On 21 Nov, 12:31, (Richard Harrison) wrote:
Richard Clark, KB7QHC wrote:

"Heinrich Hertz might have something to discuss with you about his
experiments."

Anyone should be so honored! Heinrich Rudolph Hertz (1857-1894) was a
pioneer experimental investigator of electromagnetic (EM or radio)
waves, according to B. Whitfield Griffith in "Radio-Electronic
Transmission Fundamentals'. Hertz in 1887, eight years after the death
of J.C. Maxwell (the predictor of EM waves) proved Maxwell correct.
Hertz did so by generating the first man-made EM waves in his
laboratory.

I believe the Hertz antennas consisted of loops which did not depend on
presence of ground for operation. Hertz was able to create a severe
electrical disturbance in one loop and across a gap in the second loop a
spark would jump.

Hertzian radio waves are said to lie between 10 kHz and 30,000 GHz, and
probably include the range of Art`s antenna.

Yes it does. But it is only half of the story since it basically is
missing half of the circuit which the spark was looking for .
As you know a requirement is to keep the LC ratio, so basically he
had a tesla coil which is the opposite and was looking for the
capacitor
When you have both of these THEN you have the "circulating" current
which creats full radiation.This circulating current is ofcourse
in the form of pulses at twice per period where the spark is one of
them that is uncontrolled with respect to the frequency of the circuit
It is indicative of the time constant involved which is also a
requirement
of radiation
Close but no cigar.


A Hertz antenna is said to have its resonant frequency determined by its
distributed capacitance which varies according to its physical length.

I would argue with that based on the LC ratio for present day
radiators
but for Hertz it would be correct since his radiator did not have the
inductive storage of energy which was dissipated in a spark and not
returned to the capacitor.
..



Best regards, Richard Harrison, KB5WZI
Best regards
Art Unwin ...KB9MZ...xg (uk)