Vacuum Tube Tesla Coil Topic [Part 1 /how it works (roughtly)]

Hey.
Thats my first video, trying to explain a littlebit the function of the oscillator circuit.
More about the tuning etc. will follow.

#teslacoil
#electronics
#howtomake

[dominikhejl]

explaining university level of physics behing tesla coil in different language can be quite difficult, that's understandable. the more you practice, the better you'll become. as i look at your schematics, vacuum tube oscilator seems quite simple. i am already familiar with tank circuit and resonance between secondary and primary. i think it's far easier to make secondary and then measure it's resonant frequency, since you can't account for most variables when calculating properities of the coil. the only thing i am not familiar with is the tube itself and it's control. i also wonder what advantages two vacuum tubes bring compared to just one. most likely i will order one GU81 tube after i get the pay for january. 😁

[Kangsteri]

There's a big difference between Tesla coil (step up transformer / forced frequency) and Tesla tower (MTech industries circuit / reversed 336, 961 Tesla patent, that is based on natural frequency).

[edgarw]

In the work I do with mosfet switching, a Adams motor using a Lamp for the gate / grid control is verry good and used in power circuits. ( protection ), The grid resistor can be a potty / variable resistor before the lamp which goes to the grid of the valve.

[paulvale]

Well explained, I learned something so mission accomplished. Danke.

[edgarw]

Ebenfals Tesla hat fuer primieare spulen immer ein draht durchmesser abstand gewickelt. fuer bessere oscilation performance. Deine beschreibung ist sehr gut. Mein erstes RODIN form Tesla coil habe ich gesehen vor 60 jahren.

[qutube]

Deine Englisch ist besser als meine Deutsch !

[Kangsteri]

Resistors are usually hidden coils too, if they aren't carbon. The old circuits often had tunable capacitor.

[johanrheeder]

Great video, The breakout is nice for YouTube clicks but Me think a waste.

[janno]

The gridleak network turns it into class C operation.
So class C is were the tube only conducts for a small time sub 180° of the sine wave.

How it works is that when a positive voltage is induced into the feedback coil you will get grid current, thus a voltage drop on that resistor.
Thus the capacior will be charged and will hold a negative charge and hold the grid negative until the next conduction time comes for the tube were the positive Feedback coil voltage will overcome the capaciors negative bias.

Thats the way I understand it and I think there is a book that desctibes how it works i need to dig that up.

There is also a "gridleak" that has the resistor going to ground. Exactly how a capacitive coupling stage works in an amplifier, but its not really a "gridleak"

[edgarw]

Sehr interesant was du zeigst, wer ein hohes ausganspotential in der ausgangspule erzeugen moechte, dann muss da die kupfermasse in der erde groesser sein wie der do-nut oben. Aluminium hat @ 30 % weniger electron fluss moeglichkeit. Ein anschluss an ein erdkabel von der steckdose genuegt nicht um das max potenzial zu erzeugen. Danke fuers sage dazu erde energy abstrahlung . LOL. Down under.

[edgarw]

Die ausgangs spule ist ein Dipole, so es muss dann auch ein nord oder suedpole zeigen mit dem kompass.
Der oscillator schwinkt auf einer frequenz, wie ist es nun mit der secondary spule ? es ist moeglich das sie auf eine anderen harmonische frequenz schwinkt.