LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #19   Report Post  
Old September 16th 06, 10:48 PM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Aug 2006
Posts: 154
Default Endfeed vertical halfvawe antenna


How do all these various matching schemes affect bandwidth?
73,
Tom Donaly, KA6RUH


For the "L", it depends on the Q of the "L" network. You're not in charge
of that, you have to take the Q that the transform gives you. With a
constant inductor value, I can get pretty close to 1:1 clear across the band
just by varying the capacitor value for the frequency. Of course, if you
don't have any adjustable "C", YMMV. I'd think you need to get to a pretty
high frequency before you didn't have to add "C" to whatever exists, but the
big advantage of Voltage feed is that the current to the "Ground" is
minimal. When you don't know that your ground is zero Ohms, you're better
off putting as little current into it as possible.

W4ZCB


 
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
Vertical radiation from horizontal dipole? lu6etj Antenna 14 August 23rd 06 07:24 PM
Question is 'it' a Longwire {Random Wire} Antenna -or- Inverted "L" Antenna ? RHF Shortwave 5 November 6th 05 04:52 AM
Workman BS-1 Dipole Antenna = Easy Mod to make it a Mini-Windom Antenna ! RHF Shortwave 0 November 2nd 05 11:14 AM
Questions -?- Considering a 'small' Shortwave Listener's (SWLs) Antenna RHF Shortwave 1 January 24th 05 09:37 PM
Ideas for a homemade mobile antenna. Chris CB 152 June 24th 04 02:13 AM


All times are GMT +1. The time now is 12:00 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