Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old October 31st 06, 01:47 AM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Oct 2006
Posts: 46
Default 160 meter antenna pros and cons

Just a (long wire) connected to the center of the coax, cut to resonate at
160 meters (about 130' if my memory is correct) in other words, one side of
a normal dipole.
Joe

...
... to a long wire cut for mid band
on 160.


What does that mean?

Owen
--



  #2   Report Post  
Old October 31st 06, 02:08 AM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jun 2006
Posts: 1,374
Default 160 meter antenna pros and cons

If you do that, the outside of the coax becomes the other half of the
dipole. Be prepared for some interesting effects in the shack.

Roy Lewallen, W7EL

Merlin-7 KI4ILB wrote:
Just a (long wire) connected to the center of the coax, cut to resonate at
160 meters (about 130' if my memory is correct) in other words, one side of
a normal dipole.
Joe
...
... to a long wire cut for mid band
on 160.

What does that mean?

Owen
--



  #3   Report Post  
Old October 31st 06, 02:34 AM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 168
Default 160 meter antenna pros and cons

On Mon, 30 Oct 2006 18:08:57 -0800, Roy Lewallen
wrote:

If you do that, the outside of the coax becomes the other half of the
dipole. Be prepared for some interesting effects in the shack.


Joe,

Getting detail from you is like drawing teeth. I suppose part of the
learning process is learning the factors that are relevant to the
situation.

You did say you would connect the outer of the coax to the tower....
where abouts? Near ground, somewhere else? This makes a difference.

Fundamentally, you are probably on the wrong track connecting a half
wave wire to the centre of the coax... but that depends on what you
connect to the other side of the end of the coax.

If in fact you effectively ground the end of the coax at the outer,
and have the centre connected to the end of your half wave wire, you
will have a very high VSWR on the coax, exacerbating the loss it
already has, and the magnitude of that loss depends on things that you
haven't described... but it can be huge.

If you were to chose the worst length of a wire to connect to a
substantial length of coax inner in that scenario, it is probably a
half wave. What were / are you trying to achieve?

Owen
--
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
Feeding a wire loop antenna Antonio Vernucci Antenna 3 September 5th 05 10:14 PM
superconducting antenna? Richard Clark Antenna 30 January 14th 05 03:18 AM
Hardline useage, pro's and cons aunwin Antenna 4 June 20th 04 06:22 PM
Pros and cons of Broadband Power Lines (BPLs) Occasional AB Listener Shortwave 16 March 25th 04 07:49 PM
kaito KA1102 pros and cons Altawaowr Shortwave 3 December 14th 03 03:35 AM


All times are GMT +1. The time now is 12:16 PM.

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