Thank you, you made me a better engineer than I was 10 minutes ago

I think I just learned more in ten minutes than a month of physics class.... and if I'm not mistaken you did this in one take as well. Excellent work!

I liked your practical oscillator example.

Your videos should be part of every theory lesson in schools and colleges. It is fine to explain it on a chalkboard but to actually see it on test equipment makes the theory sooo much readily understandable. I'm a visual learner as are many others, wish the internet and instructor/techs like you were around 40 odd years ago when I was desperately trying to learn this stuff...BRAVO ZULU

The bead on the base demonstration was almost magical. Great demo.

Great video!

Excellent tutorial. You packed more useful info in a few minutes than hours of dry text from the library. Many thanks.

Great video...I always enjoy the way you explain things in such a simple manner...

This was the most informative and actually answered the questions I've had for years! Massive kudos w2aew!

Excellent! Covered so much in a small Video... A must watch for all electronics related engineers. Thanks for a great refresher course.

good info. I always wondered how effective those ferrite cores were and if they did anything. Thanks for clarifying!

Thank you for another one of your excellent teaching moments. You are blessed with the ability to say just what needs to be said, no more, no less.

Thanks again for your great videos! You are an excellent teacher and I for one very much appreciate you taking the time to make each one of your video lessons with such great demonstrations, examples, and experiments to help convey the concepts you are teaching!

Your channel is high quality , very interesting channel , it is a must have channel for any electronics person / engineer . I wish i had more time to see all of them several times over .

This is the best primer on ferrites I have ever seen. I really appreciate your videos.

This is the best video I've seen on ferrites and how effective they can be.. excellent.

I've used ferrites on occasion, but I never realized just how much loss they could create. There you go again teaching something I didn't know! :) Great Job! RW

Alan, your videos are a must for everyone involved in electronic engineering. Thanks a lot

Thank you for posting this excellent video! It has helped me to understand (on a QUALITATIVE basis) exactly how ferrite beads work. Though I am currently interested in filtering out barely-AUDIBLE-frequency noise (in the 10 KHz to 20 KHz range), I am now prepared to do some trial-and-error testing with different split ferrite beads, installed on both the power cord and audio signal cables of our A/V system. Thanks again!

Excellent coverage. Hams (W2AEW) often have extensive, job related, knowledge and experience to share. I suspect that's the case here. Thanks, AA4BQ.

Thank you sir, this solves a few problems I've been fighting. You have an outstanding way of explaining things.

Best ferrite bead video I've found! I'm an engineer trying to get up to speed to help solve a signal noise problem with equipment at work. Thanks for the great info!

I have used these ferrite beades before and i have known that they do sth by frequencies but i have not seen their waves on the oscilloscope,now i have beter veiw,how a great video was that🙏🙏🙏

This is great. I loved the cross referencing to the 'scope. One area where it does get confusing is the use of various mixes dependent upon the application: use as a choke against use as a transformer. This leads to folks arguing at cross purposes on forums and elsewhere about which mix to use. A mix that works as an RF choke at a given frequency will most likely not be a suitable mix for a transformer at the same frequency for obvious reasons when you stop to think about it. I do enjoy your videos Sir.

The demonstration for suppressing a parasitic oscillation was brilliant!

Enjoying watching your videos, brings back memory's of being a TV engineer dealing with rf, if, pll, and singing ferrite beads in the line stages driving the customer dogs mad.

"thank you for this" its always better when an there's a coherent instructor explaining a thing for me sometimes the concepts don't leap off the page for me on top of the fact i don't speak electrical engineer so again thank you.

This video has earned yourself a subscriber sir. Very well done.

Thank you very much for your excellent explanations about ferrite beads. The clearest explanations! Thank you!

Excellent video Sir. You and thesignalpath are prob my favorite posters of educational info here. Thanks for sharing with us your knowledge, i look forward to more of your content.

Good explanation, thank you. You sound like a good analog engineer.

This channel is GOLD MINE and the videos are Nuggets.

Absolutely perfect presentation. So clearly explained and demonstrated.

Other online sources only gave me some vague description of these mystery components but your demonstration made things very clear for me!

Nice video, straigh to the point ! More intuitive than hundred pages of unreadables applications notes... Nice Job;thank you

I had an idea what those beads around transistor legs were for, but so good to see a demonstration. Thanks

Thanks👍 very well planned and executed run through of the basics (which is exactly what I needed)

Thanks for the wonderful & practical explanation, of the usage of the Ferrite Beads.

Excellent presentation visuals are worth a thousand words ..

Fantastic video! Thank you very much for taking the time to post this video.

You earned my subscription. Very basic but a good refresher!

Love the analog scopes mmmk, love the frequency response mmmk, superb content Mackey!

I needed a refreshing about ferrite beads, you've done and excellent job, thank you.

Superb video. Very well prepared, I loved all the practical examples.

I know this vid is old, but gold ! clear demontrations, didn´t know osilators have oscilatotions on the base, I thought it only happened on tube circuits where the cheap and effective solution is a grid stopper resistor, most tubes where deigned for high frec. did´t know that bipolar transistor suffered the same issue. Now I know thanks to you! In fact 2N2222 is a high bandwith transistor (relative to say a BC548).

Very, very well done vid with clear/concise info/presentation. Job well done Sir.......

Truly informative. Well done. I understand much more about ferrite beads ! Thank You !

A day where you learn something new is a good day. Thanks for making it a good day for me :-)

I was right as my guess it was some kind of filter. I asked Best Buy and Office Depot and no one knew. Your explanation is very good. I am trying to find the same length power supply cord for my adventure cam without the ferrite bead on it. The cord came with a ten year old Cannon camera but works on my Ultra Pro X 10. The length is 18". My next step is to try Radio Shack for the cord I need. Subbed and liked.

That was a great and informative explanations on Ferrite beads! Thank you

Very good, you are very clear to explain, despite of my bad english you are a good teacher, thank you very much!!!

Great stuff, always learning something new from your channel!

I always wondered how effective those filter beads were. Many products have those inside and I always ask myself "how much are these tiny ferrite beads going to help"... Thank you for showing us and making it clear! :)

Just watched Dave's common mode noise video. Perfect timing :)

Great, very clear to understand and fun with examples.

Great Video! Thank you for all your hard work.

Really good video well explained I like the practicle demonstrations really help get to grips with the information

I always thought that ferrite beads were electrically conductive. When I saw you put that bead directly on the lead I was sure a short was imminent:)). Thanks, opened my eyes and put ferrite beads on mosfet gates on my current project working at 300v, very clean switching right now. (Also added capacitors very close to the half bridge).

Excellent tutorial and demonstration. 👍👍👍

Finally ,It all makes sense now! Thank you!👍

Great .. The contents and Practical examples were good .

Cool...really enjoyed your explanation on this subject.

I worked as an engineering technician for a large op amp maker 45 years ago and we were always looking to increase the bandwidth of our opamps and multipliers. These were discreet devices that were about 1-1/2" square and had 7 to 9 pins on the base (I still have a few in my parts bins). The circuitry was on small printed circuit cards, these were put into a potting shell and then filled with epoxy. A cheap way to increase the bandwidth was to slide a small ferrite bead over the output pin -worked every time.

Excellent demonstration. Thanks.

Once again a very instructive video. Thank you.

your 10 min videos are like summary of 1hour engineering class, but better and enjoyable.

... and you have another subscriber. Great video and thanks for showing demos on the 'scope. I've been looking for a good video on ferrites and I believe I found it.

Thank you for this excellent 10 minutes (11:51 actually) of video that teaches a lot.

Very well explained Alan. I have a topic suggestion - back to basics video on filters. Something that shows multiple order passive/active filters and their performance. Thanks for making these wonderful videos.

Excellent! Another lesson well learned. Thank you.

Indeed very well demonstrated, these filters and suppression of unwanted frequencies both within circuits and power supplies as these can directly affect other sensitive electronic equipment through power lines or other interconnections as well as radiate electromagnetic radiation as radio frequency interference, (RFI) so today you would not be able to market any product unless you meet all RFI regulation under the EMC rules, and only then you could place any product on the market and obtain a CE marking requirement.

So awesome seeing this man!!

thank you for taking the time and sharing your knowledge....it is well appreciated!!!

Good video, you are a great speaker!

Excellent vid on ferrite beads, enjoyed it.

Always love your videos...never a dull moment.

That's a really cool demonstration on ferrite beads

Very helpful. Thank you! I'm planning on doing a CNC plasma later this year and the KZfaq algorithm sent me here.

Thank you for this, gave me lots of ideas to try! 👍

I really enjoyed this. really good intro for me

I like your informative video. I never suspected that a simple PSO would break into oscillation at 200 MHz. I've built quite a few, but even if they did oscillate, my 20 MHz scope would never know it. Thanks.

I really appreciate your very informative tutorial videos! I'm learning a lot from you! Thanks again! :-)

You are awesome, Thanks so much for taking the time to explain this stuff! -Subscribed

Great video, learned something new

I understand the principle of why it works... didn't realize it could have that magnitude of affect on at higher frequency. My question, how do you determine when you need to use this filter? What would be some symptoms? This question stemming from the fact that all of the computer related cables have them. AWESOME video!

Hi, thanks a lota for many & many hours on your channel, for sure i will spend in the next future. great way to explain this things. see you soon. D

Very well done and answered a lot of questions

That is a really great explanation and demo, thank you

Thanks. Very good presentation and very useful demo.

Excellent. Very good information. Thanks much.

congratulations! You have a new subscriber

Really like these videos. What i like the most is the comments from guys that feel they have to mention that they themselves are engineers or graduates of M I T . The only thing that they engineer is a burger onto a bun at the golden arches for an 8 hour shift. Nevertheless....good video Thanks

Nice to see it visually

awesome explanation and examples!

Very nice video. Once again a super job in using instrumentation to explain and show the behavior. I wish the ARRL Handbook has such videos embedded in the pdf versions!! Dave, AA6RE

Great demonstration. I subscribed : )

Thank you for sharing your knowledge. I was reading through the manual for a new video camera I had bought, and it mentioned this thing I'd never encountered before, that snaps around the power supply cable. Of course my curiosity was piqued, so I had to find out more. Thanks to your video, it all makes perfect sense: suppression of high frequency electromagnetic radiation, by encouraging lossy inductance. My questions is: is this to protect the camera itself or is it just bundled in to comply with regulations to prevent other devices from picking up interference? Is the operation of the camera likely to be affected if I don't bother putting it on? The cord is supposed to be wrapped around the bead (in parallel) so that the cord passes through the middle part twice. The design of the supplied bead is such that it is a very tight fit and I am concerned that I will damage the insulation of the cord if I were to clamp it shut. If I simply left it off, what's the worst that could happen? (I would be filming on battery power 99% of the time anyway. Very seldom using the power cord while filming. Only there for charging the batteries.) Thanks again for the clear explanation.

Another excellent video!!! Thanks

Perfect tutorial,thanks!

As a former Instrumentation Technician, we usually get deliveries of industrial instruments with those things loosely bouncing inside the box. I usually pick it up and turn it this way and that not knowing what those darns are for. Now I know. Thanks.