Anytime I get to learn something new in every of your videos, it's a great job, thank you very much.

Muchas gracias amigo excelentes todos tus videos. Thank you very much, excellent friend, all your videos

Love how you made it and how it looks. Would love to make one myself.

Wow, two thumbs up !! Sooo many things to learn from this. Wonderful job, KH !

You sure do make the best of very little! Well Done!

Very nice little amplifier. I love the 2n3055 transistors they are tough little transistors. Remember to use a little heat conductive grease between transistor and heatsink next time to keep them cooler as they hate heat and can overheat very easily. Greetings from sunny Jamaica.

Montei e funcionou muito bem . No lugar dos 2N3055 usei 2N3773 , no lugar do 2SC2229 usei MPSA 42 e no lugar do 2SA1013 usei MPSA92 .

@geandroabelha9687

5 жыл бұрын

ficou file amigo , estou com 10 transistor mj802 jogado aqui em casa , estou pensando em usar neste pojeto

@mcreismcreis6264

5 жыл бұрын

Posso colocar mais de um transistor na saída pra aumentar a potência

@Roldaoviana

2 жыл бұрын

Pode me passar o PDF... Layout

@Roldaoviana

2 жыл бұрын

PDF please

Good Job!! Thanks 4 sharing.

you have solved the work man congratulations bravo

@InnovationKH

6 жыл бұрын

Thanks you

I like your work , great

Chasis Manhatan, muy adecuado y muy pedagogico. Buen trabajo gracias

@saifulali771

6 жыл бұрын

saiful. Ali. 8918257637,

Lots of hate in the comments from folks who couldn't tin speaker wire..... Fun video!

Nice and beautiful sounds good work 👍

Sound is pretty good! No distortion.

Nagyon super!😊

You could have used a copper clad or even perforated board for that. The Soldering joint would break if the project is exposed to long term vibrations(like if you install inside a subwoofer enclosure) ... Also i think that amplifier is maybe 40watts RMS or so because the transistors and heatsink is not sufficient for 100W RMS I've also built many mid powered amplifiers(100watts to 300watts).Hope you take my suggestions in a positive way.

@andygozzo72

6 жыл бұрын

probably 100w peak...

@Phantom.3296

6 жыл бұрын

DFRAMe 4991 but electronics has came a long way though

@andygozzo72

6 жыл бұрын

it certainly has, but that sort of construction does work, i've done similar but different in the past for a quick lash up, plus 'point to point' chassis construction was used for many years in tvs and radios.. i've even done 'semi surface mount' using normal wire ended components with wires cut short on the copper side of a pcb with no 'through holes'

@williamguillen4113

6 жыл бұрын

That tecnique is very useful for prototyping . Point to point and dead bug mix.

@v1los

6 жыл бұрын

I agree that the heatsink is totally insufficient, but the 2 transistors will easily handle 100w RMS. They are rated at roughly 60v 15amps, so with a 4ohm load, they will only be running at around half capacity!

Soldering components like this in an audio amplifier may cause background noise because of the connection wires that act like antennas. Also, connecting the heatsink to ground is a good idea. Overall this is a pretty good circuit, well done :D

excelente amplificador amigo saludos amigo

@InnovationKH

6 жыл бұрын

thanks you

é verdadeiro passo a passo, legal gostei

شكرا جزيلا لك على المقاطع القيم استفدت منك كثيرا

@InnovationKH

6 жыл бұрын

It's OK, thank you

SEU TRABALHO É MUITO BOM E INSTRUTIVO , PORÉM PRECISA TER UM ESQUEMA ELÉTRICO PARA FORMALIZAR O PROJETO, GOSTEI MUITO , MAIS A LISTA DE PEÇAS E ESQUEMAS SÃO FUNDAMENTAIS ! UM ABRAÇO E O BRASIL AGRADECE !

for the sake of thermal stability, there should be a .27Ω connected in series with the emitter of the high side 2N3055, and another connected to the collector of the low side 2N3055. As the transistors heat up, the bias current will increase, heating it up more, setting up a thermal runaway condition. Another thing that would help, is if the 1N4007 diodes can be thermally coupled to the heat sink. As the diodes heat up, their voltage drop decreases, to match the base-emitter voltage drop doing the same. That will give thermal compensation, allowing the lowest possible value for the emitter follower resistors, to give the maximum output power.(you might be able to use .15Ω resistors instead, if the diodes could be thermally coupled to the heatsink) You might consider a bootstrap circuit to bias the high side transistor darlington, to fully drive the high side, for maximum power. Using a pull up resistor to the positive supply means that the bias current goes down, as the amplitude increases. That means that the bias current is at a minimum, when the maximum bias current is needed. This amplifier doesn't have any negative feed back, so the output current is proportionate to input voltage, rather than the voltage ratio being maintained. this is a perfect guitar amplifier, and not quite as good for high fidelity reproduction. That's why the sound is a little thin, as well as limitations in the microphone used to record the sound.

Mast hai Hame aise video chahiye Pcb board milna bohot dikkat hoti hai Ye apna Mast amplifire banaya hai

5:25, good for salvaging parts from other circuits, but can we take a minute and ask WTF HAPPEND TO THAT INDUCTOR?

@user-sd3kt8ng8m

5 жыл бұрын

I know I'm late but it died :/ in a really painful way

Sir aap ko ye implifair hame bahut achha laga ar bhaiya aap ek yeshahi 300 watt implifair ka video banaiye

Good !! (Pra quem é BR ou fala português) Pessoal faço projetos relacionados a eletrônica ,dentre outros .

100 Watt Sinewave power or Music power? If sine power with a 4 ohm load, The 2n3055 wont live Long, To get 100watts with 4 Ohms you´ll exeed the max CE Volt Rating of the Transistor

@billybonewhacker

6 жыл бұрын

Graham Pinkerton i never could figure out what ohms the speakers were. That might be a long-term life issue. Pluss im not sure about those t-03 pads he was using. If they would sink right?

@andygozzo72

6 жыл бұрын

probably 100w 'peak' power or 'peak music power' 😉

@Nanobot02

6 жыл бұрын

Who cares - its an "Easy" Amp and it Sounds quiet nice even through a microphone and other pair of speakers.

@BH4x0r

6 жыл бұрын

no lol, 60v and 15a is their max, for 100w on 4 ohms you only need 20v and about 5A which is all more than safe for these transistors.

@shutdahellup69420

5 жыл бұрын

@@ach_ja lmfao

I'worked for a mobile disco ( i was the Dj ) we had a 200w rms per channel stereo amplifier made out of 2n3055 transistors , it needed 6 x 2n3055 transistor per channel to obtain 200 w rms .2N3055 are strong reliable transistors if they are well used and have huge aluminum radiators to cool down them .

ឡូយមែនប្រូ

but clipping is still there in the bottoms.

No good filtration font and no good dissipation hot transistor. But, is good idea.

Lovely Lovely Lovely Lovely, please make same videos on 2sc5200&2sa1943

Nice job

sounds clean

Nice work bro!!!...kindly tell me which devise u can used for checking signal quality??? Reply must plz.

thank you

To get 100 Watts RMS you need about 50-0-50 Volts DC.

@talkthethings7376

4 жыл бұрын

william guillen it depends on the load resistance, for 8 ohms yes

@Zebra_Paw

4 жыл бұрын

it would burn with this voltage! Need to change some resistor values! I am using 36-0-36V DC to power it and getting more than 2*100W (i made a stereo one, that means two amplifiers, one per channel)! This is due to speaker impedance, i am using 4 ohm speakers!

For transformer with 2x21,5V is maximal sine power 70W/4R.

@Zebra_Paw

4 жыл бұрын

No because after diode bridge and capacitors (here capacitors are too low), you have 30-0-30V So 30/4=7.5! 7.5*30=225! Thats max watt in peak!

Véi! Muito bom esse projeto, mas ficou muito confusa essa sua montagem. Mostre o esquema elétrico mais bem desenhado e mais detalhado. Abraço!

Super!🙂

I count 7 transistors don't expect much if you can't count to at least 4 . the old school point to point breadboard construction is kool

Don't leave that thing unattended. And keep a fire extinguisher nearby. ⚡️💥🔥🔥🔥

Nice video.

very nice..

2nd generation solid state amp..... quasi-complimentary design. split rail design eliminates the need for a speaker capacitor.

សួស្ដីបង​​

Good project

good.I like it.

@InnovationKH

6 жыл бұрын

Thanks you

CErtains diront que cen'est pas'''''beau'''''Mais le principal est que ça fonctionne,fait'''maison''''etqueca donne envie aux débutants d'essayer !!!!!!!!!..........

@Zebra_Paw

4 жыл бұрын

Oui! C’est excellent comme amplificateur! Par contre les condensateurs de filtrage de l’alimentation devraient être des 10’000uf, ici ils sont trop faibles (4’700uf)! Moi j’ai fabriqué deux amplis de ce type, un pour gauche, un pour droite! Bref un stéréo! Il m’a fallu donc 22’000uf comme condendateurs de filtrage! Juste un truc, ici presque personne ne parle français XD! C’est pourquoi j’écris mes réponses en anglais!

Can you please give me schematic diagram would love to try it I used to repair things before and now you inspire me to do again.

@InnovationKH

5 жыл бұрын

goo.gl/yAyuiD

first song at the end of the video?

Hello, you are a master of the amps ... first of all this is a translation since I do not know English I am Spanish sorry..I have a question I want to mount a 6n2p and a pcl86 to make a 6w on a vintage radio chassis but I have a doubt about the mass ... gnd .... and the chassis..I do not know whether to make the chassis driver with gnd ... and if that is how I do it ... I connect all the points of mass to a single point ... it can be done in several ... or only the potentiometers and jacks go.

@InnovationKH

6 жыл бұрын

Hello, i'm not master of the amps.. i'm learner electronic. thanks you for watching

How to make a "100 Watt" Amplifier using two 2N3055 devices. Three steps: 1) Read the datasheet and safe operating area (SOA) curve sets for a 2N3055. 2) Figure out how much DC voltage and current would be required to produce 100 Watts RMS of power into the speaker load you intend to drive. Note that I am not talking about peak, peak to peak power rather RMS (Root Mean Squared) power. 3) Ask yourself if it's solid engineering practice to be using two devices in such a fashion against the SOA curve sets and using the amplifier design you intend to use. Blow speakers, transistors, and fuses at your own risk and peril. You Tube is full of variations on these circuits and all I can say is they are entertaining in albeit a tragic comedy kind of way.

thanks for this bro.. anyways can i put a second Speaker? so it'll be stereo?

@vincentrobinette1507

4 жыл бұрын

For true stereo, you would need to build a second amplifier to have 2 channels. (both could share the same power supply)

@Zebra_Paw

4 жыл бұрын

@@vincentrobinette1507 yes i made it! But even for 1 amp you have to increase filter capacitor value for power supply! For 1 amp it should be 10’000uf For 2 amps it should be 22’000uf or 2*10’000uf in parallel!

Is it just me, or did I notice a metric shipload of crossover distortion on the scope (before the OP transistors were hooked up)?

yes keep it up

Friend would be great one so but smaller the PCB to adapt to a Sony Genesis and to replace STK 412-150 to 45+ 0 45-

video intéressante!'''musique'''casse-burnes

@Zebra_Paw

3 жыл бұрын

LOL! Personne ne comprend le français ici! Mais... t'as pas tort!

very nice

did you change the original scheme? in the schematic was a resistance of 33k from the base of c1815 in the loudspeaker you put it in gnd on the speaker in the schematic is a 10 ohm resistance you put 100 ohm at input resistance of 33k is on - at capacitor you put in + resistance

@Zebra_Paw

4 жыл бұрын

Circuit diagram here: kzread.info?q=https%3A%2F%2Fgoo.gl%2FyAyuiD&event=comments&redir_token=QUFFLUhqbjFIWnNHOWVqVFJwOFR3elRUSGdlRTU1dkxKZ3xBQ3Jtc0trakVjQVJDWUtjVGFYLUptX3ItZFBWdlZlN2lJSVRkRXEyelhYOWE2OGxhYmxmbks3NUZPeVpfNEtmVDZsTTFUVDhZVDFEcF8xaTd4d0ZEbzZmblYzYmlud01EcHU5bFB3STJXeGpwenBPNGFQQ3d4RQ%3D%3D&stzid=Ugz5xqBe1lIXEuw90a14AaABAg.8ZgpMOhMsZk8ZmU908FXi8 Just replace input capacitor by 100uf capacitor and input to GND resistor by 10K resistor!

Hi, can you tell me what are those capacitors values at video's timing 2.17 3.12 3.35. 4.25 5.44

@InnovationKH

6 жыл бұрын

please watch here: goo.gl/yAyuiD

megusta esta bueno.

AH , PRECISA DESCREVER PASSO A PASSO, ESTE VIDEO VAI BOMBAR , VAMOS JUNTOS NESSA , EU QUERO APRENDER, QUAIS AS PEÇAS E TRAFO A SER USADO ,AS LIGAÇÕES ETC. ETC....

Woow if it was so simple ...Y did companies like Sonodyne, Cosmic etc... close down in India ???

Nice!! Envy your God hand

Thanks

Can u tell me . Which components are need to this curcuit can u give a list of it

@heangbun4163

6 жыл бұрын

Looking for circuit diagram here: goo.gl/yAyuiD

@johncoops6897

6 жыл бұрын

Why would you bother, when there are PROPER circuits and amplifiers out there.

@md.rayhank8968

6 жыл бұрын

sajal paul

@jillamistoso7553

6 жыл бұрын

sajal paul

@MarkTillotson

6 жыл бұрын

What an awful diagram, its all upside down and backwards. No, avoid this, go find a decent design from Doug Self or similar - < 0.01% THD, there's no reason not to achieve this. Decent amps use better transistors too.

i like it

What is the size of the PCB that you used?

good one

@sarathkumara6335

3 жыл бұрын

Bro see my commands and help me

@sarathkumara6335

3 жыл бұрын

I have made this circuit ,,,,,,grid is coming good but ,,,,,Transistor connecred in + voltage is becoming more heat within 2-3 second ,,,,,,,,,,,,help me bro to solve my problem

Great idea for your pcb. I wont forget that option :) 5:46 is that a rectifier?

@technicmasters7936

4 жыл бұрын

yes it is

@Zebra_Paw

4 жыл бұрын

you need to increase capacitor value to 10’000uf, 4’700uf would be too low!

Very unusual configuration. Class C amplifier maybe?

@westelaudio943

5 жыл бұрын

Class AB pseudo complementary...

@vincentrobinette1507

4 жыл бұрын

Class AB, but, there is no negative feedback. The output CURRENT is proportionate to the input amplitude, rather than a fixed gain ratio. This is a perfect guitar amplifier output stage, not so good for high fidelity reproduction. (you could tell by the way it sounded)

@williamguillen4113

4 жыл бұрын

@@vincentrobinette1507 Sorry, my mistake, I mean class B, not bias adjust and you can't get 100 watts with 30-0-30 volts or maybe at 2 or 1 ohms load but anyway, I don't think so.

@vincentrobinette1507

4 жыл бұрын

@@williamguillen4113 If the transformer would hold the 21 volts he measured, the capacitor charges to the peaks. That is high enough voltage for 100 watts RMS, but, the transformer voltage surely drops under the heavy load. I'll bet, the amplifier would measure at 50~60 watts RMS, ~100 watts peak. (it is a "beefy" transformer)

@williamguillen4113

4 жыл бұрын

@@vincentrobinette1507 Obviusly i´m taking about RMS power, 1khz, 8 ohms load, is a standard. 21 volts are AC on DC you get 30 volts.

Excellent project, I want to know if it is possible that it works, feeding the amplifier with a 12 V transformer.

@Zebra_Paw

4 жыл бұрын

No sorry! But i can help you to make it! I made a stereo one (two amps, one for each channel)!

@yourethebest7345

3 жыл бұрын

@@Zebra_Paw help me then my WhatsApp no +917000832905

Sorry chum you´ll only get about 69 watts out of that Thing even if you had the right Driver tranmsistors not those tiddly things your using.

@mf.598

6 жыл бұрын

Graham Pinkerton hi I'm wondering if you NB can help, me?~

@grahampinkerton2091

6 жыл бұрын

To get about 75 watts Sinus power into a 4 ohm Speaker you´ll Need a power supply delivering about plus and minus 30 Volts. nock about 10 Volts off that you´ll get about a 50 Volts to avoid clipping and excessive distortion a clean sinewave swing. Dont Forget the 2n3055 max ce voltage Rating is 60 Volts. Which is they wont last Long. Better to use a TIP 42 and a TIP 47 Darlington Transistors This config will give you way over 100 watts with a p.s of + - 40 Volts.

@Bullwinkle39

6 жыл бұрын

graham, you seem like you could help me with an old amplifier. it's a marantz intergrated amplifier pm-25. the transformer has blown and i would like to replace it. would you be able to help?

@grahampinkerton2091

6 жыл бұрын

I dont know this amplifier. What part of the trafo is blown is it the thermal fuse or the mains winding? If it´s the mains winding burnt out, then only a new regplacement trafo is necessary. 30volt 0 30v sec winding rated at 2 or 3 amps, or better still get a direct replacement from a marantz dealer. One could short out the thermal fuse but not recomended.

@Bullwinkle39

6 жыл бұрын

Graham Pinkerton thank you, it's the primary winding thats gone. I can't source one at all and wasn't sure if the output would be 30 0 30 or not

If we can use 35-0-35 Transformer. It is ok for this circuit ?

Nice, but did you know how cheap an pcb is?

@dobosliviu-george8004

6 жыл бұрын

Asta e si ideea sa-ti arate ca poti face din orice. Inovatie

What about the bias load resistors

@vincentrobinette1507

4 жыл бұрын

I suggested "emitter follower" resistors on each of the output darlingtons, for the sake of temperature stability, and to mount the diodes on the heatsink, for thermal compensation. This amp, as shown, is subject to "thermal runaway".

Sound quality is not good, but also easy to self-excited, negative feedback circuit is not painted

@InnovationKH

5 жыл бұрын

thanks for watching

@user-hp6uw6uz6v

5 жыл бұрын

ok

@Zebra_Paw

3 жыл бұрын

I made it but i had to change some values, and then the sound was incredible!

Quá hay

@luanluusuoirua1328

6 жыл бұрын

Đâu z tr

Auto Subcribe!

I'm from Indonesia, try my brother to make me a diy 2n3055 quad power amplifier for me to practice making audio at home to make the neighbors loud🤣🤣🤣plus make modul mp3 bluetooth!

Can I use two 12_0_12 transformers in series Also tell me current of transformer

@99hari55

6 жыл бұрын

Aniket Singh .... definitely....but both transformer is in same Ampere....if one is 3 Amp Transformer Another is definitely 3amp or low powered Transformer instantly become hot and burn....!

ធ្វើប្រេ អំភ្លីមួយទៅប្រូ ស្រួលសារ៉េ Bass និង trible

@InnovationKH

5 жыл бұрын

yes, thanks for watching

Sir can you please please make 2n3773 amplifier circuit diagram

@MINUX75

5 жыл бұрын

only juste replace 2N3055b by 2N3773

nice

value of the green electrolytic capacitor is not listed

What is the name of the plate on which two transistors are placed?? Plzz reply fast ☺

If you drive those poor 3055's like that, you need a much bigger heatsink.

@Zebra_Paw

4 жыл бұрын

Thats right! But im using MJE3055! It is the same as 2N3055 but is has TO-220 package! Then putting them on a big heatsink is easier!

PCB LIKE BOSS

how many watts this speaker? how many ohm this speaker? and how many voltage and ampere input this circuit

Really old school but surely not 100W from two 2N3055. Maybe 35W...

@blaharadek666

5 жыл бұрын

+ horrible sound

Y digo yo si no sería más fácil montarlo en un circuito impreso.

AH IA ESQUECENDO ; PARA QUE TIPO DE AUTO-FALANTE E SUAS RESPECTIVAS LIGAÇÕES. OUTRO ABRAÇO ME AJUDA AÍ !

Que bueno en español y al menos que alguien hablara

Can I use another transistors equivalent to those small BJTs

@InnovationKH

6 жыл бұрын

u can but calculate beta of transistor value

Sooooo..........a "2 transistor" amp, which uses 7 transistors........

@Zebra_Paw

4 жыл бұрын

5 transistors for the driver! We don’t count driver transistors!

C2229 or c2383 ?

@InnovationKH

5 жыл бұрын

C2229

Hello from brasil. It is So Hard to find this transistor here .. Is there any where i could buy it online?

@InnovationKH

6 жыл бұрын

It can instead by bc547, thank for watching

@Zebra_Paw

4 жыл бұрын

what parts do you need? I can give you links! Just something: replace 4’700uf capacitors by 10’000uf capacitors and replace audio input capacitor by 100uf capacitor!

sir am I use equlizer

42-0-42 volt aur 2.2amp supply can use.

@vincentrobinette1507

4 жыл бұрын

2N3055 transistors can only handle 60 volts. your power supply would need transistors rated for 100 volts, to be safe.

@Zebra_Paw

3 жыл бұрын

No because transistors only get 42V each! I am using 36V-0-36V DC and it works! But overall it is 72V

@vincentrobinette1507

3 жыл бұрын

@@Zebra_Paw At zero signal, you're right. but, at full amplitude or clip, the transistor that's off has to withstand full rail to rail voltage, because there is NO voltage across the transistor that's on. The transistors have to swing the full voltage of the power supply, even though, the load is referenced to the center tap, to produce an AC wave form.