How much RF current typ flows in the REF + DIR on a 3-el yagi ? YO just
shows a 'relative' scale for the parasitic ele's.
IE: just to simplify things, let's say we have 10A flowing into the 30 ohm
feed-point of the DE [3 kw] . [monoband yagi]
How much RF current do we typ have at the center of the REF + DIR ?? [as
a percentage of the DE current] 10%, 30% ??
If the REF + DIR used solid fiberglass center insulator's and the shorting
strap across em was removed, and an RF ammeter
was strapped across the insulator, what would I expect ? Is that method
valid ? I was thinking a clamp on RF Ammeter
could also be used, but typ they are not calibrated..but are only relative.
Has anybody ever tried to measure the RF current in the
center of the parasitic ele's ?? I downloaded 4NEC2 a few days ago....so
it's new to me..and at 1st glance, I don't see any mention
of exact current flow in the parasitic els. Now of course, this will all
depend on the tuning and spacing of the parasitic ele's....and
relative current flow in the parasitic ele's could vary across the band.
Tnx in advance....... Jim VE7RF
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