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LightFantastic
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How did Hertz do it with his spark gap transmitter?
LightFantastic said:Http://youtu.be/NoeuVxYoNio?t=6m15s
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
LightFantastic said: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?
Also,
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.
Why?
Because once set in motion, the electrons can argue that they are at rest, and it is everything else that is moving.
Question
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?
sophiecentaur said: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.
A Spark Gap Transmitter is an early radio transmitter design used to create radio frequency electrical signals by generating sparks between two or more electrodes. It was commonly used in the early 20th century before being replaced by more advanced transmitter designs.
A Spark Gap Transmitter works by creating sparks between two electrodes, which produces radio frequency electrical signals. These signals are then amplified and transmitted through an antenna to be received by a receiver.
The main purpose of a Spark Gap Transmitter is to generate radio frequency signals for communication purposes. It was commonly used for early radio broadcasting and communication before being replaced by more efficient and reliable transmitter designs.
A Spark Gap Transmitter is different from other transmitter designs in that it uses sparks between electrodes to generate radio frequency signals, while other designs use electronic circuits and oscillators. It is also not as efficient and reliable as modern transmitter designs.
No, Spark Gap Transmitters are no longer used today due to advancements in transmitter technology. They have been replaced by more efficient and reliable designs such as solid-state and vacuum tube transmitters.