- #1
Atomillo
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- TL;DR Summary
- How is the oscillating voltage in the grid of a Barkhausen–Kurz tube created?
Hi:
Due to the quarantine I have more free time, I've decided to learn more about electron tubes. Currently, I'm trying to understand how the Barkhausen–Kurz electron oscillator works.
Now, I've been able to understand the calculation of electron motion inside the device and why they oscillate around the grid. According to Wikipedia (Wikipedia), the reason the current ouput is so low is because it consists entirely of the electrons hitting the grid and plate. What I don't understand is how the voltage appears on the grid.
Again according to Wikipedia, it is "induced". At first I thought about electromagnetic induction. However, the magnetic field produced by the moving electron is always perpendicular to the grid (in a parallel plane geometry), and thus the magnetic flux is always cero right? What is "inducing" the voltage then?
Thanks for all the help.
PS: I post this in the physics forum instead of the engineering one because I'm interested in the physical mechanist that causes the voltage itself. If it is in the incorrect place tell me please.
Due to the quarantine I have more free time, I've decided to learn more about electron tubes. Currently, I'm trying to understand how the Barkhausen–Kurz electron oscillator works.
Now, I've been able to understand the calculation of electron motion inside the device and why they oscillate around the grid. According to Wikipedia (Wikipedia), the reason the current ouput is so low is because it consists entirely of the electrons hitting the grid and plate. What I don't understand is how the voltage appears on the grid.
Again according to Wikipedia, it is "induced". At first I thought about electromagnetic induction. However, the magnetic field produced by the moving electron is always perpendicular to the grid (in a parallel plane geometry), and thus the magnetic flux is always cero right? What is "inducing" the voltage then?
Thanks for all the help.
PS: I post this in the physics forum instead of the engineering one because I'm interested in the physical mechanist that causes the voltage itself. If it is in the incorrect place tell me please.