Wow

without the diode, just pray and hope that the transistor won't short and it will just opened. 😆

What is different between using the electrical delay feature and calibration after adding port extension?

Your Best ❤

When did you start learning electronics? I am nearly 16 and I still am very unexperienced about this.

Your explanations and clarity of presentations for all your videos that I have viewed are superb. Thanks for the excellent work you do. I fully agree with M@marcozbo. Great job.

Any difference between the 30 and 45 amp connectors, re: fitment?

Quick question. Why do you have a 20ohm resistor between the transistor (MPSA42) emitter side and ground? thank you!

You’re a freaking genius, how the hell did you figure it was the VNA out amplitude. And how did you figure the amps input limit. I’m 59 yrs old I wish I had your brain. Great video 👍. I have a nanoVNA and I don’t remember why I bought it hahaha.

Very good demonstration. I have read slew rate in datasheet often but understood it really with this demonstration and explanation. I like the attenuation box you use.

Hi, very informative video. I have similar doubt while making the current source. I'm using a FET and op-amp for feedback method to generate a constant current source. It's showing the same problem with different load. Can you suggest how to rectify that? It will be very helpful for me.

For a beginner, this ALL can be quite daunting. Thank you for your simple tutorial!!! m

As I said again and again you are my role model, THANK YOU

Pat W5WTH. Warp speed, man. Thanks Alan for teaching me something new. I was able to check the coax I repaired after the dog ate it. Come to find out my repair was a good one! Video making two new ones… The dog ate my coax! RG-316 BNC with ferrite beads. Make two for the cost of one! ukposts.info/have/v-deo/hmh3lmx7hKuoqok.html

Without a sprectrum anylizer. If my amplifier has a nice linear waveform like that, then the imd would be at least decent? Or the two not related? Ive got a old heathkit station monitor similar to the kenwoods.

Awesome tutorial. Thank you!

Alan, have you ever done a video on the SIDAC ? This component is a tricky little bugger.

👍Thank you sir.

👍Thank you sir.

👍Thank you sir.

👍Thank you sir.

👍Thank you sir. please teach as about dual gate mosfet.

Display was blank so thanks to your video I pressed the reset button and it started working fine again, thank you!, thank you!, thank you!

Perfecto!

This is the BEST video I found that details the test point locations to validate if a flyback protection circuit is working via an oscilloscope! Thank you!

Great video! Thanks.

👍Thank you sir.

👍Thank you sir.

👍Thank you sir.

👍Thank you sir.

I imagine that capacitance of a diode like a bridge for cars if the bridge is too narrow it cannot pass any car ;) Sorry it is just my imagination ;) By the way it is a shame that nobody talks about VHF/UHF components, every video i watch it is always about basic staff. Never something at least for the people who has some knowledge already but wish to know more... but maybe I would like to have too much from the internet. In VHF very strange but interesting things happen. I have noticed that Toshiba has nice diodes with low capacitance for VHF applications but forward voltage is quite high like 1 v, I can't find any diode with low capacitance and low forward voltage like at least 0,3 V (like kind of a germanium diode).

Great tutorial. Thanks!

Been binge wathcing your videos to learn as much as possible in as short a time as I can. Thank you so much for sharing your knwoledge with the world!

Great lesson!

I've been a Radio Amateur for 45 years, but only now have I decided to dedicate myself to CW. I hope to meet you on the radio one day. 73 - PY1 VPK - ROBERTO - BRAZIL

wonderful, thank you 😊😊

Hello`al from tokyo l`ve chelegance jncradio VNA 3G and nano VNA-F V2

Need to ask my 78 year old Navy vet if he still can recall his Morse training. I never learned Morse 55 years ago - when friends did.

So the question is: Is a tantalum capacitor also an *electrolytic* capacitor? Wiki says yes. There are two basic types of tantalum capacitors - wet and dry electrolyte types. Please don't confuse the natives out here! ;-)

My son learned Morse code and signal flags for a special merit badge celebrating scouting’s centennial anniversary.

Interesting video! It is very easy - but I have not made good active RF mixer - there was parasitic generation or something else (for example big time constant in base of an oscillator). I had good results only with passive mixers - diode or a mosfet switch.

why magnetic fiedl discharge curent and produce voltage only in one direction.

Best explanation of the cascode stage!

I managed to do it, although the pattern displayed on my Smith chart was a very tight circle, so the resistance didn't change much away from 50 ohms as I scrolled through the resistance. Quite glad about this, since it was a 50 ohm cable! I'll try again with a piece of 75ohm cable. Thank you for that. One comment: in your videos, you very often "take" values to perform operations on them. It's unnecessary, and in British English, "take" can be interpreted as "subtract". This first time I heard it, I thought "take it from what?" Hope this is useful. 🙂 Thanks again.

Well this is a bummer. Makes me wonder if that's why they discontinued these. I have two of them so now I'm wondering if either or both of mine are susceptible to this. Would assume so...

20 years ago, i went to germany to meet a ham i met on 20m cw. Before i left i made him a small box with a PIC processor tha flashed his call sign on a white led. He used it at night while out running. A local policeman decoded it and knew it was my.friend. pulled.him over. Kind of a neat story i thin k.

Another great video. I bought the '75 after seeing this - and ended up buying the LCR and ESR testers as well. Really handy on the bench...

Wow! What a perfectly presented video. A very precise and simple process to follow; pleasant voice and well spoken, excellent enunciation. Great work, w2aew !

Hi Alan, I'm asking in this video since I'm not sure how else to reach you. What is the main difference between a dedicated RF signal generator and a function generator (AWG)? Is it perhaps that the RF signal generator can more easily generate VHF and above frequencies and very weak signals strength, whereas the typical funciton generator generates relatively lower frequencies compared to the RF generator and is and would tipically require external attenuators for RF work? Is there really a difference between say a 14MHz sine generated by an RF generator vs a funciton generator? Would you considering covering this in a video? Many thanks, Alex M0OOV

For an emitter follower, it helps to stabilize the collector current with two additional transistors. That way the B-E voltage is constant, the gain is closer to 1, and the already low distortion is even lower.