Richard Clark wrote:

Cecil Moore wrote:
these voltages match the voltage drops across R1 and R2
in amplitude.

There is NO R1 and/or R2

I gave the reference, Richard, and am looking at it right now.
Page 27-9 of the 15th edition of the ARRL Antenna Book. R1 and
R2 are 10 ohms each.
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73, Cecil http://www.qsl.net/w5dxp