How Tube Amplifiers Work, Part 1: The Power Supply
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- Опубликовано: 13 мар 2014
- Part 1 of a 2-part video series in which the circuitry of tube amplifiers is explained by breaking down the circuit of a Fender Champ amplifier into sub-units and explaining the design and function of each....in a conversational, rather than purely technical, way. This video covers the Primary (120V 60cps) circuit, the 5V and 6V circuits, the High Voltage circuit, and the general rules that govern the behavior of AC and DC in amp circuits. Additional topics such as transformer winding ratios and the function of vacuum tube (filament) heaters, cathodes, and plates are also explained.
NOTE: There are two ways to look at an amp circuit, based on where the electrons are.....and where they aren't. "Charge" is based on this. Where the electrons ARE is "negative", and where they AREN'T is "positive". In effect, the power supply is an electron pump. It pumps all the electrons out of the circuit and into the chassis, so the circuit (i.e. tube plates) have a positive charge and the chassis is negative. At this point you could say that the circuit has a charge of +325V compared to the chassis at 0V, or that the chassis has a net charge of -325V compared to the circuit at 0V. One or the other. It is the accepted standard, however, to say that the circuit is +325V compared to the chassis, which is at 0V.
My diagram was meant to convey this, but ended up being confusing for many people. Hopefully, the explanation above makes sense. If not, here is an analogy: If you drive 50 miles away from home, there are two ways of describing your position: You are either 50 miles from home, or home is 50 miles from you. One or the other. You can't add the distances and say you are 100 miles apart. Either you or home have to be set at zero distance.
PLEASE NOTE: I have made some changes to this video to update it's accuracy and improve the content. Whenever the notes contradict the narrative, especially during the rectifier portion, please heed the notes.
ALSO: I have since released an updated and much more comprehensive video describing this topic. Here is the link: • Power Supplies Part 2:...
If you enjoy videos that feature classic vintage tube amps, jukeboxes, weird electro-mechanical devices, and home-built electronics projects, then please subscribe to my channel. You will gain immediate access to 200+ videos, and (if you activate the service) you will be notified each time a new video is posted. You can also become a Patreon patron at: / uncledougsvintageamps or make a PayPal donation to: dldcam@aol.com . Thanks for watching !!!
Link to Part 2: • How Tube Amplifiers Wo... 
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I was a US Navy Tradevman (Training Devicesman) from 1965 to 1969 and attended almost a full year of electronics training to qualify for my rating. This is, by far, the BEST explanation of vacuum tube theory I have ever seen, anywhere! Kudos for your insightful and fascinating work!
Wow......high praise indeed. Thanks so much, Joel :)
I cannot overstate what a tremendous asset you are to the RUclips, amplifier, guitar and electronics community. If only my science teachers in school were 1/2 as good at explaining this as you are. And if only someone who have explained it to me this way 30 years ago. Very grateful for you!
Thanks for your kind words, Jason :)
I can't but agree 150%.
I have looked for a presentation that teaches me a foundational understanding about tubed amplifier theory. I am a teacher who has had to deal with dyslexia for almost 60 years and I have only known of my deficit for about 20 years. I am also a guitarist who loves tubed amps and have worked only at a rudimentary level on amplifier building and repair. Studying books on the subject is slow and helps some, but your presentation with verbal and visual cues is illuminating for me. You break down concepts (of which I have never been able to master nor gain fluency) into simple bite-sized (accessible) ideas and make them "visible" for me. That, sir, is a breakthrough I have not been able to experience on the subject. You are a rare talent and a true teacher of the sort I aspire to become! You not only teach electronics, but you also teach "teaching." You have made a difference to me. Thank you.
Wow, thanks so much, Patrick. Your very kind remarks, especially coming from another teacher, are particularly rewarding and appreciated.
Not exactly the same for me but very similar, the rudimentary building and repairing with tons of trial and error mistakes, none of which I even recall now. And thank you Uncle Doug for making this new epiphany possible. I'll be subscribing.
I agree with Patrick. I have been an electronics hobbyist for more than 30 years and have come to understand these concepts on my own, from my dad, and of course from school, but this video is the best I have ever seen and breaking down these concepts.
Bravo sir.
@@UncleDoug It is simple to say, What I am Going to Say, what i am saying (with visual demonstration), what we have learnt. (repeat as needed for each extra bit that builds on that), it is less easy to actually do that, which you do well.
Excellent!!!
Doug,
@ 16:15 of your explanation: You seem to indicate that scopeing the center tap (which is hooked directly to ground) of the transformer will show you the bottoms of the AC waveform. I guarantee that scoping anything directly hooked to ground will only show 0 VDC and 0 VAC, unless there is something seriously wrong in the circuit. If you want to see the bottoms of the waveform, scope each plate of the tube. When it is reverse biased, you will see your waveform bottoms, which the tube is conveniently blocking for you. Scopeing the filament would show the positive waveforms from both halves of the tube, but you will see that waveform smoothed by any filtering capacitors on the B+ line. So it will be more or less a high DC voltage, with some ripple. You will not see the sum of the positive voltage waveforms, the filter caps will swamp that out.
Pete
+Greg Peterson Very interesting and informative, Pete. Thanks so much for your knowledgeable input :)
To clear this up, erase the pencil mark for -325 pointing to ground & have it point to the lower transformer wire.
Greg is correct. The diode/rectifier action is like a switch, only letting the voltage flow in one direction. Basically what it's doing is turning on and off each half of the center tap coil. As the top coil voltage goes positive, the bottom coil is turned off (filtered out by the rectifier), then as the bottom coil goes positive, the top coil is turned off. So, only the positive power of each coil is allowed to pass through and the negative power of each coil is blocked or turned off.
If you look at the top coil separately you would see +325v for half the cycle, then 0v for the other half the cycle.
Looking at the bottom coil only, you would again see +325v for half the cycle, then 0v for the other half, but in opposite phase.
With both coils in action, the -325v peaks of both coils are blocked or filtered out and the +325v peaks from both coils then produce the continuous stream +325v peaks with no gaps as you show in the rectifier output.
@@montpierce424 Yes, this is spot on.
Yes, I noticed this too.
This is the best video clearly explaining not only "what", but "why" and "how" as well, as I've ever seen.
Thanks, K. We're glad you enjoyed it.
Uncle Doug your tops i echo what he said my teachers were god but not as good as you thanks
@@edwardkujawa Thanks so much, Ed :)
I wish Uncle Doug would have been one of my professors in college. His ability of explaining electrical circuit behavior surpasses many of the instructors I've dealt with. Although I am an electrical engineer now, I review these videos to solidify my knowledge by giving my brain a different viewpoint. Thanks for your work.
Wow, high praise indeed from an EE, Andrew. Thanks so much. We're quite flattered that our videos were helpful and informative. You're welcome :)
Thank you so much. This is probably the most helpful and best explained video made by an individual on any topic that I've ever seen (and I've seen a lot). I know you're probably making little to no money off of this, but this is honestly hugely appreciated.
Mark Emhoff You're quite welcome, Mark. Rusty and I are really glad to hear that the video was clear and helpful. Nice comments, like yours, are the only payment we seek or receive.
Uncle Doug =Amp God! Thankyou, I had an uncle jack who taught me basics @ 9years old +/-.
Uncle Doug is the best ain’t he
@@themongoloid8944 Yes he sure is. Wow!
I totally agree and subbed after watching only 3 minutes of this video. Thank you, Uncle Doug!
"Making the simple sound complicated is commonplace; making the complicated simple, Awesomely simple, that's creativity."
-Charles Mingus
Thanks so much, Dan. It's good to know that I'm on the right track :)
As with Charles Mingus brilliant music, after a few minutes, i have to go back to the beginning and listen again - to take it all in
Sir ! You are the absolute best electronics teacher I have had the pleasure to experience. Only a master of electronics can simplify the subject with such clarity!
Thanks so much, Mike :)
I agree. I would love to take an entire amplifier class or online lesson with you!
Wooow, hold up a second. I was taught the 120V value is the RMS voltage. And the peak voltage for this on one half of the waveform is actually 170V. If you look at it for positive and negative with respect to neutral, the voltage from an AC outlet is actually 340V peak-to-peak.
You are correct, Stephen. We cover this in detail in later, more sophisticated videos. This one is simply an introduction, for beginners.
Thank you so much for this series! I've watched and read several explanations of how tube amps work (pretty much always looking at the 5F1), and never got anywhere until I watched this. I think the difference is that all the others I've encountered focus on the signal path, and treat the power supply as an afterthought. So what I see is that the signal goes into the amplifier, and then it goes into a magical forest of tubes and capacitors and resistors, and then music (or in my case horrible noises) comes out the other end. Your videos have demystified that magical forest, and for that I thank you.
You're quite welcome, T. We're glad it was helpful.....and loved the "horrible noises" part :)
After playing with VFD displays I was recommended to watch this. Very interesting. You explain it very good. Thanks
Glad you liked it, WL.
Doug, your videos are really helping me a lot. There are some videos on RUclips that help, but your breadth of knowledge on the subject blows them away! Thanks, again!
You're quite welcome, Greg. I'm glad the videos are helpful. Rusty is quite impressed by your icon....a handsome pup indeed :) ^. .^
Very cool! As a guitarist I find this very interesting as to what is really going on in there. Electricals are quite fascinating.
Wonderful! This has taught me faster and more than many books and videos, I have tried! Thank you!
Glad to hear it, E.
@@UncleDoug You should continue teaching and explaining things!
@@sfgylk34u_57 OK, I will ;)
I've watched this channel multiple times and each time I find a Wonderfully Fascinating Teacher on this website. Uncle Doug You've out done our educational system by miles.
Uncle Doug make CD's of your video's.
Thanks so much, BM. The videos are readily available for free, so I'm not sure what void the CD's would fill.
Hi Uncle Doug, You are a phenomenal teacher. The video was very educative. Big thank you. Regards.
natsubbu Greetings, Nat. Thanks so much :) Glad you enjoyed the video.
Hi Uncle Doug, Learnt a little about this 40 years ago and now have vaporised. Thank you for your very clear description.
You're welcome, Francis.
Thanks for sharing.
Your in depth videos are a goldmine of information and I'm very grateful for your willingness to share your lifetime of knowledge to us all.
Thanks again Doug.
Paul from Australia.
You're welcome, Paul. Thanks for your very nice comments.
You are the best Doug. We are so blessed to have you for a teacher.
You are too kind, Pete. Thanks :)
This is what internet should be used for!! Sharing and learning. Excellent information, perfect structure for educative video. Uncle Doug, your and Rusty´s videos are one of the most entertaining and also informative of any video available in www. Thank you for the time you have sacrificed for educating us. This particular video has been priceless for a dummy like me.
+Ville H You're welcome, VH, and I agree completely with your first statement. I would also mention the benefits of courteous, respectful interaction between viewers and with the author of the videos, rather than the mean-spirited, childish arguments that occur way too often on YT. I sincerely appreciate your very kind comments and the time you have spent watching our videos. I'm glad they were helpful :)
Thank you Uncle Doug for all the explanations. It's easy to understand and well explaned with simple words for a non english person like me.
Merci beaucoup! ;)
i have no wants to build one or to ever repair them, However, the in-depth explanation is more than perfect and useful for other things! very very happy you made this video! Thank you !
You're welcome, Pat :)
The way you explain things is so easy to understand. Thank you so much!
Glad to hear it, Riley.
This is gold. Went to engineering school and none of the teachers could be bothered to talk triodes
Thanks, David :)
Awesome, Uncle Doug! Thanks so much. I enjoy your videos and you have really furthered my understanding.
You're welcome, Jamie. It's great to hear that the videos were helpful.
uncle doug, thank you so much... Learned and understood more in 18 minutes than 4 years of theatretech-school.... :)
+arnold planken You're welcome, Arnold. Rusty and I have posted many more instructional videos that you may also find interesting.
I've been looking for explanations for months. But I always lacked basic knowledge to really understand everything and I would get discouraged. But this is just the right thing. None are as clear as yours. Thanks Uncle Doug !
You're quite welcome, Fancois. I sometimes receive criticism for keeping my presentations so basic, but I really believe there is a big demand for educational videos that can be easily understood by those without a lot of training and experience in electronics. Thanks for your kind appraisal and best of luck :)
Uncle Doug I don't know about other people, but after understanding the fairly simple circuit of the champ, I could use a video like this to explain the circuit of the 5E3 step by step. I haven't found anyone able to explain what the "push-pull" system is about... At least no one able to explain it clearly and in simple terms like you did on that 5F1... might be an idea for a video ;) Thanks again !
You're right, Francois. I have not yet explained the output stage of double-ended amps....and it would indeed be a good topic for a video. I will give this idea some serious thought. Thanks for watching and for your excellent input.
Note to Beer Magic.....I'm not ignoring your comments. I am simply unable to reply due to your privacy settings. Please alter them if you would like me to respond to your input.
Thank you so much! Big hug!
You're one heck of a teacher . Thanks for making both these videos. Everybody that wants to get into building tube amps like I do needs to watch these. Any monkey can assemble parts but it's so nice to be able to understand just exactly what's going on inside the amp and tubes. It's genius! I'm going to save these videos for future reference
Thanks so much, Tim. Rusty and I really appreciate your kind words. Best of luck with your amp project :)
the future came
Dear Uncle Doug, thank you very much for this explanation. The way you explain is cristal clear!! Thanks again!! Take care!
You're welcome, Carlos :)
I keep watching this. It's very interesting and informative and as a guitarist who has never really looked at the way amps actually work it's tremendous. I'm learning a lot here so thanks for taking the time. You gave a great knack for explaining quite complex concepts. Cheers!
Thanks so much, FT. We really appreciate it :)
WOW!!! YOU REALLY UNDERSTAND THIS & ARE TAKING THE TIME & HAVE TAKEN THE TIME TO WORK OUT HOW TO TRANSLATE IT TO US DISTRACTED IDGITS!? THANKS! You're the Tone Professor! My AMPS=( BROKEN!!!! I'm nothing without them & my wah. I need to shut up & listen again. I gave up after I didn't try!
r
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POW!!! THANKS THOUGH. INTIMIDATING. 2 THOSE BEING IDIOTS & TEXTING INSTEAD OF LISTENING.
You're welcome, Wyatt. We're glad the videos are easy to understand.
Thank you very very much for this. Fantastic.
You're quite welcome, Chris. It's great to hear from you. Please enjoy the other 97 videos while Rusty and I work on the next new one.......
Doug,
you have demystified, clarified, given your wisdom generously un-defy-ed and have teach-i-fied this stuff marvelously!!!
Oh, the books and websites that I have checked out and have picked up bits and pieces of good stuff but nothing like you have un-academicized and summarized, demonstrated-ized and put together in these two videos.
I have a beautiful but sad '68 bassman head waiting to be loved on and restored to it's beautiful condition and I think this stuff is my inspiration
THANK YOU, THANK YOU, THANK YOU!!!
Shall I go on???
OK!
You are the best-est 'youtube'/vacuum tube teacher around...
Eatin'it up!
Blessings, Joe Jach
Wow, Joe, you just made my day....and you're quite welcome. Nothing makes me happier than knowing that the videos have been viewed, understood, and appreciated. Thank you so much for your very kind appraisal :)
By far the best explanation of a tube circuit I've ever heard. Thanks Uncle Doug! Just getting into building amps and this has helped tremendously.
Thanks, TF....glad it was helpful.
Very good description for the vacuum tube rectifier. The "Correction" note at 16:56 has corrected a very series error in the explanation. I have tested radio tubes for about 20 Years at Tungsram in Hungary and I have immediately realized the error about the negative 325 V pulses going to ground. This is incorrect. Best regards, Patricia
Thanks for your input and confirmation of my correction note, Patricia :)
Very clear explanation.
Thanks, Andrew. I'm glad you liked it :)
Thank you so much for putting this video together! It is honestly the most understandable/relatable explanation of these topics that I've come across yet. After only a few minutes in, I had already learned so much. I will be watching part 2 immediately and can't wait to see more videos on your channel.
I've wanted to get into guitar amp and pedal building for quite some time but have always felt so overwhelmed by these concepts. I recently learned how to safely discharge capacitors in a tube amp and have started to read/watch more information about the basics of the components. This is supremely helpful, thanks again!
You're welcome, HP. We're glad the videos are informative.
Thank you so much uncle Doug - All your video's have been a huge help but this one in particular hit it out of the ball park!!!
You're welcome, KK. That's good to hear :)
Wildly easy to understand! Love your teaching style. Could I feasibly substitute in rectifier diodes for that tube?
Yes, diodes can be substituted for a tube rectifier. Weber makes "Copper Cap" Diode Modules with tube bases that you simply plug into the empty rectifier socket. It allows you to change back and forth from tube to solid state rectification without altering the circuit wiring. There are different modules to replace specific rectifier tubes.
Uncle Doug I'm very interested in trying my hand at building one of these. I've watched some of your other videos and some by others, and I think I understand biasing, basic tube physics, and the fundamental electrics. Is there a benefit from using a rectifier tube over a plain diode? Planning the project, I'm also wondering if I can wind my own transformers and achieve a good result. If I'm asking too many questions, where can I do some further reading?
Many people feel that rectifier tubes provide a more "vintage" tone, while diode rectification is simpler, cheaper, and provides a cleaner, sag-free sound. It's really just a matter of taste, I guess.
Re the hand-winding of transformers, I would advise against it, especially on a beginning project. You would probably be better off building a few amps with purchased transformers, gaining some experience first, and then perhaps you could delve into the mysteries of transformer design and construction.
0:50 No. AC voltage is not the total distance from top to bottom, and your +60 to -60 isn't even close to 120VAC.
AC is measured against the absolute average voltage from neutral; 120VAC hits about 170V in each direction, that's +170V and -170V.
You're right. This error was corrected in the video with notations that are not visible on all viewing devices, Christopher. For a much clearer, detailed explanation of peak voltage vs RMS please see my more recent video postings.
THIS GUY IS AWESOME! This guy rocks. This was exactly what I was looking for! So thank you for sharing your knowledge and wisdom, so thank you rusty for your contribution. Your owner will have to post a link where we can buy him a coffee.
Thanks so much, A&A. Glad you enjoyed the video.
I wouldn't think of a better introductory presentation of a world we love so much. Thanks, Doug.
You're welcome, Mr. A. Thanks for your very kind comment.
Dylan, your question did not have a reply capability due to your YT Privacy Settings, so I'll answer it here. The +325VDC output has passed through the diodes of the rectifier tube. The diodes, due to their alignment, only pass positive voltages. The -325VDC was rejected by the diodes (it was not allowed to pass through) and goes to ground. Think of the power supply as a 325VDC battery, with a positive output (from the diodes within the rectifier tube) and a negative output (from the ground).
hi Doug, im not sure if we had the same question but was wondering why if diode output is +325vdc and ground is -325vdc, why when we look at the amplifier stage it doesnt have +650vdc going to the output transformer with ground as a reference voltage of 0v? when looking at certain components like filter caps connected to ground and the rectifier, will they need to be able to handle 650 or only 325v?
thank you for the video!
This is an ancient video, NC. The voltage readings on the diagram reflect the readings you would get if you first measured the voltage between the B+ and ground.....or if you measured between the B- and ground. If you measure the voltage potential between the two secondary output wires of the PT with no load, it will be approximately 700VAC before rectification. After rectification, since only the B+ is sent to the center tap of the OPT (and the filter caps), the output tube plate voltage(s) and the filter cap voltages will be 350VDC to ground. All of this ignores losses due to heat, inefficiency, and the boosting of the smoothed DC to peak voltage.
@@UncleDoug where is B-? i was assuming B- IS the ground.
No, ground has zero charge. It depends on the bias of the rectifier diodes. I you take the HV from the cathode (as in amp HV circuits) you will have B+ if you take the HV from the plates, you will have B-. You need to watch my videos on power supplies and rectification.@@ncnoman
@@UncleDoug will do!, thank you for the answers. your videos are a tremendous resource. i appreciate your time. im hoping to learn about this, maybe build a few amps for educational purposes, so i can one day be able to help people in my area with tube amps. ive got an EE degree but i ended up going into networking. thanks again Doug
Ron Swanson :)
Michael Gutierrez I hear that a lot, Michael. I guess I'll have to contact this Swanson guy and ask him to quit imitating me :)
Wow, your metaphor of;
"the frying pan (Filament) cooking popcorn (Electrons) thats negatively charged, being sucked thru the chain-linked fence (Grid) to the positively charged Plate, and you can change the porosity of the fence (Grid)"
...is the best way i've heard to explain it. It actually helped ME more fully understand how they interact. Thanks for making these vids.
You're welcome, WS. When I was a classroom teacher, I found that making analogies involving common, familiar things often made the understanding of abstract concepts much easier. I'm glad the video was helpful. I would only add (just to be thorough) that varying the "porosity" of the grid is accomplished when the input signal varies the negativity of its charge (since a varying negative charge will repel more or less of the negative electrons passing through it to the plate).
Ahhh....AHHHH!!... ok, so, the guitar signal actually varies the grids negative charge. And the amount of negative charge the grid has in the first place, (controled by the...cathode resistor?) actually really repels the electrons rather than "let's them pass"?
The grid can have a negative charge for different reasons, depending on whether the tube is grid or cathode biased. This is needed to reduce the current flow from cathode to grid.....like a faucet that is 50% on. The input signal then varies the grids charge (more or less negative, but never positive) as if you varied the faucet from 25% to 75% (for example).....producing an output signal that is many times greater than the weak input signal.
Great! I was looking for something as good and simply explained for years. Better than anything I found in books so far. Thank you
You're welcome, Alex.
The narrative at 7:45, adding the two 6 volts, isn't correct. The two 6 v heater elements are powered with the same 6 v.
Sorry to disagree, but two 6V filaments in series add up to 12V, just like two 6V batteries in series would. Otherwise, the 12V filament tube could not function properly.
mdhsahb is correct, in that the filaments are connected in parallel, each powered by 6V. However, you are correct, in that the filaments could be connected in series and powered from a 12V supply.
@@UncleDoug you can disagree but you are wrong. The heaters are in parallel.
With respect to Uncle Doug, those heaters are wired in parallel with a 6v supply. If you had a 12v supply, you would wire them in series across the transformer, no central tap. In either arrangement each heater would carrying the same current through the same resistance so the power (I^2 R) would be the same.
@@wildbob If you are going to be white knight a least be sure you are right. It is not a matter of thinking he is wrong he is absolutely for a fact wrong. He has clearly drawn the filaments as parallel with 6 volts, and it's not a simplified drawing as you call it, they could be wired in series on a 12 volt supply just fine but that's not how he has drawn it. And to rain on your parade this isn't the only error in this video, there are several.
I have watched and read a lot about tube amps but never found as clear an explanation as you presented here. I am subscribing to your videos. Thank you for taking the time to make this available.
You're welcome, Tom. Thanks for subscribing and watching :)
I have also watched a few of your other vids which are right up my alley. I have several of the same amps you do. I have an old Davis amp similar to the 2 you fixed. I also have a B&H projector amp. Also I have a bunch of old Wollensak R2R machines & Muzak amps I modded for guitar which are both great sounding. I however am a novice. I really know very little about electronics but have managed to avoid electrocuting myself. Your videos are just what I needed. Keep em coming! I love your little aside comedy breaks with your dog & cat. Great deadpan!
We're glad to hear that the videos are helpful and informative, Tom. Best of luck with your current and future projects.
Love these explanatory videos, you get the how and why across in a way that I can understand. This is a special ability that few have! Many thanks for your efforts.
Our pleasure, Brian. Glad you enjoyed the vid.
I can't thank you enough Uncle Doug. Fantastic lesson and really helped me understand how a simple amp circuit works.
You're welcome, T60 :)
Hi Uncle Doug. I just wanted to thank you for your videos. They gave me the inspiration to build my own guitar tube amplifier (from a kit) and it sounds great. I appreciate your clear and detailed explanations. Thanks so much!
You're welcome, Fred. We're really glad that the videos were helpful. Congratulations on a successful first build :)
Wow!!!! You explained everything so thoroughly, and simple enough with your "comparisons" for me to have a better understanding of how amps work.
It has been a dream of mine to build my own "high gain metal monster amp"!!! Your video(s) are really helpful for building up my confidence to do so.
Didn't know that this video was 4 years old. Wish I would of found it sooner than what I did.
Thanks so much, Eric. Welcome to our channel. Best of luck and health to you and yours.
Uncle Doug, wish I had a mentor like you back when I first explored a career in audio. The good news is that you are here 30 odd-years later. Thank you
Im finally starting to get it! Always trying to learn more about my gear, have been very baffled about this topic. The way you explain has clarified alot for me. Thank you!
You're welcome, Kyle. We're glad the videos are helpful.
This is finally the first video i could find, explaining how exactly the amplifying of the base signal works! Thank you so much!
I'm glad the video was helpful, TS.
This is excellent. Thanks so much, will be watching the next part shortly.
best description of how a valve works I've ever heard. just an excellent video, thanks Doug
You're welcome, NT.....and thanks for the very nice comment :)
Absolutely the clearest thinking, best explanation I have ever heard from anyone.
Wow.....thanks, Jane :)
Thank you Uncle Doug for taking the time to make such videos and share them. You explain everything so clearly and make it easy to understand for beginners. Hope to see more in future :)
You're quite welcome.....Rusty and I appreciate your kind words and are glad the videos are helpful and easy to understand.
YOU SIR ARE ONE HELL OF A GREAT TEACHER....YOU ARE A RARE GEM THESES DAYS ...THANKS
By far the best amplification lesson I have ever seen! Your post-annotations during the video demonstrate your thorough knowledge of the subject and commitment to teaching it accurately. Well done!!!
Thanks so much, - - , I really appreciate your kind words.
What a gold mine of information! I stumbled on to your channel while looking over amp kit build information. I intend to build my own 5e3 amp shortly. I was a Navy Nuke ET about 30 years ago. This video was just the memory refresh I needed. You are a great teacher! Thanks sir.
Thanks so much for the very nice comments, Dennis. Good luck with your project.
This is my first time learning about these kind of circuits. Your teaching style makes this so easy for me to comprehend, thank you!
You're welcome, Daniel. Glad the videos are helpful.
You did a wonderful job explaining everything. Thank you for being thorough and simple!
You're welcome, HD.....glad you enjoyed the video.
Uncle Doug, you produce the best informational and educational content on tube circuits. Done in an understandable and clear manor. Uninterrupted by commercial advertising! I love this!! I'm learning to use and service my collection of vintage gear. Much appreciated.
You're quite welcome, CR. Good luck with the maintenance of your gear collection.
Yes, thank you for your time and video..... as a ham radio operater, and guitar player this was quit eye opening..... Born in the 1970's, tubes have always been a mystery. Mystery no more! Thanks again!
You're welcome, Tim.
Thank you Uncle Doug for all these presentations. Very clear and consistent !!. Now I`m able to service all my tube amplifiers properly.
Geetings from Poland. :)
You're welcome, Ar. It's great to hear that the videos were sufficiently informative that you are now able to perform all your own service procedures. Best of luck with all your projects.
Thank you so much. The best and simplest explanation I have ever had the pleasure of witnessing.
Zerung B Thanks so much, ZB. We're glad the video was helpful :)
Happy 5 years here: best tube amp wisdom around! Thanks UD
Time flies when you're having fun :) You're welcome, Joe.
This is one of the best videos on RUclips for those learning about tubes and tube amps. Hands down.
+MAN CAVE NO.1 Thanks, MC :)
Im a graduated mechatronics enginner, did my job only for few years and now Im a commercial pilot now for 10 years but I was always curious about tube amps as a guitar player. I was never taught this well unfortunately. Thanks for the amazing video.
You're welcome, SM. I'm glad the video was helpful :)
What a fine video by Doug and Friends. Old school, clear, concise, and generous. Thanks for all you do. Greetings from RUclipsland
Thanks so much, M1. You are quite welcome :)
Thank you so much for your videos. Your explanations are so clear and concise. And taking people through the whole diagram/schematic step by step is EXTREMELY helpful. If you weren't/aren't a teacher as a profession, you should've been. Awesome work and thank you so much again!
You're quite welcome. I was a teacher for many years. Thanks for your nice comments.
Aah.. this is the kind of explanation i need about tube amps, very clear language.
Much thanks to you Doug, keep it up :).
You're welcome, Len. I'm glad the videos were helpful :)
This has really helped taking the first hurdle in understanding tube amplification! I will watch it again and again to let this really sink in and grasp the concept. I have been wanting to learn this for years but never found the proper approach to get a 'foot in the door' with understanding it. This is absolutely great. Thank you!
You're quite welcome, W&S. I'm glad the video was informative, and hope that you continue to pursue your interest in tube amplifier theory.
its been 9 years since these videos were uploaded...why I didnt find them before is beyond me. Highly appreciate the lecture and the didactics. Tech talk on guitar & amps have been growing on me for a while and these suit the case perfectly. As the guy Jason just mentioned. You're an RUclips asset no doubt. Thanks Uncle Doug : )
Thanks so much, Caio Glad you found us.
It is the very first time that I actually understand any of the basics of a tube amp, and it is so much more simple than I imagined. Your explanation is so clear and I am so grateful that you took the time to share this. I have always had an interest in how they worked but thought I'd have to be an electrical engineer just to understand it!
Agtronic You're welcome, Agtronic. Rusty and I are glad the video(s) were helpful :)
This presentation is excellent. I don't have words to express how well you explain all this. Thank you!!!
Thanks so much, Tyler. So glad you enjoyed it :)
You are clearly a gifted educator. Thank you for this.
Thank you very much, Bill. I'm glad you enjoyed the video :)
Thanks for creating these. I've been trying to figure out how my amplifiers really work and you do a great job going through this step-by-step. You're giving my the confidence to probably order an amp kit and build one myself. I've never liked just bolting things together without knowing what I'm doing and you're giving me the skills I'll need to do a better job. Thanks again!
You're very welcome, Mark. It's good to hear that the videos are helpful. Building a kit amp would be a great way to increase your knowledge and confidence. Good luck with your project, and be sure to let us know how it turns out :)) ^. .^
This is quite easily one of the best things to grace the Internet ever. Thank you for taking the time to do this.
+Blake Hoss Wow, Blake. You're welcome.....and thanks for the very kind words.
Doug,
Thank you so very much for the effort that you and Rusty put into the channel, well you anyway.
You hit it out or the park with each post. The time you put into your drawings and show notes, meticulous preparation, just a stellar job man.
I wish I had you as an instructor when I was in school, maybe amplifiers woulda stuck better!
Thanks Doug!
You're welcome, Larry, and thanks for the very nice comments. Although I was unable to be your instructor when you were in school, hopefully the videos that Rusty and I post will make up for it :)
Very cool! You did a fantastic job explaining this stuff. Thank you for sharing your knowledge in such a digestible way for those trying to pick up on this stuff. Subscribed!
You're welcome, Daniel. Thanks for your nice comments, and for subscribing :)
As always, great job Uncle Doug. I look forward to your videos. This really helped my understanding of the filament heater and rectifier circuits. Looking forward to watching pt 2 later!
Thanks, GG. I'm glad the video was helpful. Part 2 is posted and waiting for you :))
Doug,I just found your channel and want to say thanks for putting these videos up.I truly look forward to watching and trying to learn what I can.That and I could use a break from Mr Carlson's videos.He's also a great teacher and has amazing videos in case anyone is wondering,
You're welcome, SJS. We're glad you found us and hope you enjoy our videos. I agree that Mr. Carlson's videos are top notch :)
Excellent couple of videos, thanks from New Zealand! I’ve read quite a lot but have still had lots of gaps and confusion, mainly concerning the dual functions of certain components, how they are handling dc and ac simultaneously and for different purposes. This was a huge step forward for me.
That's great to hear, Duncan. Please watch more of our technical videos.
Just preparing to build my first tube amp, a Fender 5E3 clone and came across your channel while researching.
Thank you for your easy to understand explanations and lessons, they've helped no end from both a technical aspect to a huge confidence booster.
Thank you.
You're quite welcome, Tom. Best of luck with your project.
Hello.
Sorry for my poor english. i am french.
Thank you for your great explanations.
This is the first time i understand the concept since 5 years .....
I think the concept is the same for audio amp .
It is very nice to build an audio amp and understand what we are doing.
Hello to your dog and have a nice day.
Thank you.
Greetings, MB, and thanks for the very nice comments. Rusty and I are glad you enjoyed the video. No need for an apology.....your English is much better than my French :)
I believe that is the smoothest explanation I have ever heard. This is a great sharing video for laymen of amps
Thanks so much, James. Glad you enjoyed it :)
I don't usually comment on videos, but had to comment and just thank you for taking the time to make a video like this. I learnt so much from just part 1. Can't wait to watch part 2.. And the rest of your videos! Thank you Uncle Doug!
You're quite welcome, Paul. It's great to hear that the videos are helpful and appreciated. I have posted over 100, so get some popcorn and an easy chair and check them out :)
Thanks for taking time to make these videos and teaching in a format just about anyone can understand. I've been itching to start my own build but I've been reading and watching videos like crazy to gain as much knowledge as I can before starting. Your videos are extremely helpful and they have achieved the goal I was hoping they would. Understanding how and why each component affects the next. I didn't want to just build one following schematics or diagrams, not knowing exactly what each part did. Thank you sir!
You're welcome, Jeff. We're glad the videos are informative and wish you the best of luck with your project.
I studied this 60 years ago, thanks for the refreshing lesson. You would have been a great teacher. I do love this old stuuf. Thanks for sharing.
Best instructional video I've watched on RUclips!!! TNX
+LPmiester I have posted over 120 similar videos, LP. Please subscribe and watch them if you get a chance.
Thanks, Doug (and Rusty). Really a terrific video! Giving talented teachers like you a platform for sharing stuff like this is one of RUclips's best accomplishments.
You're welcome, SM. Thanks for the nice comments.
Long time tube amp owner/user but electrically challened, I love this!
Welcome, David. You are at the right place :)
Thank you Uncle Doug - I've been waiting for this explanation my whole life. Bravo - absolutely first class.
You're welcome, Nick. I hope it was helpful.
What a great set of classes! As others have said, Uncle Doug is a tremendous asset to the community of guitar amp/electronics enthusiasts!
Thanks so much for your kind words, 300 :)
This is a great, easy to understand tutorial, I love the analogies of the grille being compared to chain link fence and the cathode to a cooking pan. Thanks for the great entertaining and educative videos.
You're welcome, CC. I'm glad you enjoyed the video :)