View Single Post
  #21   Report Post  
Old August 28th 03, 07:49 PM
Richard Clark
 
Posts: n/a
Default

On Thu, 28 Aug 2003 12:18:44 -0500, W5DXP
wrote:

My basic approach is to achieve a Z0-match and therefore
forget about source impedance.


Hi Cecil,

This is a cavalier attitude if you can afford it. Otherwise, those
who so desperately hammer out the last 0.1 dB antenna gain are going
to fall to their knees in wrack when they discover that their rig's
characteristic Z of, say, 70 Ohms meeting the discontinuity of their
low pass filter's 50 Ohms turns that effort into heat behind the
antenna jack.

I have long since stopped being surprised by those who spin on like
whirling dervishes over trivial matters in the face of 10 fold losses
in front of them. This, of course, is even more trivial when they
gush on about their premium equipment that behind the knobs
"efficiently" transforms 20 - 25 Amperes of DC current into 100 Watts
RF. Now, that puts perspective to the topic: smoke and reflection
coefficient.

73's
Richard Clark, KB7QHC