File talk:Hertz first oscillator.png

Resonant frequency

The caption indicates the resonant frequency is about 100 MHz, and says this is "about the frequency of modern television transmitters." I have two issues regarding this:

1. The resonant frequency of a simple wire 2 meter long dipole antenna without the end loading would be approximately 75 MHz ($\lambda \div 2$), and the loading spheres at either end would tend to reduce this significantly;
2. Modern broadcast televsion has been all but banished from the so-called VHF low band (54-88 MHz) in the United States (as well as other localities).

I produced an NEC-2 model of this antenna; the spheres used many segments, precluding its reproduction here. Nevertheless, output from the NEC-2 engine nec2c indicates a free-space resonant frequency of 35 MHz.

There is no source cited for this resonant frequency. Does it constitute original research?

Am I missing anything? Unless the 100 MHz resonant frequency can be verified by a reliable source, I recommend that mention of it be deleted. Further, because modern broadcast TV occurs almost exclusively on frequencies in the so-called VHF high band and UHF, I recommend that the reference to modern television transmitters be deleted. Lovibond (talk) 00:04, 15 June 2016 (UTC)