Thank you for the video, it is darn near exactly what I was looking for. If I were to suggest adding things, it would be to give the part number of the transistor you are using, and to show how you got the base impedance. I looked at the datasheet for the transistor I want to use and low and behold it has a piece of a smith chart showing the resistive and reactive components at a few different frequencies. There seems to be a trend so I think it is safe to interpolate a bit at least between the marked points. Thank you again for the video.

thank you for the video

8:50 I hear Milf Chart :)

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

Nice explaination

Hey Gregory, excelent video. Congratulations. I need your help! You've talked about a "blow filter" in a old video. Where can I found that content?

Could you please letm me know what's the usage of log amplifier? For a regular amp, you want to have as linear as possible. Thanks.

Hi, sorry but I still do not have clear idea what noise temperature is. So is it defined for amplifier or antenna out of blue or it depends on physical temperature? How to measure it?

is it possible to extract the data in average mode from the scope?

There needs to be a coil calculator which puts out parameter spectrums/ranges (of interdependent/covariant variables) depending on how many variables you determine/collapse. Coils can look very differently yet show the same frequency. I would've liked to set the frequency and then narrow down on other parameters by setting materially determined (available) parameters like wire radius, top load dimensions to then move on to "turn number", coil circumference. but there's no such calculator available and I'm too slow of a learner to produce it

Nunca havia visto o casamento de impedâncias explicado como esse ajuste de tensão-corrente, muito bom. É tão difícil achar boas referências em RF, parabéns pelo canal meu caro, mina de ouro em conhecimento. Sucesso!

Very interesting topic.

Sometimes his accent is tricky to understand but the content is very helpful!!

Very nice way to make us understand...you make a lot of efforts to create such nice vedios. I also listen old school people..they talk a bit slow..that makes us understand better...i wish you also try talking a bit slow...

A video I understand clearly thank you.

circuit was nice but i hv to wear soda glasses or telescope to see clearly

I also experiment with VCOs I am a hobbyist and I once tried one of these cascode oscillators for VHF and UHF. I used the 2SC3355 but the 2SC2570 is even better in some instances. It's beta is higher than the BF199. In another video ukposts.info/have/v-deo/oY90hKGkjZWLw4U.html I saw a luxurious bench and instruments, It would be great if you showed us the results of this circuit and some test points with the oscilloscope and the spectrum analyser. People love reality behind theory and chalkboard, so please set the bench and hock up probes and rock n roll.

great video, the best I have seen so far explaining the phase detector and bit recovery clock. You could implement the pulse edge detector in software by attaching two interrupts (a rising edge and a falling edge interrupt routine) performing the phase sensing.

Great video! Unfortunately for me, I'm still missing the point at which the spreading sequence applies. Will it matter if we apply the spreading sequence to the data stream - as what was shown on a slide at 6:26 - first and then mix it with the carrier or we should first get the modulated data stream signal and then apply the spreading sequence? As I see it it should produce the same result, shouldn't it?

Great video, Gregory, as always! 😉

How Can i get your Code? Do i need to be registered at all electronics? If yes, which membership is rewuired

Do you have the capacitance values you used for this circuit, trying to recreate these results in the lab. I tried with 5pf caps and a bc560 transistor and could not reproduce.

Hello! I had been trying made audio phase shifter using STM32F303 microcontroller using a copmlex FFT. BUT A processor was busy 80% of time.As a result - main logic of a program and modulation process had not been realized.Your design uses Waver principle - as I understand.

How to work with such a high frequencies? 1 pF capacitor has impedance 15 Ohm, 2.5nH inductor (1mm length of 1mm diameter wire) has impedance 18 Ohm... Any millimeter of wire can leads to parasitic oscillation in an amplifier.... I made only FM transmitter 100MHz, and 5mm of wire increase SWR. But what we will have in 10GHz? Any micrometer influences on SWR in a cable?

I'm doing the IEEE IMS competition for this year and this video helped a ton. Thank you!

NICE TRICK YOU SAVE ONLY DELTA WINDOW OF TRANSIENT TIME

After 4 years of Electronics Engineering I finally understand this stuff and it's amazing

I wish my teacher at university had explain it like this

great job Greogry! You have solid RF fundamentals knowledge- Thank you

Hello my friend! I really appreciate your UKposts Channel, your content is amazing! I'm learning a lot!

Excellent explanations!

This is the best video I have ever seen on Tesla coils- how it only has ~2.8k views is beyond comprehension. I have one question about the Boost PFC- how do you charge the capacitors to the initial 325V without massive inrush currents? is there a pre-charge system that cuts out once the initial charge is established?

The video is good but your soldering skills need a check

But what if we take the cross correlation in the time domain and average? Since jitter is the time domain equivalent of phase noise, would this reduce the jitter of the signal?

I have been watching youtube videos on electronics for years, but I have never seen anyone explain the operation of amplifiers as clearly as you. For the first time I actually understand how an audio amp works. Well done and thank you.

HI! this is a beautiful project. I would be interested in reproducing the sampler to lock my HP 86290C. Do you think that as it is it can work decently up to 6GHz? I would like to have a diagram, or at least the abbreviation of the balun you used. Thank you so much for your kindness!

How can we have these matlab codes?

QUE PIJE VIDEO! Really helpful and insightful. Greetings from Central America.

Interesting topography but discreet. I think opamp based would be closer to the real log function.

Welcome Don't forget it

Excelente erxplicacion de como usar el diagrama de Smith!! Gracias por tu trabajo Gregory

Gregory el analizador vectorial analogico HP que ternes esta muy bueno!!! lo has comparado con los nano VNA? Vi tu video una vez mas porque estoy intentandp diseñar una etapa dce osciloscopio con barrido equivalente, basado en tu sampler. Gracias una vez mas

Perfect didactic, Greg! Thank you!!!

rise time is measured in [time] units, and slew rate is measured in [level/time] units. that ought to tell the whole story.

Hi how much is the maximum input voltage of this sampler? What is the main difference of 2diode and 4 or 6 diode samplers?

This was the best explanation of DRSSTC I’ve seen. And I’ve been watching a lot of videos looking for this level of information. I’m a soon to be old guy, getting into electronics to keep my brain occupied. I’ve always been fascinated with Tesla Coils and have been attempting to construct my own with varying levels of success/failure. In all your free time, do you think you can visit the topic of the Slayer Exciter Circuit version of a Tesla Coil and the hybrid Solid State , Spark Gap variant? Electronics is a slippery slope, every time I learn something new, I realize how much more I don’t know. You do an excellent job conveying your point and explaining it in a way that demands engagement. Thanks sooo much! I look forward to the rest of your videos!

Hello, how are you, you no longer have a course for sale at hotmart.

What is this setup or technique called? I need to know more about this, it works for me but for some strange reason it only goes up to 130MHz, I already tried with other ferrites, more or less turns on the ferrite, transistors up to 6GHz, but I still can't exceed 130MHz.

Hello! The LC tank load in one side on 100-300Ohms input impedance.The same situation on the output. So, the LC circuit has low quality factor, and has bad stability (but the PLL with a quartz is in charge for it). Am I right?

Skaisti :) Tālāk jau var domāt par 10GHz SSB uztvērēju.