Build 300B SE tube (valve) amplifier with toroidal transformers
ฝัง
- เผยแพร่เมื่อ 1 ต.ค. 2024
- I read somewhere that a bad amplifier can't be made with a 300B tube (valve).
This is my attempt with the standard scheme but with toroidal transformers (Toroidy) and with a slight modification of the scheme. I added the PS anti-noise part (see Aikido SE output stage).
Schemes and photos:
drive.google.c...
I've seen many diy stuff for years but this is a piece of art. You my friend have a sense of design that is in every detail tobe not only efficient but beautiful. Hats off. I wish I could do the same (having access to more equipment helps...)
That was really cool to watch. I dont know anything about electronics other than how to plug them together. this is so awesome!
It really is mesmerizing with how beautiful and precise the work is.
Beautiful job. A masterpiece.
Those valves are works of art, beautifully complimented by your exquisite workmanship. Congratulations.
And how, in God's name are there any dislikes for this????
Mágico trabajo, ejecutado con amor, ha sido como ver a un lutier, fabricar su guitarra o su laúd! Gracias!
Damn - I hate you for building something that inspires me to build something. There are already too many beautiful things I want to build. Grrr.
Spec’s? Output impedance and distortion figures please? Lovely job aesthetically. Top drawer, congratulations.
Hi! Amazing work! Have you thought about making couple of more amplifiers of the same type for sale? I definitely would buy one from you :)
Very, very nice! Wish I could hear it.
Wonderfull...a very Best ampli...
Y would like to have this one.
..here in My Country
are expensive by the tax.
Saludos from Santiago Chile
Hi - do you ever make pieces on commission? I would be interested in discussing if so - thank you, Jonathan
No, making amps is my hobby, but thanks for asking.
This is absolutely top notch craftmanship. Exquisite and professional work in every detail.
Deepest respect from me.
All the best, from Magnus, Sweden P.S. Where in Makarska is it ? Only been to Baska Voda yet....!. D.S.
Makarska is 10 km south of Baska Voda .
@@RobertZovko Hi Robert, and thanks for quick answer!
Almost as soon as I had posted my comment, I remembered that Baska Voda was situated in an area called "The Makarska Riviera" around the capital city Makarska. I was there with my family in 2007, when the children were small.
All the best, Magnus
Hi again, Robert! Have you been happy with the sound from your marvellously well built amp? What kind of speakers have you used? What is your estimated output ? ( I assume it is a single ended triode type amp, running in class A )
Absolutely remarkable DIY in 2022 I was a little confused to follow your steps..but Thank your for presentation good Video…
Best regards
Love the inside of the chassis - how the components are neatly laid out in contrast to vintage electronics where they look like a bird's nest of wires. Beautiful.
Multumesc maestre.❤Sanatate!
This is a good video. It is a well-made product.
Congratulations!!
Super tasteful. Only the finest fixtures, toroids... What else could you want?
ESPETACULAR !seu trabalho é perfeito parabéns,arrumei vários amplificadores a válvula no começo de carreira, som ótimo !
Hi. You probably get this a lot but would you consider building one for me? I'm looking to get into my first amp and it would be so special to have you hand build one for me. It is exquisite. . . Thanks, ciejay
A work of art - and science. Thank you for sharing (and making) this.
Thank you so much for this. I've downloaded your complete plans set and this looks pretty straightforward. It'll be a while before I complete the project, but I will add to the community by creating a new video of the final project and attribute the design to you. Again, superb work and thank you for sharing.
I want one now!!
Fuck man this is a beauty! Going to try to see if I can do it, thanks for the inspiration
Very nice build! I have built one with the same schematic and will add the anti-noise part C2+C3 connection to reduce noise. Thank you very much for the hint, didn't know about it and can't see it mentioned in Popovich book either. Thanks again!
Good Job. Congratulations!!!
Sve čestitke za vrlo dobrom obavljenom poslu. Ovo je za primer. Elegantno, precizno i kvalitetno.
Yellow indeed! Why aren't all amp lights ever that yellow 😄
Beautiful work.
Love the Soundtrack of your video. "Smoke filled rooms" is a great album.
Your amp build is awesome - feel motivated now.
absolute genius ... definitely the best looking tube amp on youtube ... must build this before i die ... thank you for sharing on google drive so i can start doing my homework
Wow, looks beautiful! 👍
Thanks for sharing this amazing work. would you please share te specs of the mains toroid?
please see the link in the text, the second item in Boom.docx
woshine
1초 전
소리가 너무 선명하고 부드럽습니다, 똑같은것으로 하나 가지고 싶습니다
Wonderful craftsmanship.
Quality craftsmanship, I really liked the laser etching. How many hours did it take you?
Drying, half an hour and laser operation for a few minutes.
I am curious to the benefits of using a toroidal transformer over the laminated plate type. Seems like you should eliminate much hum or line noise from using this kind of transformer but makes me wonder why more people don't use it. Some of the most high end output transformers still use laminated plate type. I am considering trying toroidal but exercise some caution due to the expense. I always felt Toroidal transformers are the best and most efficient. I may build this amp.
Wow 😮 hermoso amplificador ...! 👋
Sounds great to me, i listen Silvaweld 300B monoblocks at home. Beautiful craftsmanship 👍👍👍
Multumim dl Zovko! 👍👍👍🌹🌹🌹 好好好
Video moves too fast. Nice cabinet.
Very neat and tidy with much thought put in to the actual physical layout. You must have had your nephew do the dicky solder joint because all the others I saw were damn near perfect!
Svaka čast, pravi ste znalac i u teorijskom i praktičnom smislu. O cijevnim pojačalima jako malo znam, a napravio sam tranzistorca 2x200W/8ohm. Želja mi je za njega napraviti cijevno pretpojačalo s pojačanjem 3-5x. Možete li mi preporučiti neku jednostavnu shemu takvog pretpojačala koje bi ja kao netko tko nikad nije radio sa cijevima možda uspio sastaviti? Još jedno informativno pitanje: Što mislite o circlotron cijevnim pojačalima? Jel istina da imaju bolji damping faktor od ostalih topologija i da lako kontroliraju zvučnike s kompleksnom višestaznom skretnicom??
This circuit design is flawed !It's been on the I nternet for ever !The pre needs to be a cascode ...See Skunky Audo's take on this circuit .In this configuration you get mass distortion @less than 3 watts ...
You need to have more subscriptions, so you get one! 🎧
Superb.. Congratulations Sir. Why those Ferrite beds..?. Would give a little about it..?
I put ferrite beads so that the amplifier would not oscillate or work at higher frequencies (>1 MHz). You can find more about it on the Internet.
@@RobertZovko many thanks, I never seen these beds in Tube amp making so asked. Thanks again.
@@tennivarghese867they are not needed when you have an all metal chassis that serves as a shield, (mine is part wood)
Excellent build, very neat indeed
loved watching a perfect job ! would love to listen to it !
great job. and beautiful looking Amp.. Kudos 👍.
Absolutely stunning. How did you learn building such wonderful things?
Thank you. I watched YT. 😉
Fantastic. I think a coke-bottle 5U4G would add to the already awesome appearance.
Already done
This is absolutely beautiful. I've been wanting to build an amplifier and stumbled across yours. Love the look and the attention to detail in the build. I would like to try to recreate this but with a different finish on the wood, black powder coating on the aluminum sheet, and black knobs. Could you help me with the specs on the power transformer? If I was to have this made, would I only need to specify my line voltage and the secondary voltages, or is there more to it than that? Would you mind sharing whatever specs I would need to have one built for myself with a 120V primary? Any help is very much appreciated.
May you list nominal voltages and currents for each secondary winding in power toroid, diameter of wire (or something except 10H 250mA) for choke toroid, and most important - parameters for output toroids please? Exactly what you ordered from factory. I need to order toroids, but I don't know parameters. You may list them on google drive too.
Absolutely beautiful build Robert. I love the CNC work on the cabinet and of course the layout of the electronic components. I built a kit into a Pink Floyd lunchbox and it came out great! It was not nearly as complex as your build, and it uses a pcb board but works and sounds great with my old JBL speakers. I rebuilt an old iPod which contains my entire music collection and the setup sounds great to my ears. I'm sure some hifi purists would critique my system to death but it sounds wonderful to me and that is all that matters lol. Like you, electronics are a hobby I use to amuse myself. I don't need to keep customers (or critics) happy lol. I got the kit from Tube Depot in the U.S. If anyone is interested. I believe I paid around $400 for all of the components.
A piece of art! 🥰
Glad to see somebody building their own equipment especially valve. I still have my late father's amp's and pre-amp he originally built in the late 50's and then rebuilt for me in the mid 90's his own design. They still work perfectly today!
Terrific build! How's the bass response Robert? I'm running a pair of 2nd generation Klipsch Cornwall. I've procrastinated an amp build for awhile, however I have built a preamp which sounds wonderful.
I don't have overly high quality speakers (Mission around 92dB), but the bass on them sounds decent.
Just one point of note as a loudspeaker engineer and manufacturer…SE amps, especially low powered SET amps have not got enough damping factor for any conventional 8 ohm or less speaker. Too high an output impedance. For bass control you should look to a Class AB PP design employing a lot of GNF for low output impedance. SET amps are fine for higher impedance speakers such as compression driver horn speakers but not suited to conventional speakers. People confuse power and bandwidth for control but all that matters is an amplifiers output impedance (NOT the speaker taps at 4 or 8 ohms but the actual impedance of the output transformer’s windings which typically for such an SE amp might be 2 to 3 ohms…very low damping factor as a result). I apoteciate though that this is an OTL so output impedance will be less= better control.
Lijepo izgleda, Nadam se I da isto tako zvuci. Haj-Faj uzivaj.....
So TH-cam can’t tell the difference between guitar amps and hi-fi equipment, but I’m not even mad...
Bravo na izuzetnom radu. Sve je pedantno uradjeno i prosto se ne može naći primedba. Kao da ga je radila neka brendirana firma. Još jednom BRAVO i pozdrav iz Beograda.
how many watt is the output? I am going to build this. thanks.
7W
Beautiful work. Great to see your adjustments too
Improve video!!! War software do u use for 3D?
If the question is which program I use for 3D modeling, the answer is Archicad because I use it at work as I work in an architectural office.
bravo!! Izgleda izvrsno. Jeste li razmišljli o mono izvedbama?
Hvala na komentaru. Nisam, upravo sa završio drugu izvedbu OTL i sad radim na PP triodnom pojačalu...
Hello Robert, very tidy layout, I wish you had some narration instead of music. Excellent video, well done.👏👏👏👏👏
A Lovely Job. Good soldering skill is important, as you have found out ;-) . I'd be tempted on the Mk II version to fit the input switch at the back panel, with an insulating shaft to the front control. This is a project that is as good on the eye as it hopefully is on the ear.
On a 300B PSE, 14-15 Watts is plenty! As far as sensitive speakers, do have any recommendations that are budget priced?
As for the specific speaker recommendation, I would leave it to someone else, it is important that the speakers have a sensitivity of over 90 db (/ W / m).
The higher the sensitivity, the less power the system needs for a given acoustical output. For example if your system uses 90dB speakers and 20 Watts per channel and fills a room to satisfying levels, then with 93dB speakers one would need only 10 Watts, etc.
Ok. Tnx!
Mark
Wonderful!
Thanks for sharing a lovely build. Regards Chris
So clean and tidy ... I only wonder about the current and speakers - I'm in love for thirty years now with my custom JM Lab ( Focal later) kit speakers that are very recently driven by a first edition Audio Innovations series 500 ... By the way what would be the price for it and have you maybe got any plans for a mono ? ( Why most makers when using such beautiful material for the plinth or box - never go a small step further - just getting rid of knife sharp edges and instead spend some extra wood in inspiring curves ? Ya know music after all is about liquid forms - not sharp edges ... No one ever asked for such form ? Just like LP 12 - what a sound - what a persistently sober and negatively inspiring any audiophile who has also a minimum design requirements from a hi end product sitting on the Olympic throne of sound for decades .. I can also think of so many rosewoods with colors and grain that would make myself and many more empty our pockets on the spot ... Serious about their sound equipment - doesn't necessarily mean looking Puritans dressed the part ..! Just looking out my window to the rosewoods i bought and taking back to Europe ( hopefully) to give the long promised second face lift to the long ago aesthetically upgraded Series 500. Will it be the Tigerwood - Purplheart - the hardest Lignum Vitae - or the impossibly rich Grenàdillo with the amazing variations and the super contrasting sapwood in spotty White with surreal Black grain for an impression of two color contrasting woods ? We spend thousands in search for the "right" sound - but then we HAVE to do with mediocre designs ? Think Black Palm with it's so rough grain matched to some Baboon Ebony trims maybe selector and power buttons cased in aN Ebony outer skin .. Each item could - should ( it's not restricting ) be one of - customization and personalization wise ... Simple things that would make a difference ... Sorry - I'm affected from the virus since a kid - and it's getting worse with advancing in the third age .. Yes it's about taking you there the quest in audiophilia - but why have just one sense satisfied ??? Be greedy - demand more ! Why not ? Ain't that hard and costs not that much - more ...
Thanks for the comment.
The design of the case requires my knowledge of woodworking as well as the tools at my disposal. This form of housing is the easiest to make and looks acceptable ...
Forgive if I was misunderstood for criticizing - I admire every creator after perfecting his object ! In this my remark should be taken not as negative criticism but rather a positive counter suggestion ! I also indeed would be interested to listen if marketed .. You want a bit of self sarcasm ? Since '97 been losing my hearing - losing ... lost better ... So apart from weirdly somehow finding joy in endertaining wife and friends with some great music - and leaving to me imagination and electronics replace the loss- while try to satisfy all remaining senses the best I can .... Creation has many forms !
@@andreasoulis Everything is fine, we understood each other. It was just self-criticism, we should always strive for better ...
I had a SET 300B amplifier and I feel in my opinion that it has better sound quality than any other tube amp. But it only put out maybe 8 watts. So I sold it because it lacked enough power to fill the room like my 20 watt 6L6GC push pull. I want to build a 300B SET amplifier but with more power so I will use 2 of the 300B’s in Parallel as you mentioned to me. I am not familiar with the PSE 300B, so I will explore the internet and look for that schematic. You mentioned better speakers. Do you have recommendations for good speakers?
PSE = Parallel SE
I wouldn’t recommend a specific scheme to you because I haven’t tested it myself, but you can find it along with the scheme and comments from others who have tested it.
I note that with two 300Bs again you won’t get 20W maybe 14-15W.
I didn’t say better speakers than more sensitive ones. It means higher utilization of invested power.
u got it.
try these.
www.paradigm.com/en/floorstanding/signature-s8
I bought many speakers before I've met these.
these r my babies. I run'em on 5.1 surround.
I'm able to shake my Whole neighborhood.
@ Vital Ral. Thank you for that information!
Would love the diagram and parts list for this. Brilliant
please see the link in the text
Good job! Sounds great!
Gorgeous build on this amp BRAVO!!!
Itza vera nica! I needsa to want one. (Now, where did I put my soldering iron?? 🎧
i thind better sound if 300B grid dc coupled from 6sn7 catode! and biasing the 6sn7 grid!
Hello Robert. I recently came across your youtube channel after looking for DIY videos of 300b tube amplifiers. Seeing your video and meticulous work has inspired me to want to build my own amplifier. Its been over 20 years since I last studied physics / electronics so while most of the terms are familiar, its like seeing them through a foggy veil!
I was wondering if you could share the schematics of this build as a LTspice model so that I can actually study voltage / current across the circuit to better understand the same?
Once again, thanks for sharing your knowledge on the build. I do hope I can do justice to your amazing design.
As the scheme I was working with was pretty checked I had no need to do an LTspice model. As for the voltage, you can see them on the circuit I made available. If you still need some voltage or current on a certain component, feel free to contact me and I will be happy to provide the information.
@@RobertZovko Thanks for you response! I think I will try to design the same in LT Spice for my understanding and hopefully a refresher on circuit design 😀 . Thank you for your offer to help clarify my doubts. Shall try and figure this on my own as far as possible 🙏
Varun
Torroidal transformers hate standing DC current. It makes absolutely no sense to use them in an SE amplifier
They are great in PP amps however. This is just physics I'm afraid. That's why they buzz horrendously if there is the slightest DC on the mains.
Those are made differently and specifically for single ended. Look at the specs on their website.
Those have gap in core.
Really great and accurate design and manufacture. Every second of the video is full of hints.
Congrats! Great project, great craftsmanship and nice background music 👍
svaka čast malo remek djelo
Top notch craftsmanship 👍🏼
Maybe it is the architect in both of us ... but I truly appreciate the beauty of your layout and your build quality ... Is the lighted power switch from Blue Sea Systems ??? I've been searching for it online and the only ones I have found are only rated for 12 V. .
the switch has two voltage designations, one is for the supply voltage of the LED and the other is the voltage designation of the switch.
e.g.
www.aliexpress.com/item/4000032282063.html?spm=a2g0s.9042311.0.0.d91d4c4dWdab3P
www.tme.eu/hr/details/82-4151.2113/prekidaci-pritisni/eao/
@@RobertZovko Thank you !!!
Hi Robert, what kind of rod did you use for the ground buss in your fantastic build ?
Copper wire, silver plated. Diameter: 1.5 mm.
@@RobertZovko Thank you, Sir !
Da li se to isto, mislim na zamjenu EI transformatora sa toroidnim, može napraviti i sa Vašim prvim
pojačalom SE KT88/EL34 autora Abdellaha sa revizijama, kojeg sam imao i ja u planu napraviti.
Dakle da li bi mogao sa adekvatnim toroid transformatorima, po svim specifikacijama, zamijeniti
originalne EI bez uplitanja u samu shemu. Planirani transformatori su također poljskog proizvođača
Toroidy. Napajanje TSTA 0250/002, Izlazni TTG-EL34SE i Prigušnica TDS10/250.
Naravno da. Ako napravite pojačalo zanima me frekventni odziv, mislim da će biti značajno bolji nego sa transformatorima koje sam ja koristio
Thank you, Rob, for your attention to detail and execution of the highest order.
You have placed all components parallel to the chassis edge. I do this myself but many builders run them at angles.
It is important that the DC and AC wires be at right angles or as far apart as possible. The same goes for components of different channels ... I personally like that all components are aligned in the same direction, this is for visual appearance only, but I follow the rules above.
Really awesome work! Wish i could do that!
One more thing... why not having a feedback? Would that improve (if needed) the performance and frequency sensitivity?
The feedback changes the sound ... In my opinion, this amp is not needed but it can be put as you wish.
Wow! Rare to see DIY audio done with such skill and attention to detail! I bet it sounds as good as it looks :)
Hi Robert, very nice build. Love the toroidal transformers!
I built a very similar one a while ago, but I cheated and used a PCB to mount all the components (from Douk Audio) and "normal" Hammond transformers - 378X and two 1630SEA
I also used a different heater regulator that Rod Coleman designed which was a great improvement over the LM1084 regulator the original design was using.
I especially like the vented chassis plates you used to mount the tube bases - where did you get those from?
like this www.ebay.com/itm/Lot4-vintage-vacuum-tube-shock-proof-plates-fr-8Pin-octal-tube-socket-KT88KT6-JF-/254558646587?hash=item3b44e0b13b
or see aliexpress
Could have been interesting with vocal comments.
I agree, but my English is not very enviable. I will try to make the following video with more comments.
@@RobertZovko sir (or dragi gospodin?) I've read yout answer so
I wish to APOLOGIZE my comment which is actually unfair. The subjet is rather technical so you may consider that even your "not enviable english" could be rather suffisant to explain your very beautifull 300B amp if you explain why. You may also use subtitles , even asking someone on the web to translate your idea. This for me the point : you expose an IDEA and it would be great to listen ou read the MAN.
What's about covid19 around you?
@@marcamant7258 Much better. In the last two days, the number of newly infected people has decreased significantly. Croatia is a small country, organized quickly and well if we remain disciplined, I think we can quickly overcome the worst.
Nice job!
Jos jednom, svaka cast. Vas rad je rad umetnika. Pitanje: da li ste sasvim zadovoljni toroidima, ili je ipak bolje ici sa klasicnim transformatorima? ( your work is the work of an artist! Quesion: are you totall satisfied with toroial transformers or would you have gone back to the client c ones?)
Rad sa toroidnim transformatorima je više dokazivanje sebi da isti mogu raditi u SE režimu, kako sam na više foruma našao da toroidni ne mogu raditi sa DC strujom zbog nedostatka proreza. Na kraju sam ugodno iznenađen kvalitetom zvuka koji isti pružaju. Što je bolje? Ne bi ulazio u tu polemiku, ja osobno sam zadovoljan sam snagom i zvukom...
bravo majstore, izgleda fantastično a kladim se da isto tako fantastično i zvuči
love the toroidal transformers ... the old plate metal transformers look so darn klunky...
Amazing craftsmanship... Just the power switch looks a bit out of place.
AC away from the rest of the components.? The position itself is in the inscribed circle of edges.?
Work of art!! If I were to make one change it would be to use a stepped attenuator instead of the volume pot you have.
Great project Robert. And thanks for sharing your design. I have decided to use your video as a guide to build this tube amp. Was there a specific reason choosing KPCU-01 over MPK-14 for 0.22 uf? Given the price difference?
In this case I prefer the sound of copper-polypropylene-paper or PIO
I assume it's been about a year since you completed it, is there anything you've discovered over that time that you'd do differently today?
The only thing that bothers me is the color of the cover. I didn't make a cover from the same piece of wood so there are differences in shade (I don't want to paint the wood). Everything else is just the way I wanted it.
@@RobertZovko It's certainly a work of art in my opinion and thank you for sharing your extensive documentation on your google drive as I just may look to build one of my own!