LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #3   Report Post  
Old January 12th 05, 03:01 PM
Zombie Wolf
 
Posts: n/a
Default

Of course Mr. Clark, as usual, is "right on the money" in saying that 1db is
nothing. To get a 1 unit s-meter difference on the average receiver, it
actually takes 6 decibels more signal, or 4 times the power, from the
transmitter, to produce that signal increase.

Double the transmitter power (3 db) , and you get a half an s-unit increase.

In many cases, it is more advantageous to raise the antenna 10 feet or more,
than it is to increase transmitter power, and it will often result in much
more signal in the receiver, since it gets the transmitter antenna "up in
the clear", where losses to the ground and surrounding obstructions drop
off..


"Richard Clark" wrote in message
...
On Tue, 11 Jan 2005 03:30:07 GMT, ml wrote:
what would happen if i build say i'd have to stay physically small , so
say a 1/4wave verticle on 10m and then made that antenna
supercondutive?


Hi OM,

As far as performance? Absolutely no difference to it even if it were
elevated 1000°F above that to compare.

- Well maybe someone with enough sophisticated equipment might notice
a dB difference - then they would whack the side of the gear to clear
that up - nope, no difference....

You need to come to terms with just how imperceptible 1 dB is (zilch,
in technical terms), and how much power it takes (about 12%, just more
$ to burn) to make that imperceptible difference. The dollar has lost
30% of its value in the world market in the last few years - have you
noticed? This may not be one way to appreciate 1dB, but it does
reveal how relative changes go unfelt.

73's
Richard Clark, KB7QHC



 
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
Yaesu FT-857D questions Joe S. Equipment 6 October 25th 04 09:40 AM
Mobile Ant L match ? Henry Kolesnik Antenna 14 January 20th 04 04:08 AM
EH Antenna Revisited Walter Maxwell Antenna 47 January 16th 04 04:34 AM
Poor quality low + High TV channels? How much dB in Preamp? lbbs Antenna 16 December 13th 03 03:01 PM


All times are GMT +1. The time now is 06:46 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