Blocking Oscillator - Vacuum Tube Oscillator

Gregory explains the Blocking Oscillator topology, used in the Vacuum Tube era, as the standard way of creating pulses and periodic signals in electronics.
The Blocking Oscillator is a relaxation oscillator, that uses positive-feedback, accomplish by a pulse transformer, to create narrow pulses with very fast rise/fall times. It was one the most used Vaccum Tube Oscillator type.
The pulse repetition rate and pulse width is defined by a complex interaction between the tube grid capacitor, grid resistance, pulse transformer magnetizing inductance and the tube characteristics.
Read my article about the Blocking Oscillator
gusbertianalog.com/blocking-o...
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Reference:
worldradiohistory.com/BOOKSHE...

[@AllElectronicsChannel]

Support the channel becoming a Patron patreon.com/allelectronics

[@josiasaleixo347]

Ola Gregory. Eu Josias Aleixo Demorei te encontrar, mas hoje May 10, 2024 1:18am. I found you. Bom trabalho como sempre.

[@ahmedgaafar5369]

Hi Gerg, this is the first time to see cooking electronics...my wife would probably kill me if i dare bring my oscilloscope in the kitchen ...lol....awesome Brother as usual.

[@AllElectronicsChannel]

Hahahah 😂😂

[@W1RMD]

Well done! Good use of colored markers to indicate what is going on in the circuit. Thank you for incorporating vacuum tubes to your videos.

[@AllElectronicsChannel]

:) :) :)

[@philipkc1095]

Very, very excellent explanation of the fundamentals and the complete working of the oscillator, good

[@AllElectronicsChannel]

🙏🏼🙏🏼🙏🏼

[@VividSolutions]

Excellent explanation, fascinating stuff.

[@AllElectronicsChannel]

Thanks! 😝😝

[@_wave64_]

This is very interesting - this model (magnetizing inductance "stealing" current) also explains the minimum cutoff frequency of all transformers in general.

[@AllElectronicsChannel]

Yep! Thinking of magnetizing inductance explicit helps to understand a lot of circuits using transformers

[@janno288]

Very nice and informative video!

[@AllElectronicsChannel]

Thanks! ☃️☃️

[@argcargv]

That is an interesting point.. it is the energy stored in the transformer that is switching the tube off because that energy has no where else to go.

[@iuri.castro]

Great video, Greg! Why not try an audio amplifier using tubes next time, would be very interesting!

[@AllElectronicsChannel]

🤭🤭🤩🤩

[@PedroCruz_Zurk]

Where are the podcast videos with the professor of telecommunications and physics in Portuguese?

[@deepaknarayan9729]

🎉

[@AllElectronicsChannel]

☃️☃️☃️

[@two_number_nines]

this circuit is very similar to a joulie thief

[@argcargv]

Yes, the joule thief is a transistor based blocking oscillator.