05 05:17 AM
To RHF, et al. Re Loops Dale Parfitt Shortwave 0 December 13th 05 05:03 AM
Full wave loops - alternate design? bpnjensen Shortwave 6 October 22nd 04 03:11 AM
Advice Needed for Super J-Pole Design: Inductive Loops Overheating Dr. Slick Antenna 12 January 26th 04 04:41 PM


All times are GMT +1. The time now is 11:20 AM.

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