Alan Downing G3ZES, wrote:
Hello gents
Just checked the tower.
140Ft shunt fed tower free standing. Shunt fitted at 30ft.
tapping point suggested by Earl.
single wire shunt.
1800 = 1- 1.2
1825 = 1 -1.2
1850 = 1 - 1.1
1875 = 1 - 1.0
1900 = 1 - 1.0
1925 = 1 - 1.11
1950 = 1 - 1.12
1975 = 1 - 1.2
2000 = 1 - 1.4
15 more radials fitted last weekend.
Did not need re tuning.
seems to work
Alan, Topbanders:
I don't recall the size of the tower, or the pre-existing
ground system. However, I would have expected to see the
vswr curve tighten up a bit, if those 15 radials were a
significant percentage increase. This seems overly broad,
to the point where I wonder if it's swamped out by the Rgnd
losses. Am I missing something?
n2ea
jimjarvis@ieee.org
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