Vacuum Tube: How Does It Work? (Part 3)

Using a hydraulic music system of his own design as a model, Adnan Arduman tries to cover how a vacuum tube works. His objective is to make his speech comprehensible even to people with no technical or engineering background.

Category:

Science & Technology

Tags:

• vacuum
• tube
• electronics
• amplifiers

[latestsaint]

great vid Adnan. i enjoyed it thoroughly :)

[improvised440]

@latestsaint Thank you very much.

[Mrluke1308]

The best tutorial on vacuum tubes ever, thanks!

[improvised440]

@Mrluke1308 Thank you very much!

[748ducky]

Fantastic teachings. I thoroughly enjoyed and understood what you were explaining. Nothing I've ever read or been told has been quite that clear! Very very good! Thank you!

[hydrolisk1792]

Wow, I wish that I had teachers like you back in the day. I would have learned a lot more than.

[jdansti]

Thank you!!! I have a Dynaco tube amp that my father built in the 60s and now I understand how it works. I am also interested in triode tube based overdrive effects for guitar. When you explained the Class A amplification you said that you need to keep the negative side of the sine wave above zero. In an overdrive effect, does the bottom of the wave just get clipped? If so, is that what causes the "fuzzy" distortion?

[nickdrivinby]

Great tutorial! Thank you very much!

[samlongman1]

Very clear explination. Thank you.

[improvised440]

@44433391 Thank you for your concern. Being on the west side of Turkey, we were fortunate this time.

[improvised440]

@44433391 Yes, bias current is a must for all tube amplifiers both pentode and triode. To determine the amount of bias you need to use the tube curves, or the curve of the specific tube that you are going to use.

[improvised440]

@44433391 This is a very complex question and unfortunately cannot be answered in a few words. The best way to deal with it, is to try to understand the tube curves. When you plot your bias point and the voltage swing (based on the limit power), you will see it better. The same is also valid for the preamp stage (voltage amplification).