View Single Post
  #85   Report Post  
Old June 14th 05, 06:25 PM
Buck
 
Posts: n/a
Default

On Thu, 9 Jun 2005 00:27:26 -0400, "Fred W4JLE"
wrote:

No buck, the line is always longer than 1/2 wave. It is a matching section
from what is at the antenna to 50 ohms, and then 1/2 wave from that point.

"Buck" wrote in message
.. .
Pardon me while I learn from this discussion.

The 450 ohm antenna is designed to be tuned by using exactly 1/2
electrical wave lengths to match both the transmitter and antenna.
This should mean that any differing feedline should work equally as
well (except for the losses) if I am correct....

SNIP


On Wed, 08 Jun 2005 20:41:58 -0500, Cecil Moore
wrote:

Buck wrote:
Pardon me while I learn from this discussion.

The 450 ohm antenna is designed to be tuned by using exactly 1/2
electrical wave lengths to match both the transmitter and antenna.
This should mean that any differing feedline should work equally as
well (except for the losses) if I am correct....


What you are missing is that first piece of matching section
which can be any length less than 1/2WL. After that first
piece of matching section, you could indeed switch to a
different characteristic impedance. Congratulations, you
have just invented the G5RV. :-)



Fred, I believe that you and Cecil are 180 degrees out of phase. Did
someone make a type-O?

--
73 for now
Buck
N4PGW