Thread: Dual-Z0 Stubs
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Old May 8th 09, 12:45 PM posted to rec.radio.amateur.antenna
Cecil Moore[_2_] Cecil Moore[_2_] is offline
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First recorded activity by RadioBanter: Mar 2007
Posts: 3,521
Default Dual-Z0 Stubs

Tom Donaly wrote:
If Roy and Tom Rauch couldn't make you see reason, no one can.


Roy and Tom are the ones committing the technical
blunder of trusting their phase measurements using
a current that doesn't change phase relative to
the source phase anywhere up and down the thin-wire
1/2WL dipole. Now you and others are helping them
to sandbag their technical myths and hoodwink the
unwashed masses. If that's what you want for a
reputation, be my guest.

EZNEC agrees that the relative phase of the current
on a standing wave antenna doesn't change anywhere
on a 1/2WL thin-wire dipole so it cannot be used
to measure the phase shift through the wire. EZNEC
says that the phase of the current on a standing
wave antenna changes about 1 degree for every 30
degrees of antenna wire. Roy and Tom would have to
admit that is considerably faster than the speed
of light. Of course, that's exactly what the
lumped-circuit model presupposes - instantaneous
propagation through the lumped-inductor.

Since that current cannot even be used to determine
the phase shift through the antenna wire, how can anyone
honestly assert that it can be used to determine the
phase shift through a loading coil?
--
73, Cecil, IEEE, OOTC, http://www.w5dxp.com