OK,
There was a long and detailed thread about z matchers on this group abou a year
ago?
Lots of interesting stuff about line matching emerged.. dont take my word for
it have a look in the archives...
I can only describe what I measure and that is cable leakage from a jumper
between the transmitter and the duplexer when a DB products z matcher was used.
(The z matcher was very nicley made with gold plated piston caps etc.)
The cable leakage stopped when the z matcher was removed and the cable length
was altered for optimum.
Ive just dug out my line stretcher : "874-lk20L constant impedance adjustable
line- general radio USA" no striped paint here im afraid!
Ian Ashford
G8PWE
----- Original Message -----
From: [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Saturday, June 30, 2007 3:50 AM
Subject: Re: [Repeater-Builder] Cable formula
A good quality Z-Matcher has isolation caps on the trimmer ports so I don't
think the matcher itself is producing any RF radiation. I don't understand your
description of the z Matcher as introducing any
mismatch. The mismatch is already there as a result of some disparity between
the source, load
and cable impedances. All the matcher does is permit you to match the source
and cable impedances.
In a message dated 6/29/2007 4:40:45 P.M. Pacific Daylight Time, [EMAIL
PROTECTED] writes:
The z matcher is another option but in my practical experience it makes the
jumper radiate RF.... you spend all that money on RG214/RG400 double silver
plated shielding and then deliberatley mismatch it?
Ian Ashford
G8PWE
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