How did Hertz do it with his spark gap transmitter?
6:21 he generates an alternating current which runs alomg these rods and acoss a gap...
Dang you, Jim! Generates an alternating current? Talk about misleading... more like a temporary AC from a DC source
Well I've never quoted myself before. Isn't this incorrect? Current in a DC battery never changes direction, therefore it is not AC in nature. Is there a better term for this?
If I tap the leads of a 9V, not only will current flow, but I will also get radiation. This radiation will seize to radiate when the current IS flowing.
Because once set in motion, the electrons can argue that they are at rest, and it is everything else that is moving.
If I disconnect the leads from the 9V, I should get radiation again, correct?
How should I explain to someone the source of radiation? Movement of charge? I think that is misleading. How about when charge changes its state of motion?
The example of a Spark Transmitter is not the best one to use to get an understanding of how RF power can be radiated
I think you are confused because you are trying to understand something that is too far down the line from your present state of knowledge. It has already been mentioned that the act of interrupting the flow of Direct Current in a circuit will produce a high voltage spike, The energy in this spike happens to contain non-DC components (RF), which is what can be fed to an antenna, when you use a suitable Inductor and Capacitor. You just have to accept this unless you want to learn some basics of circuits and circuit components. Just look at all the images that a google search of "spark gap transmitter" will show you. There is more to the circuit than just a battery with a switch.And thus my confusion with Hertz and his gap. I see no reason for it.