On Dec 10, 2004, at 9:27 AM, W3FPR - Don Wilhelm wrote:
One of the 'funny' properties about RF is that it will always find a
(ground) reference somewhere - that may be from any wire, chassis, PC
board or even your body. Whatever the RF finds convenient will be
used as its ground reference.
BTW, a half wavelength wire connected to ground at the far end will
behave just like a quarter wave that is open at the far end - think
transmission line (and antenna wire) behavior.
Doesn't this cause a bit of an RF-philosophical problem? If one end of
the half wave is supposed to determine RF ground, how does the RF know
what's at the other end is also ground? I should think that simply
grounding it to the earth would not do the trick if, as in your
original message, the RF hasn't already "found" it as a convenient
ground.
best wishes,
dave belsley, w1euy
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