--- On Fri, 9/11/09, Steven Schultz <steven.schult...@gmail.com> wrote:
From: Steven Schultz <steven.schult...@gmail.com>
Subject: Re: [Repeater-Builder] Diplex antenna installation using coaxial cable
for 10M and 6 M
To: Repeater-Builder@yahoogroups.com
Date: Friday, September 11, 2009, 5:29 PM
Thanks Mark and John for your response.
I can appreciate using the Comet CF-360B duplexer as a quick solution, John.
Thanks.
Mark, I can also see the matching bandwidth being better with shorter
transmission line.
But my concern is that 1/4 wavelength transmission line sections seem to
be very inferior to the 1/2 wavelength transmission in achieving a good match
for both antennas at their respective resonances. I will review my simulations
and see if match bandwidth is adversely affected by the 1/2 wavelength
transmission line. I will try to include cable properties.
I wanted to know if I was way off base in my look at things and you guys have
helped.
Steve
WB8WGY
YOu have to remember that a 1/4 wave will 'reverse' the impedance and the 1/2
wave will just repeat. I have not really looked at your system, but I think it
is the 1/4 wavelengths in coax that isolate the two antennas.
