Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old April 5th 04, 12:25 PM
H. Adam Stevens, NQ5H
 
Posts: n/a
Default

sigh
"Cecil Moore" wrote in message
...
H. Adam Stevens, NQ5H wrote:
I prefer resonant antennas and transmission lines that match them.


I prefer non-resonant antennas and transmission lines that resonant them.

:-)

It's "resonate", Cecil, and the antenna still won't be resonant.


You just can't beat a resonant antenna for radiation.


Maybe not, but you can equal them. A tuned transmission line resonates
the antenna system.


When you get a lossless line. And the antenna still isn't resonant.


Tuners squander AT BEST 1 or 2 db.


That's why I don't use a conventional tuner.

So build your antenna resonant, match it, and don't bother with a tuner.


Or build your antenna non-resonant and match it with a series section
transformer.

If impedance transformation is necessary, use a transformer;


IF impedance transformation is necessary, use a transmission line
as the transformer. :-)


Not the least lossy approach.
Matched impedance = max power transfer.

--
73, Cecil, http://www.qsl.net/w5dxp

73
H.


  #2   Report Post  
Old April 5th 04, 04:46 PM
Cecil Moore
 
Posts: n/a
Default

H. Adam Stevens, NQ5H wrote:

"Cecil Moore" wrote:
Maybe not, but you can equal them. A tuned transmission line resonates
the antenna system.


When you get a lossless line. And the antenna still isn't resonant.


So what? If you move off the resonant frequency, your antenna still isn't
resonant. I'd rather have a resonant antenna system on many frequencies
and many bands than an antenna system resonant on only one frequency.

IF impedance transformation is necessary, use a transmission line
as the transformer. :-)


Not the least lossy approach.
Matched impedance = max power transfer.


Depends upon how much money you want to sink into your coax. Open-wire
line with an SWR of 10:1 will beat RG-213 in the loss department on 80m.
It takes 9913 to equal the performance of open-wire line with an SWR of
10:1 on 80m and 9913 costs about three times as much as open-wire line.

And with open-wire line, one can enjoy all eight HF bands immediately,
and not have to spend two days cutting and trying a fan dipole.
--
73, Cecil, W5DXP



-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----
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
Inverted ground plane antenna: compared with normal GP and low dipole. Serge Stroobandt, ON4BAA Antenna 8 February 24th 11 10:22 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 Antenna 16 December 13th 03 03:01 PM
QST Article: An Easy to Build, Dual-Band Collinear Antenna Serge Stroobandt, ON4BAA Antenna 12 October 16th 03 07:44 PM


All times are GMT +1. The time now is 03:38 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