LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #19   Report Post  
Old August 17th 05, 01:08 AM
Mike Coslo
 
Posts: n/a
Default

MD wrote:
"Frank" wrote in message
news:X2lMe.197169$tt5.130324@edtnps90...

I failed to notice you did not want to use open wire line. If you use
inductive loading, for example: nominal 46 uH, Q = 200, at 15 ft from each
end of a 66 ft dipole. The radiation efficiency is 71%, i.e you loose 1.5
dB in the loading coils. The input impedance is 28 ohms, and the losses


on

60 ft of RG213 will only be 0.24 dB. Orientation of the dipole is
unimportant since at 30 ft high the radiation is essentially
omni-directional.

73,

Frank



Hi Frank,

Unfortunately using open-wire is not an option, as I have to feed the
feedline in through the exterior brick wall of the house. I have 2 feedlines
running out now. One to the R7 and the other for experimenting. I am going
to try your suggestions with the loading coils, as soon as I get back from
vacation!!


Can you get something through a window? If the window can be opened,
you can place plexiglas or wood in the window, and then cut the
appropriate openings for ladder line.

- Mike KB3EIA -
 
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
Short lot 80 and possible 160 antenna suggestions Rick Scott Antenna 6 January 31st 05 07:53 PM
Discone antenna plans [email protected] Antenna 13 January 14th 05 11:51 PM
significance of feedline orientation Brian Shortwave 6 October 22nd 04 01:43 AM
LongWire Antenna Jim B Shortwave 5 March 2nd 04 09:36 AM


All times are GMT +1. The time now is 07:39 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