One more thing,
> In any case, an equivalent circuit diagram is presented for one stay:
> http://radio-bip.qc.ca/NEC2/isol/fig558.png
> There is no discussion about how the voltage sources are
> calculated, nor how the capacitance values are obtained.
> I'm a bit wary of that approach (which predates NEC2 by
> decades), as I'm not too sure whether one could replace
> by a simple static capacitance value a system which is
> large in proportion to the wavelength.
I had a quick look in patents, and found the following French patent from
1942 filed by Telefunken (sorry, I couldn't find it in any other language)
containing a discussion about the placement of isolators. The approach
looks very similar to the one in the book cited.
http://radio-bip.qc.ca/NEC2/isol/FR869949.pdf
BBC (that's Brown Boveri, not Auntie) filed some German patents in the
1980's where they try to reduce the number of isolators by resonating the
entire guy wires out , in various ways (DE3141533 , DE2658198) involving
tuning elements at the ground level. At first glance, I'm not convinced
that's an effective idea.
Alexandre
-- The NEC-List mailing list NEC-List_at_robomod.net http://www.robomod.net/mailman/listinfo/nec-listReceived on Sun Oct 01 2006 - 21:43:41 EDT
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