Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old October 6th 05, 06:00 PM
Denton
 
Posts: n/a
Default top loading vertical antenna?

I have a 48 ft vertical that I wish to shorten 10 feet, and use top loading.
Whats a good rule of thumb....use 3 drooping top loading wires each 10 feet
long? thanks...


  #2   Report Post  
Old October 6th 05, 07:28 PM
Richard Clark
 
Posts: n/a
Default

On Thu, 6 Oct 2005 10:00:01 -0700, "Denton"
wrote:
I have a 48 ft vertical that I wish to shorten 10 feet, and use top loading.
Whats a good rule of thumb....use 3 drooping top loading wires each 10 feet
long? thanks...


Hi Denton,

One rule of thumb I've seen is that the radius of the top hat is equal
to twice the height it replaces.

Of course this probably varies considerably with the number of spokes
and the proportion of the actual height to the equivalent height. What
gives me pause to wonder is that if you can support 3 drooping hat
wires, why can't you keep one going straight up? You already have a
48 footer, why do you want a 38 footer with a hat? To give it the
appearance of being 58 feet? Why not a 48 footer with 5 foot top hat?

73's
Richard Clark, KB7QHC
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
Questions -?- Considering a 'small' Shortwave Listener's (SWLs) Antenna RHF Shortwave 1 January 24th 05 09:37 PM
Discone antenna plans [email protected] Antenna 13 January 14th 05 11:51 PM
Short STACKED Vertical {Tri-Band} BroomStick Antenna [Was: Wire ant question] RHF Shortwave 0 February 23rd 04 12:59 PM
Mobile Ant L match ? Henry Kolesnik Antenna 14 January 20th 04 04:08 AM
Poor quality low + High TV channels? How much dB in Preamp? lbbs Shortwave 16 December 13th 03 03:01 PM


All times are GMT +1. The time now is 12:07 PM.

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