DIY home made Tube Amp working.

[kuper02]

@02:00 , was it planed? for the applause in mean : ] any way, you deserve it! very nice job

[Cesarsound1]

@kuper02

Hi, thanks for your kind words :) !

That applause was not planned.

[robot797]

firsth

can i have circuts!

second

it has a small distortion at the high end

but it makes it sound better

[Cesarsound1]

@robot797

Hi, thank you. I will make the schematics soon and share it.

[hollandampsguy]

nice job man !!

[Cesarsound1]

@hollandampsguy

Hello, thanks for your comment!

[bwdidwhat]

Bro, why are you using the headphone jack for the input? It is internally amplified by the iPod to drive headphones. You'd get a much cleaner sound using a line out connector. It is pins 2, 3, and 4 on the iPod if you wanna diy. Still sounds good though.

[bwdidwhat]

Wow this is crazy, I'm watching videos on youtube with headphones on, and this one sounded like when I have the headphones on but unplugged. Tripped me out for a minute.

[Cesarsound1]

@bwdidwhat

Yea, the tube sound is magic. Thanks for watching.

[RafaelJackmout]

It seems to be cool enough to rip off all the shit they've put in the studio...

Tell me about it, how does it sound in comparison?

[davizin1]

cara, tu é brasileiro?

to com um projeto de fazer um amp de guitarra valvulado. você já fez?

[celticart]

Neat!

[dealio82]

test this amp with the Eagles Long Road Out of Eaden to test your bass

[nicoptw]

Why would you want to preserve the harmonic dostortion to reproduce an audio track?

[Cesarsound1]

@nicoptw

Second harmonic sounds harmoniuous to the ears, so the "harsh" digital sound (iPod) sounds more organic, at least for me.

[thecactustube]

Cool tube amp!!

[Cesarsound1]

@thecactustube

Thank you!

[donnyab]

never heard of those trannies before where are they from ?

[123ipodvids]

Ha thats pretty nice and good song too

[Cesarsound1]

@123ipodvids

Thanks for your comments and watching!

[UNIVERSITYHI]

Nice, goes to eleven!

[Cesarsound1]

@UNIVERSITYHI

Thanks for watching!

[49kasey]

That is a sweet little amp and you did a beautiful job. I wish I'd been hip to SE amps when I was a kid back in the 60's but 10% distortion wasn't appealing.

I have one question; why did you use electrolytic coupling caps instead of mylar or better? It wouldn't have cost you that much more considering what you paid for transformers.

[Cesarsound1]

@49kasey

Hi, thanks for watching. I used electro caps cause I had all them when I made the assemblage, but I am planing to replace them for better quality ones, like mylar or polyester.

[49kasey]

@Cesarsound1 One idea that I'm interested in (but I don't have a workshop) is a cathode follower OTL headphone output on a SE tube amp. There are some good AKG headphones that have a high impedance, around 600 ohms, and some Sennheisers too, I think. I've seen videos of a preamp/headphone amp called the Little Dot so it must work.

[Cesarsound1]

@49kasey

Hi thanks for comments. Connecting a high impedance headphone on cathode follower OTL configuration will work perfec.

[49kasey]

@Cesarsound1 Right. As long as you use a coupling cap. And a dummy load at the speaker out. And since the amp puts out so much power (for a headphone amp) you could possibly get away with using quite lower impedance phones. I'd welcome your feedback on that.

[Cesarsound1]

@49kasey

Cathode follower has low impedance output hence delivery relative high power. My understand is that you should use coupling caps (to block the DC) and 2 resistor forming a resistive divider afer the cap, so that the phones will not be overpowered.

[49kasey]

@Cesarsound1 Sure, that makes sense, I forgot about the resistors. Actually, the real reason for them is that headphones are so efficient that without the resistors you'll hear an incredible amount of residual noise even with the volume at minimum. But the resistors will also raise the effective output impedance, so the solution would have to be a relatively high current potentiometer per channel to fine-tune the system per headphone used. Koss made an external box that did that in the '60's.

[pacoseniores]

Sub to me!

[Cesarsound1]

@pacoseniores

Done.

[mrtubeamplifier]

HELLO MY NAME IS ANTHONY IF YOU WANT YOU SEE MY VIDEO YOUTUBE AMOLFIER YOU WRITE W307A ...ONE QUESTION WHAT IS THE TRADE MARK YOU USE OUTPUT TRANSFORMER???I WRITE FROM NORD ITALY NEAR VENICE CITY

[Cesarsound1]

@mrtubeamplifier

Transformers purchased from a company called Lynx Audio, in Rio de Janeiro - Brazil.

I've watched your video, you have a wonderful Hi-Fi amp, congrat.

Thanks for watching.

[gonetowin]

Very nice amp. Good job.

[Cesarsound1]

@gonetowin

Thank you!

[Alucardxitachi]

Nice tube amp.



[Edison1252]

Nice build. There is nothing like the warm glow of a tube.

[Cesarsound1]

@Edison1252

Hi, thanks for watching and comment !

[Cesarsound1]

Yes, thanks.

[Remboken]

It sounds live...

[throbbinnut]

I posted a video response, but my comments aren't showing up. Great job, man. Keep it up!

[Cesarsound1]

Hi throbbinnut,

Thanks for your comment!

Wonderful and well assembled your DIY Tube Amp. Clean and warm sound. I also liked your Shack. Congratulations Sir.

[ccronn]

Well done Sir...

[Cesarsound1]

@ccronn

Hi, thanks for watching.

[heurlin1980]

Dude, that sounds amazing...very warm but clean sound.

start making guitar amps and youll be a rich man.

[Cesarsound1]

@heurlin1980

Hi, thanks for the comments. I will think about your advice: start making guitar amps and youll be a rich man. (lol)

[alvarodariog1]

Cesar, it looks like the sound is very good, I have a couple of this tube..I will like to "clon" your project, could you send to me the scheme, or could you say me where I can obtain the details of the circuit??? Reagards, Alvaro

[Cesarsound1]

@alvarodariog1

Hi thanks for watching and for the comments.

I assembled this amp based on simple class A configuration, but I was improving this project, with several ideas that was in my mind and at moment I do not have the documented schematic yet. I need to do the "as built" schematic of final circuit on a electronic editor and so I will share it for the people that want to assemble a clone of this amp. Thanks.

[yach1d]

Aonde consigo um projeto desse pra fazer? Quanto sai o custo?

[Sprekitek]

That is very nice - where did U buy the xformers, and how much bias current on the anode of the output tubes?

[Cesarsound1]

@Sprekitek

Xformers purchased from a company called Lynx Audio, in Rio de Janeiro - Brazil.

Anode bias is 35mA. Anode voltage is 225Vdc.

Thanks for watching.

[fadatuberadioman]

Impressive!  Very nice job.

[Cesarsound1]

@fadatuberadioman,

Thanks for your kind words!

[maplewoodsp]

I would like to request you make a video showing your ESR capacitor tester in use. I noticed it on the bench in one of your videos. It appears to be similar in design to several on the market. I realize I need one. :)

[Cesarsound1]

@maplewoodsp,

Hi, it is my LC meter based on PIC16F84A. Very good meter. You can find the schematic of similar here:

I will post an exclusive working video soon.

[analogistheone]

No nfb? Pretty nice. How does it sound if you run vinyl thru a phono stage and then into your amp? Sounds good here, but kinda hard to tell with digital sources. Analog is my smell test of choice.

[Cesarsound1]

@analogistheone,

Thanks for watching.

Yes, no NFB. It sounds very organic to my ears with a clear mid and round bass. The digital sounds sources become more lively.

I will try to connect a turntable using a preamp and will post a new video.

Julio.

[blackcorvo]

me entusiasmei tanto que nem esperei o video acabar. só quando ouvi a 2ª musica que vi que tu é brasileiro também!

eu simplesmente adorei esse projeto, e realmente agradecerei qualquer ajuda possível com o meu.

não é minha 1ª aventura c/ válvulas, pois fiz uns testes c/ uma 6AU6 em SE, c/ saída de +ou- 1w.

mas acabou não ficando com um som bom, ficou baixo.

então queria tentar uma coisa mais completa e concreta com a ECL85, e talvez usar o falante de 10" que tenho aqui guardado.

[Cesarsound1]

Olá black,

minha recomendação é que voce use a ECL85, pois ela é bem mais potente e tem um pentodo + triodo dentro do invólucro e não é cara (AltanaTubes). Porem voce ainda precisará de um pre-amp com uma 12AX7, pois o sinal da guitarra é muito menor que o do iPod.

Outro fator importante é usar o OT correto, este eu comprei da Lynx - RJ.

Com falante de 10 fica bom, de preferencia um Celestion.

Boa sorte.

Julio.

[blackcorvo]

tenho um OT aqui de 4K7, e as válvulas que tenho são:

1x 6BZ7

1x 12AX7

1x 6AU6

1x ECL85

1x 5Y3 GT

1x OB2

mas só tenho 2 soquetes de 9 pinos que pretendo usar pra ECL85 + 6BZ7 OU 12AX7 (vou adicionar uma chave pra poder trocar entre uma válvula e outra, já que elas só tem diferença na ligação dos filamentos).

[Cesarsound1]

@blackcorvo

Voce tem boas opçoes de valvulas.

Faça a montagem. Aguardo seu video com os resultados.

[blackcorvo]

hey, i have one ECL85 here and wanted to know wich impedance should i use for the O.T., because i want to build a little guitar amp out of it but couldn't find much about any amplifier designs with this tube, only found some with ECL82...

thanks for any help!

[Cesarsound1]

Hi, the impedance of primary for the OT is 5000 Ohms.

Thanks.

[mashersmasher]

that sounds pretty good.

[GiffordMusic]

If you could whats the most amount of wattage could you make

[Cesarsound1]

The maximum power output is 4 + 4 watts RMS (4 watts per channel) in this amp. It is limited by the output configuration (single endend - class A), power limit of tubes ECL85 and the power supply.

If I had used a push-pull (class AB) output I could get 16 watts RMS, but in mono.

[Cesarsound1]

@cumesoftware,

Yes, I can help you via PM.

The math involved basically is the Ohm's Law and some power calculations.

First you need o know the wanted specifications of your amp: power output expected, the circuit topology (A class or AB push-pull), if is intended for Hi Fi or Guitar use.

[benderbuster]

Very nice!

[Cesarsound1]

@benderbuster

Thanks!

[Cesarsound1]

The EL80 is a good tube, unfortunately I only had the ECL 85 from junk box.

Actually there are some tube projects sites on the web, I am not sure about a good website because this project I did using my knowledge (technician / engineer) and reading some books about tube theory.

[gazbmw0]

cant beat valves nice work

[Cesarsound1]

Thank you!