[Antennas] Tower Installation, cont'd
Eric Jones
ejones at hiwaay.net
Thu Oct 1 15:18:13 EDT 2009
de N4TGC Eric
I thot it was "bald" face lie ... apparently, the ARRL did finally buy stock
in a window-line company, as they started promoting it in the last few
years, in their Antenna Handbooks. I suspect their rational for coax was
the same reason they dropped link-coupling in the 50's and went solely to
PI-net output designs: link coupling permits working on harmonics whether
you intended to or not. PI-nets and coax are inherently narrow-band.
I tried using coax on a drooping doublet, and it tuned so sharply as to be
virtually useless (who can operate on 7.14 mc forever?!) With the same
wires fed with 450 ohm window-line, I can work four bands across the board,
using an MFJ-941D.
If the ARRL would pit us against each other instead of lying to us all, they
could achieve the same results without making so many enemies: when they
stole bandwidth to create Tech, Advanced, and Extra Class Hams, the apparent
intention was to displace the overload of Old Farts who were clogging up the
bands. All they'd needed to do was tell us that's what they were doing, and
naturally, the OF's would point the finger (guess which one) at each other,
none believing it was them being the intended target ...
When they deign to get the old 3 - 4 mc 'boat' band for our use, for which
their sponsors can sell virtually no new equipment, then I'll re-join
gladly.
e
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