Thanks Dave and Steve for your comments. I will certainly contact Butch and
much appreciate the intro.
I had thought that a detuning skirt was the same concept as electrical
trapping, and it clearly is not.
In the latter case one simulates a parellel tuned circuit over a section of a
tower - which means that it should be tuned for maximum current in that section.
I can see with a detuning skirt on a structure that is less than 1/4 wave high
that tuning for minimum current would make sense as an ungrounded quarter wave
will not couple significantly. If on the other hand the structure is a half
wave high, it seems to me that minimum current would be the wrong thing as an
ungrounded half wave will merrily couple furiously....
It's at times like this that I realise (again) that things that are apparently
quite simple really are not!
73 Roger
VE3ZI
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