No feedback loop?

I'm just a hobbyist with a PhD in economics. In my 51 years, this video is the best introduction I've ever seen about diodes and PN junctions. I am going to order the book and follow all the remaining videos in the series.

Your chanel brings a lot of knowledge. Thank you very much. Anyway, do you have any course that teach about design Op-amp

Thank you, friend!

thank you sir,how can one build that voltage supply ?

Keep it up, your so clear on explaining your circuit's

Brings me back to 1981… learning electronics from design engineers at Atari! TTL logic, RAS and CAS, and all things new! It was an exciting time in computing, and I was lucky enough to be surrounded by the best in the field.

Great video. The pelvic organ prolapse ad in the middle if it was a bit disturbing, but I guess the content creator doesn't have any input as to the ads that KZbin inserts.

I can't believe I just sat and watched an entire video about vacuum tubes! But the presenter made it so interesting I couldn't stop.

This is great! Thank you!

Sir you are a life saver. Thank you so much it makes perfect sense how the charge and discharge equations come into existence

AS USUAL EXCELLENT VIDEO PRESENTATION!WHAT IS THE OUTPUT IMPEDANCE OF THESE CIRCIUTS?

U rock dude!!! Thanks for all your videos, I’m really learning a lot

WHAT IS YOUR DEFINITION OF A SMALL SIGNAL VOLTAGE AND,LARGE SIGNAL VOLTAGE?

I can't figure out some stuff... Vin is sinusoidal, the C1 cap is gonna filter whatever trace of DC is found, but Vg1 has negative values... how is it possible ? i thought any offset is gone ... those small negative voltage values.. how do they look like? is it ac? is it dc ? My brain short circuits... please help

+250v Vpp is AC voltage ?

Thanks

WHY DID YOU USE Vpk AND,NOT Vpp WHEN USING THE LOADLINE?

23:35 if you remove the screen grid bypass cap then you are introducing negative feedback and this should reduce distortion, right?

EXCELLENT PRESENTATION!STILL HAVE TROUBLE READING THOSE GRAPHS.

Thank you for explaining this to us. Do people ever put a scope on the power supply while playing different instruments and seeing if any of them make the power supply sag ?

also make some videos about the EL504 lamp

Great to see you doing these calculations, as there are a lot of people that would really like to see the rationale behind a circuit design. Just a minor point but even in 1/2W values, you can get 750 and 9.1K (metal-film from Amazon) which would be closer and will likely give you closer results in your empirical testing. Again, hats-off to you for providing this kind of lesson! 73... 😊

Thanks for the lecture. Assignment accepted 🙂Quick question. Is the -Ve sign for voltage gain used to signify the 180 degree phase shift between the input and output voltages?

EXCELLENT PRESENTATION!I WAS HAVING TERRIBLE TIME READING THOSE GRAPHS THOUGH,CALIBRATION GOOD BUT,GRAPH TO SMALL.

Great lecture again! Quick question, with regard to Q point. What sort of basic requirements drive choosing a particular Q point for a vacuum tube type. Is it the application of the circuit, say a record pre-amp, or a headphone amp or guitar pre-amp, and/or operating requirements like efficiency, plate dissipation, available power supply, etc?

Cool! Can't wait till you get to pentodes. Btw I have designed, analysed and built some interesting topologies with pentodes you might want to take a look.

WOULD YOU DO A PRESENTATION A CLASS C AMPLIFIER?

EXCELLENT PRESENTATION!I WAS ONE OF THE LAST TO HAVE ANY BACKGROUND IN MY ASSOCIATE DEGREE PROGRAM ON VACUUM TUBES AND,I NO REGRETS ABOUT IT.I SOMETIMES THINK IT IS GIVEN A BAD RAP.

You know, that "emitter resistance looks beta times larger" deal caused me a lot of heartache at some points. When you're first exposed to transistor analysis it is easy to get lost in all the different formulas and the fact that this is a simple model to represent a physical device sometimes gets forgotten. This is a great, concise introduction to NPN large signal. Nice work, I am excited to watch your push-pull stuff and staging analysis!

Good video! You can get into Norman Koren's phenomenological equations for more precise curves, but the algebra gets imposible due to the fact that those equations include transcendental functions, especially with his pentode equations.

Can't begin to thank you enough for this course. Absolutely brilliant and makes learning easy and enjoyable!

I've been using ChatGPT as an assistant for my various projects for a while now. I've found it to be very helpful for the most part; however, it tends to want to stick to everything that has come before. That is to say, when you start to go into unknown territory, it tends to revert to things it already knows as opposed to guide you into more creative solutions. With respect to electronics, I have learned a lot simply by finding all the errors of fact and logic that it makes so I can then challenge it with the corrections. So I can give you the following advice wholeheartedly: DON'T TRUST THE ANSWERS / SOLUTIONS IT GIVES TO YOU - YOU MUST CHECK EVERYTHING FOR CORRECTNESS! I've found the new o1- series to make less mistakes of both fact and logic, but in the immortal words of Jonesy from Hunt For Red October - "I think when it gets confused it wants to run home to mama". 😉

I never knew that you have to be an electronics engineer to play the guitar.

I'm a big fan of bleeder resistors. Back in my Air Force days, I was a tech on an analog flight simulator. When power is off, most caps are drained by bleeder resistors - but not all. I brushed my hand across the leads of a big electrolytic capacitor. I got zapped hard by that cap. I grabbed my meter just to see how much charge was still in that cap. 300 volts! That particular cap is not tied to a bleeder resistor. Not sure why.

This whole series is outstanding. Keep up the good work! Well done young man!

IT WAS A CURRENT MIRROR! wtf, why nobody explained this before.

Great presentation 👍

EXCELLENT EXPLAINATION!

Great presentation

Great presentation

Enjoying working through your videos. As an aside have you already covered somewhere the design of a simple 5 watt guitar amplifier? I understand that the right approach is to start at the output and work backwards but my practical efforts so far do not get enough current running through the output transistors!

EXCELLENT PRESENTATION!WHERE DO YOU FIND THE PERVIANCE DATA NUMBERS?I HAVE NEVER BEEN ABLE TO FIND THIS NUMBERS DATA.

Cool sound. I saw someone use a special low voltage OPA opamp, he powered it from the phantom voltage over the XLR cable for a diy microphone. Maybe you wanna look up that up: OPA1642

Great video and I love MS Paint. Only weakness is saying Class B has no biasing. Audio textbooks bias Class B such as with two diodes in every example. B can have less distortion than AB.

As PSpice has a subscription cost I am using QSpice. I'll try to replicate.

Despite the mediocre outcome i think it is remarkable technologie if you think about it. You put in a jpg and some text and the algorithm recognises your symbols your denominators and even finds in some cases the right equations. When there was no internet i had to find the specific book, then sort for useable books and sort for good books which are helpful in every day problem solving. As with every new technology problems will occur when people get lazy and choose the easy cheap way over experience and testing thoroughly. And when the answers of these machines become influenced by the humans who create them.

I actually was doing this to help me figure out how to fix my amp!