Pete,
Does your MFJ 259B separate out reactance and provide the sign (complex R+jX
rather than only Z magnitude)? I thought some MFJ models only read
magnitude of the impedance.
If the 259B reads complex Z, did you observe a point where reactance went
from one sign to the other as it crossed zero? If we knew the feedpoint Z
and type of line (we know the line length), we could then easily calculate
the Z at the input end of the line, including sign of the reactance and
compare it against your results.
Paul, W9AC
----- Original Message -----
From: "Pete Smith N4ZR" <n4zr@contesting.com>
To: "TowerTalk" <TowerTalk@contesting.com>
Sent: Monday, October 07, 2013 7:53 AM
Subject: [TowerTalk] Reactance at end of feedline
Us history majors sometimes need to ask elementary questions, so please be
kind.
Yesterday I was refurbishing my 80M lazy-vee dipole array, measuring the
center frequencies to adjust as needed. On my MFJ259B, the reactance at
the end of the 88-foot feedlines reached a minimum of only about 45 ohms
before starting back up. Does this value reflect the inductive reactance
of the feedline?
--
73, Pete N4ZR
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