Richard Clark wrote:

On 31 Mar 2004 18:02:41 -0800, (Cecil Moore)
wrote:

Richard Clark wrote in message

There is no discussion as to the genesis of
this "approximation." There is no data garnered by experiment to
support it.

That's simply a false statement.

Recite your data.

Once again: The ARRL Antenna Book, 15th edition, page 2-10, the graph
of resistance Vs reactance in Fig. 10 for frequencies from f/2 to 2f.
The same graph appears as a series of graphs in the ARRL Antenna Book
CD, ver. 2.0. Everything I said falls out directly from those graphs.

Fig. 10 is for a 1/4WL monopole so it has to be extrapolated for a
1/2WL dipole. The point of maximum reactance is approximately equal
to the (anti)resonant resistance divided by 2. The resistance at
the point of maximum reactance is approximately equal to the (anti)
resonant resistance divided by 2.

How can you guys get so upset at someone who simply describes a graph
in the ARRL Antenna Book?
--
73, Cecil, W5DXP



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