This video is excellent. That is the first time in my life that I have ever heard a satisfactory explanation of the difference between resistance and impedance. Thank you so much. I'm learning so much about valve amplifiers just from watching your videos. I'm very grateful that you have taken the time, care, and planning to share your knowledge with us.

@CKDz

3 жыл бұрын

Two important points to make: 1. It is important to note that the 1.25 is a rule of thumb which is valid ONLY for the range of frequencies for audio. This difference is a function of the AC frequency, so it's not always true when dealing with radio or other ranges of AC. For more info see: www.electronics-tutorials.ws/accircuits/ac-inductance.html 2. Reactance in AC circuits comes in two flavors: Inductive Reactance which affects the changing electrical CURRENT in an AC circuit, (which Uncle Doug outlines on this video), but there is also Capacitive Reactance in an AC circuit (which Uncle Doug discusses on a different video), it affects the changing A/C VOLTAGE in the circuit: electricalacademia.com/basic-electrical/capacitive-reactance-ac-circuit/

You are 120% better at teaching than any of my EE professors. A+

@UncleDoug

3 жыл бұрын

Wow.....thanks so much, TL.

I have to say, Uncle Doug, you are one of, if not the best, teacher I have ever encountered. Your explanations and accompanying diagrams are phenomenal. Thank you so much for all that you do. And please thank Rusty for teaching all of this to you. 👍🏻

@UncleDoug

3 жыл бұрын

Wow, thanks, KK. Please continue to enjoy all our videos. I will ;)

Uncle Doug, you are a national treasure. Thank you!

@UncleDoug

5 жыл бұрын

You are so kind to say so, Gary. Thanks !!!

@frank-ts1yr

3 жыл бұрын

I second that

@jaycee30865

3 жыл бұрын

He is telling truth.

@muesli4597

3 жыл бұрын

I’d only add, International treasure.

@faizalmansaralam4229

Жыл бұрын

I second that 😊

I'm retired Industrial electrician and a ham radio operator for 40 Yrs but I learn something every time I watch your videos. In a word, they are brilliant. Many thanks.

@UncleDoug

2 жыл бұрын

Thanks so much, Bob. So glad to hear it.

You explain things well enough that I (a math zero) have a chance, if I watch this over and over, of getting THE MATH! Thanks for your patience!

@UncleDoug

5 жыл бұрын

You're welcome, NYS. Thanks for watching :)

This presentation is absolutely phenomenal. Simple, elegant, best verbal delivery to encourage learning and retention.

@UncleDoug

Жыл бұрын

Wow, thanks so much, Ronald :)

Very good video. I have only one criticism: Please do not apologize for the use of math nor for getting into the numbers involved in calculating these concepts. That is exactly what's wrong with our generation is that people have become afraid of (or at least disinterested in) anything that requires exertion of mental capacity. If someone wishes to become good at audio electronics engineering, they'd better get over any aversion they may have of numbers. So sincerely, please do not apologize.

@UncleDoug

9 жыл бұрын

***** Thanks, Jim. I taught math and science for many years, and agree with you completely. I "apologize" partially in jest and partially as a challenge....that must be met, if one is ever to develop a reasonable level of competency with electronic circuits. Thanks for your input.

@Ronnie631000

9 жыл бұрын

***** You are so right!

@merijn0301

7 жыл бұрын

I agree. And, come on : It's not rocket-science, jiggling a bit with ratios. My opinion is that when you want to be a tech in this field, Ohm's laws must be second nature.

@silasfatchett5693

7 жыл бұрын

Merjin van Schaik - agreed 100%.

@zuheyr1

6 жыл бұрын

Certainly illiterate people would not be watching this,..

I have just found your channel in 2021 and I am having a great time going through the catalog. I have learned a lot and have had it on in the background of the shop for the past week. You are a great teacher!

@UncleDoug

3 жыл бұрын

Thanks so much, Matthew. Welcome to our channel :)

Your videos are so important for future, and us current, generations. This is invaluable information! Thanks Uncle Doug.

@UncleDoug

8 жыл бұрын

+Fuga Mante You're welcome, FM. It's great to hear that the videos are helpful and appreciated :)

@marklowe7431

4 жыл бұрын

So true. Valves are not going away anytime soon.

Thank you Uncle Doug! I wish we had more teachers like you around.

@UncleDoug

Ай бұрын

You're welcome, PMM.

WOW! Uncle Doug is the best teacher. Simply the best explanation of resistance and impedance. Wish I had found him a long time ago. Thanks.

@UncleDoug

3 жыл бұрын

Thanks so much, Red. We're glad you did find us :)

I really appreciate you doing this. I'm watching and doing my best to take in bits in hopes that one day it will all come together and I can say, "Yes, I can build an amp. A dual 6L6'er."

@UncleDoug

10 жыл бұрын

You're welcome, Grady. For your first project, you might want to try a single-ended 6V6 amp, like the venerable Champ. You can learn all the basics without a lot of complexity and expense....and then move on to more challenging circuits. No matter what, best of luck !!!

Such a well explained article for electronic starters

@UncleDoug

9 жыл бұрын

Thanks, Graham. Glad you liked it. Please note that I have about 110 other videos that you (hopefully) may find equally interesting :)

@das250250

7 жыл бұрын

Uncle Doug As valves were before my teenage life I watch quite a few videos of yours and sometimes several times over a period until some points become understood. I believe your videos to be some of the best and practical tube and electronics tutorials.

Thank you Uncle Doug. Your video's are always enlightening.

Uncle Doug, your contributions to KZread are priceless. Thank you!

@UncleDoug

4 жыл бұрын

You're quite welcome DW. Thanks !!!

What a gold mine of information ♥️♥️♥️♥️

@UncleDoug

4 жыл бұрын

Glad it was helpful, Charles :)

Excellent explanation!

@UncleDoug

6 жыл бұрын

Thanks, AB :)

This video was extremely helpful - Great Job and thank you so much for the effort and time you put into these video's. I've been studying tube amp circuitry for the past year and the fog is finally starting to lift!

@UncleDoug

8 жыл бұрын

+Kevin King You're welcome, Kevin. I'm glad to hear the video was helpful :)

Reactance + Resistance = Impedance. It's now so simple! Thanks so much Uncle Doug! I already knew about the winding ratio but finally I now understand impedance. Wonderful :)

Can you make your next video on the mains/power transformer please ?? You are the man!! I love all your videos !!

Thank you. Very generous of you to share your knowledge sir.

A simple yet complete explanation of what could be a confusing topic! You're a gifted teacher Uncle Doug.

@UncleDoug

6 жыл бұрын

Thanks so much, Aurora. Thanks for watching.

I am SO glad I watched this series of videos! You have explained Impedance in a manner that I actually understand. Thank you!!

@UncleDoug

5 жыл бұрын

You're welcome, M47. Please watch our other videos for even more insights :)

An excellent transformer treatise. Thank you.

@UncleDoug

10 жыл бұрын

I'm glad you liked it, Andrew :)

Uncle Doug you did a nice job covering this topic. There is one other small point that I have never heard anyone mention concerning the speaker impedance and that is this. While the voice coil is the main element involved in the speaker impedance we forget that this coil of wire in also located in a magnetic field. The location of this coil makes for a totally different circuit than if it were just an air coil as the inductance changes. This may explain why some guitar players say they like the sound of certain magnets in their speaker as well as a certain type magnets in the guitar pickups. Since the magnet type can change the sound of something do to the metals used in the magnets and the magnetic energy of the magnets. This could be something you may want to think about doing a video on. Since the magnet type can change the sound of something do to the metals used in the magnets and the magnetic energy of the magnets. Thanks.

@UncleDoug

7 жыл бұрын

This is an interesting concept, Neutro, and one that I have never considered. I will do some more study on this topic.

This is the best video tutorial on OT's I have ever seen. Thank you for this uncle DOUG!

@UncleDoug

10 жыл бұрын

Thanks, TB01. Hearing from satisfied viewers makes it all worth while. I may indeed make a video about the power transformer. One characteristic of it that some people might not realize is the current limitation on each winding. Ignoring this can lead to all sorts of problems. Thanks for the suggestion.

Wonderful video! Not only does a great job of discussing the basics of output transformers, Doug also clears up the confusion for me regarding resistance vs. impedance. Thanks Doug!

@UncleDoug

4 жыл бұрын

You're welcome, Tim.

Thanks for the lesson. Learned this stuff over 40 years ago, but forgot a lot of it. Btw...don't see em a lot with todays fancy digital meters, but I love the old Simpson 260 meters. Tough as nails and last forever! There's just something better to me to watch the needle than a bunch of numbers. Guess I'm old fashioned! And gettin old too! Lol☺

@UncleDoug

6 жыл бұрын

I agree, 74. Analog meters are way better at checking potentiometers.....you can actually watch the smoothness of response throughout their rotation.

@74dartman13

6 жыл бұрын

Uncle Doug yep!☺

@74dartman13

6 жыл бұрын

Greg Clemen yep...you described me perfectly. Hope I always stay young at heart!

@74dartman13

6 жыл бұрын

Greg Clemen that's for sure! This morning my body feels 90 but my heart and mind...20!

@74dartman13

6 жыл бұрын

Greg Clemen the "Golden Years" suck! I'm confused all the time! I can't figure out which part of me hurts the worst!

This lesson is pure gold! Thank you Uncle Doug!

@UncleDoug

9 жыл бұрын

You're quite welcome, Watson, and thanks for your kind words. Rusty and I are glad you enjoy our videos :) ^. .^

Thank you. I have never been able to get an explanation to so many questions in such a great way. I so much appreciate your time and knowledge.

@UncleDoug

4 жыл бұрын

It's our pleasure, Todd. Thanks for watching.

Thank you so much for shedding light on an area that as a musician and collector of old amps I am interested in but have always been shy of investigating. Very clear delivery.

@UncleDoug

8 жыл бұрын

+Colms2005 Thanks, Colms. Rusty and I are glad the videos are clear and helpful :)

This was the most informative‌, most right to the point, and most useful video on the topic! Not only you covered the theoretical aspects (which I came for) but it also showed practical aspects (which were bonus for me). I cannot thank you enough! Really!

@UncleDoug

5 жыл бұрын

You're quite welcome, OD. Thanks for your very nice comments :)

Just watched this video and I have got to say, you explain this with fantastic clarity. It has been a pleasure to watch, thank you.

@UncleDoug

7 жыл бұрын

You're welcome, Mr. T. We're glad the video was helpful.

You are a gifted teacher, Doug.

@UncleDoug

4 жыл бұрын

Thanks, MC.

Thank you for such an illuminating video! You have a great talent for passing on technical information in an accessable yet scientifically rigorous way. Many thanks 😊

@UncleDoug

3 жыл бұрын

You're quite welcome, MSF. Thanks !!

Your teachings are some of the best on KZread. I greatly appreciate the time it takes to put together these videos. The more of these educational videos you make the better off we all are. Thank you so very much I know how time, effort, and energy it takes to put these together. With appreciation...

@UncleDoug

3 жыл бұрын

You are quite welcome, SP. We "appreciate your appreciation" of our efforts and thank you for your kind comments.

Uncle Doug, thank you SO MUCH for sharing your knowledge! I know I have said it before but, you have no idea how much you have helped me. AND, I am VERY MUCH enjoying my new hobby of working on tube Amplifiers!

@UncleDoug

4 жыл бұрын

That's great news, DW. I hope you continue to enjoy and hopefully profit from your new hobby.

Hi Doug and Rusty; Thank You for Your Patience with me.. And Thank You for Your Great Answer.. A little while ago I found Dennis Carter, and His Video's give me, even more of what I am looking for.. Not so much in Output Transformers, but the Rest of the Set, which is even more of where I need Help... The Front end is where I am having the most trouble, and the Questions I have asked You was to complete what I needed to know for the Amplifier or Back End.. Thank You for doing such a Great Job !! THANK YOU Marty

Love this video explaining the impedance Z (Xl) and ohms... great technical information you have broken down into terms that most can understand.

@UncleDoug

2 жыл бұрын

Thanks, Vic. Glad to hear it :)

You, sir, are a gifted teacher

@UncleDoug

3 ай бұрын

Thanks, ST :)

Besides the perfect approach to the matter, being me italian, I do appreciate your always perfect and easy to understand english! Thank you very much!

@UncleDoug

3 ай бұрын

You're quite welcome, LLT. Glad to hear it :)

It's Amazing how smart you are Uncle Doug. God Bless you and your Family.

@UncleDoug

3 жыл бұрын

You're too kind, John. If I can do this, so can anyone who really focuses on learning about tube electronics.

Thanks for the kindness in sharing this!

@UncleDoug

7 жыл бұрын

You're welcome, Javi.

Uncle Doug, you are a INTERnational treasure. Thank you!

@UncleDoug

3 жыл бұрын

Wow, thanks so much, ZH :)

I am new to your channel and am very glad that I found you because nobody else is teaching this stuff and certainly not in the down-to-earth manner that you do which makes it very easy to understand and digest! Thank you for the excellent education!

@UncleDoug

2 жыл бұрын

You're welcome, Robert. We're glad you found us :)

The best explanation about speakers and impedance, ever!

@UncleDoug

4 жыл бұрын

Wow.....thanks so much, Alvaro.

Love, love, love your work and teachings... I have a few friends struggling to understand electronics, I am sharing this video (among several others) to help them with the heavy lifting, falling so far out of audio'fool'dom. Doug you are a master teacher... Thank you for the effort!!!

@UncleDoug

3 жыл бұрын

You're quite welcome, QE. I'm glad the videos helpful :)

The best explanation ever about the difference between resistance and impedance on KZread.

@UncleDoug

4 жыл бұрын

Thanks so much, Alvaro :)

You did an excellent job.

You are an excellent teacher, thanks so much for all of these KZreads.

@UncleDoug

2 жыл бұрын

You're welcome, Polly. Glad you enjoy them.

You are a great teacher. You make things very easy to understand and enjoyable.

@UncleDoug

9 жыл бұрын

Thanks so much, Brock. I really appreciate your kind assessment :)

Excellent video Uncle Doug! If only all teachers were as clear and thorough as you.

@UncleDoug

6 жыл бұрын

Thanks so much, Bo :)

I wish you'd been my electronics lecturer, "back in the day". You have the knack of taking a complicated subject and making it seem simple, enjoyable and intuitive. Come over to Australia and let's build an amp together!

@UncleDoug

6 жыл бұрын

Thanks so much, Ian. Rusty always wanted to visit his homeland, but I guess he won't make it. Maybe Jack and I will come instead :)

I am getting a better understanding of how amps work than I had just a month ago. You opened up a huge door into tube electronics for me. Don't let the hot rods distract you!

@UncleDoug

3 жыл бұрын

That's good to hear, MR :)

This video is just great! I wasn't expecting you to go into the Resistance vs Impedance, so that was a lovely surprise as I was needing to study up on this. Thanks again!

@UncleDoug

6 жыл бұрын

You're welcome, Garrett. We're glad the video was helpful :)

Thanks for another jewel of a video!

WOW Such a great explanation and the math wasn't too hard to comprehend either. Thanks so much for this. This video gets saved straight to the reference library of other useful videos on Valve Amplification

@UncleDoug

2 жыл бұрын

Glad you liked it, UT.

Finally, someone who knows how to teach! I have never found a better explanation of tube and transformer characteristics and there application than this. Thank you! new subscriber

@UncleDoug

3 жыл бұрын

Welcome aboard, Darin. Thanks for the very nice comments :)

A first rate presentation. Thanks Uncle Doug!

@UncleDoug

9 жыл бұрын

Bill Norman You're welcome, Bill. Glad you enjoyed it :)

Great lesson. The impedance of your teaching was a perfect match to my brain.........

@UncleDoug

4 жыл бұрын

Well said, Mark. You have obviously been paying attention :)

Thank you for posting this video. You explanation about impedance reflection really helped, as this has been a stumbling block for me. You make it easy to understand. Looking forward to more of your videos

@UncleDoug

7 жыл бұрын

You're welcome, Ernest. We're glad to hear that the video was clear and helpful.

Brilliant explanation Uncle Doug. Very well done.

@UncleDoug

6 жыл бұрын

Thanks so much, John. Thanks for watching :)

Excellent video Sir. Thank you.

I highly appreciate any of your KZread Land videos. So much to learn and allways using the correct terms. Makes it so much easier to understand. What I want to say is that using the right terms is ways much more better than prattling about which is so often seen on other channels. Like the car's stuff too.

@UncleDoug

5 жыл бұрын

Thanks, MM. We try to make every video as clear and concise as possible.

I feel smarter after I watch your videos. Thanks uncle Doug

@UncleDoug

3 жыл бұрын

Glad to hear it, Johny. The pleasure is ours :)

What a FANTASTIC video! Thank you!

@UncleDoug

2 ай бұрын

You're welcome, Wil.

You are an excellent teacher providing a valuable resource. Keep up the good work.

@UncleDoug

10 жыл бұрын

Thanks, Fak. I'm glad the videos are helpful :)

thanks for your time and passion just got my first Princeton RI

@UncleDoug

10 жыл бұрын

You're welcome :) Congratulations on your new acquisition......it is one of my all-time favorite amps !!

Thank you so much for that Doug that clears that up so well for me and provides the formulars. I always wondered what the difference was between Resistance and Impedance.

@UncleDoug

8 жыл бұрын

+david dkeole You're welcome, David. I'm glad the video was helpful :)

Again I have learned things I wanted to know for a long time. Some fifty years ago I built simple tube radios with only a wiring diagram. It worked well, but I did not understand everything. Now it getting clear, thanks to you, Uncle Doug.

@UncleDoug

9 жыл бұрын

Hennie Korf You're welcome, Hennie. Glad the video was helpful and informative.

Thanks Doug for a very clear explanation. I looked for this type of clarification elsewhere and couldn't find it. I was amazed however by how willing people are( who had no idea what there talking about) to explain it.

@UncleDoug

6 ай бұрын

You're welcome......glad you enjoyed the video. The internet is "blessed" with all sorts of self-proclaimed experts. The trick is to separate them from those who actually are.

These are great video's, thanks for them. I'm a retired Electrical Engineer who's hobby is guitars and old amplifiers. I find your video's informative and fun.

@UncleDoug

4 жыл бұрын

That's great to hear, Mack. We really appreciate it :)

Hay Uncle Doug! You have really helped me remember my electronics coarse in High school. mid.70's. we had a great teacher who was a radar tech in the 2nd. WW. he really tried hard to help us understand all this amazing stuff. Its been many years since i felt such a strong disire to dive in to this amazing stuff again. But i plan on finding some time soon. Your a very good teach! Blessings

@UncleDoug

6 жыл бұрын

Thanks, Barry. We're glad the videos have rekindled your interest in electronics :)

This was a very informative and useful video and I applaud your teaching expertise and am happy to have found you and your extra care in explaining the concepts involved.

@UncleDoug

6 жыл бұрын

Thanks so much, Jeff. Welcome to our channel :)

I love these videos Doug! Great setup too!

@UncleDoug

7 жыл бұрын

Thanks, Christopher :)

Man thank you so much, im very much a beginner to amp repair and electronic engineering and you make everything as clear as crystal. Im learnin a lot hope to get my hands on an amp soon :)

@UncleDoug

3 жыл бұрын

Glad to hear it, NO. Best of luck with your projects.

This channel is beyond incredible. I took my fair share of EE classes in college as a computer engineer, but never before has someone been able to truly explain what these terms are, and especially well by explaining why they are named as such! Amazing job. I just watched your video on the 5F1 yesterday for the first time as I'd been looking for an in-depth component by component breakdown of how that circuit works, and no one yet has described it better. What an awesome teacher you really are. Thanks Doug.

@UncleDoug

3 жыл бұрын

Wow, thank you so much, M. We're really glad to hear that our videos were helpful.

The best information on the net about XL and transformers.

@UncleDoug

Жыл бұрын

Thanks, CH :)

Thank you for the explanations.

Awesome videos and explanations as usual. Thanks Doug!

@UncleDoug

10 жыл бұрын

Thanks, David. Today I will upload the sequel: Power Transformers. I hope you like it :))

What a spectacularly amazing video lecture. This is a must-watch for anyone from an audio & DIY enthusiast all the way down to high school and college level students who are studying electronics. All in all a fantastic watch!

@UncleDoug

5 жыл бұрын

Wow.....thanks so much, Aaron. Please be sure to watch our many other technical videos.

@aaronmathias6739

5 жыл бұрын

@@UncleDoug The pleasure is all mine in subscribing to your channel, mate! I truly wish you were my professor in college.

@UncleDoug

5 жыл бұрын

Thanks so much for subscribing. I hope you find the videos to be rewarding and informative.

You are an amazing teacher.

@UncleDoug

4 жыл бұрын

Thanks, Jeff :)

Great straight-forward information..the math is necessary for anyone entering the field of electronics....just gotta suck it up and get used to it! Go Uncle Doug..I'm loving it!

@UncleDoug

4 жыл бұрын

Thanks so much, FBH :)

I wanted to understand a bit more about guitar amps. Thank you for your videos! I thoroughly enjoy them.

@UncleDoug

9 жыл бұрын

Geza Turi You're welcome, Geza. Rusty and I are glad you enjoy the videos. Thanks for watching :)

Sir, I must declare you a living miracle-worker! You have actually managed to convey knowledge into my logic center which had previously been quite indecipherable!! Thats amazing! This is a great great vid thank you so much!

@UncleDoug

5 ай бұрын

You're welcome, C. Glad the video was informative :)

Extraordinario,excelente! Gracias a usted por su sabiduria! Good luck!

@UncleDoug

4 жыл бұрын

Thanks so much, Francisco. Best of luck to you.

We All Appreciate you Uncle Doug !!! Thanks . . . I'll keep watching !

@UncleDoug

2 жыл бұрын

That's great to hear, RD. Thanks :)

You are a very good teacher. In the last 3 hrs, minus time away, I learned so much about a subject that was BORING in HS and college plus solid state was the latest thing (if it ain't broke don't fix it!)

@UncleDoug

6 жыл бұрын

Thanks, WS. I'm glad the videos are informative :)

Thanks' Uncle Doug.I was watching your videos' a few years' back, then stuff came up and I am now getting back to them!Really informative and some info that I wish I had,some years' ago.I hand-wound an output-transformer for a prototype amplifier that a friend of mine was building and we were doing a lot of guess-work,at the time!This explanation video helps' so many people to understand the "black-art" part of tube electronics'!Thanks' again for your generous offerings' and sharing your incredible knowledge with us!

@UncleDoug

5 жыл бұрын

You're welcome, Charles. Another output transformer video is on the way.

@charlesmatthias9459

5 жыл бұрын

@@UncleDoug Thanks' Uncle Doug,will be looking forward to seeing that video!

At 65, I am finally taking time to relearn what electronics I learned in grade 13 which was mostly tube circuits. Having forgotten most of that, it is a real pleasure to study with you. My interest is Stereo tube amps and they are so much like guitar amps that your teaching is right on. THANKS

@UncleDoug

3 жыл бұрын

You're quite welcome, OEC. Best of luck with your self-education.

Such a great review of guitar amp transformers and basic electronics. Very clear examples. A great video for beginner amp builders.

@UncleDoug

Жыл бұрын

Thanks, PCM :)

Wow Doug, thanks for so much for your helpful videos. I still have a lot of re-watching to do b/c it's a lot of info but I know a lot more now than I ever did! Thanks!

@UncleDoug

9 жыл бұрын

You're welcome, Leif. It's great to hear that the videos are helpful :) Thanks for watching.

Hey Uncle Doug. I am finally getting around to learning tube amps. I just want you to know that you are an amazing teacher. I am a HVAC tech and have an understanding of basic electricity and you explain things in a manner waaaay better than any tech school teacher ever did. I am not sure if you are still making videos or not not, but please keep it up if you are. Thank you thank you thank you! Ryan Wham

@UncleDoug

6 жыл бұрын

You're welcome, Ryan. Thanks so much for your nice comments, and best of luck with your new hobby :)

all the years of using my Marshall major and my other tube amplifiers I never had the idea of why these negativities could happen here's why in the way you just explained it 🙏

@UncleDoug

4 жыл бұрын

Glad the video was helpful, Charles.

@charleslambiase5670

4 жыл бұрын

@@UncleDoug thank you Uncle Doug 💜

Great videos! Thanks for taking the time to explain these concepts!!

@UncleDoug

3 жыл бұрын

It's a pleasure, Mike. Thanks !!

Excellent. A very good and thorough explanation.

@UncleDoug

6 жыл бұрын

Thanks, Michael :)

Without doubt ,this is the best way to learn about circuits. I'll be back here a few times yet. Well done. ( Subscriber )

@UncleDoug

4 жыл бұрын

Thanks so much, W. We look forward to hearing from you.

Wonderful job! Very easy to learn from this video. Thank you.

@UncleDoug

11 ай бұрын

You're welcome :)

Another stellar video!

@UncleDoug

5 жыл бұрын

Thanks, Michael.