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Old April 18th 09, 01:13 AM posted to rec.radio.amateur.antenna
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Default Dish reflector

Jim Kelley wrote:
Cecil Moore wrote:

w7el "measured" the phase shift in current
that doesn't flow.


:-) He's good, but he ain't that good. Besides, his meter is the same
as yours in that it only responds to waves that travel and currents that
flow. The difference I suspect, is in the desired outcome and the
rhetoric.


Indeed.

I measured current, which as everyone with a Novice or higher grade
license should know is the rate of flow of charge(*). The charge flows
in one direction during each half cycle, and in the other during the
other half cycle, resulting in current which is positive for half the
cycle and negative for the other. This is known as "alternating
current". In fact, my measurement system (ferrite core transformers)
will only detect alternating current.

(*)We very commonly, although technically incorrectly, refer to "current
flow" when we really mean "charge flow".

Roy Lewallen, W7EL
 
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