LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #11   Report Post  
Old August 3rd 09, 09:14 PM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Apr 2008
Posts: 543
Default Counterpoise for an end-fed wire antenna

You are correct. I should NOT have given a simplified response to a
simple question.
Your technical answer is a much better response tho I suppose I could
have made mine as technical so that he would not ask questions any
more! Good point about common mode. That should screw him up as well
as other things that you inserted with respect to how does one connect
to an antenna. We could ask him I suppose how many wires he intends to
connect to his intended antenna feed point, and if it is not two then
question how he intends to measure the impedance for matching
purposes. Yup, I could have done a better job.


Art,

See the original post asking: "How to route feedline from dipole".
If he were to let his coax hang straight down from the feed point, there
would be no discussion. In asking about dressing the coax along one of the
dipole legs, Common Mode currents are induced on the outside of the shield
and there is no longer a simple discussion. His further questions arise
out of trying to deal with that problem of not being able to let his coax
hang where it wants to.

Also, one leg of his dipole will be over the roof and the other in the
clear, so one leg will be detuned to throw more trouble into the mix.

To get him on the air quickly, a tuner is desirable. If he has that, he
might as well make a multi-band antenna where his feed point location is
elsewhere. I think he got that because then he asked about counterpoise and
ground, which is the next step in the evolution of that type of system.

This is a specific technical problem.

 
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
Transformer Wire = Magnet Wire as a a Light-Weight Antenna Wire {Hidden] Stealth Antenna RHF Shortwave 1 June 1st 06 09:47 AM
Counterpoise wire length Harbin Antenna 5 April 11th 06 04:41 PM
Single Wire Antenna {Longwire / Random Wire Antenna} - What To Use : Antenna Tuner? and/or Pre-Selector? David Shortwave 3 December 27th 05 09:59 PM
Single Wire Antenna {Longwire / Random Wire Antenna} - What To Use : Antenna Tuner? and/or Pre-Selector? David Shortwave 0 December 27th 05 09:18 PM
long wire counterpoise vs gnd ml Antenna 0 December 31st 04 03:10 AM


All times are GMT +1. The time now is 10:03 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