The best amplifier i have ever listened too..i am glad to present you the Dx Blame

[alex mm]

Total same opinion ...... I love and I have built Dx amplifiers , great sounding , powerful .......
Alex.

 

[destroyer x]

Thank you by the kind support...thank you Alex by the wonderfull pcboard

And also Byron and Meanman that runned group buy.

Here is a video, dedicated to my people.... a version of the already published video(last one published)..audio for Brazilians.[video=youtube;vt5e7pITIdc]http://www.youtube.com/watch?v=vt5e7pITIdc[/video]

regards,

Carlos

 

[niss_man]

My Blame ST will always be one of my favorite amp.

Same with me. It has a special place in my heart because it was the first amplifier I have ever built. It also helps that it sounds "Delicious".

Regards

Simon

 

[thiago alves]

How to build a transformer to Blame ST, totally DIY
Hola people, I will show the construction of my transformer 27Vcc 27Vcc 7.5A + to connect my Blame ST
input 220Vcc 419 turns of AWG19 wire
01 Secondary 27+27Vcc 7.5A - 51 + 51 turns of AWG13 wire with center tap
02 Secondary 0+9Vcc 2A - 17 turns of AWG19 wire
600 grams of 19 AWG wire and 800 grams of 13AWG wire
go ahead

Reel of 49mm X 45 mm 4 kg plates

Lack of varnish to give a bath to isolate

checking the voltage CC "The voltage varies slightly according to the input current of the power line"

checking the voltage DC

Sorry for not posting more pictures so I can post 4 photos by topic

Flw!!!

 

[thiago alves]

Blame ST playing O Barbeiro de Sevilha - Orquestrado.
[video=youtube;Gg6RqOuyKAQ]http://www.youtube.com/watch?v=Gg6RqOuyKAQ[/video]
flow !

 

[niss_man]

That home made transformer is very impressive Thiago.

 

[destroyer x]

We use to do this way Simon...to build our own transformers

I do use transformers that already have primary..then i build a new secondary...seems Thiago is more skilled.

regards,

Carlos

 

[thiago alves]

That home made transformer is very impressive Thiago.

Yes it is! transformer blew very early learn right up! I learned everything on the Internet

I do use transformers that already have primary..then i build a new secondary...seems Thiago is more skilled.
regards,
Carlos

hehe was just what I did with this transformer! he had an output of 33 + 33, so redid the calculations for the output of 27 +27 and put more of a secondary 0 +9

hehe foi justamente o que fiz com esse transformador !!! ele tinha uma saida de 33 + 33, so refiz os calculos para a saida de 27+27 e coloquei mais um secundario de 0+9


regards,
Thiago alves.

 

[thiago alves]

esse qui e o meu blame ST que passou em todos os teste !!! estou esperando chegar os gabinetes !!!
My DX blame ST that passed all the tests! I am hoping to get the cabinets!
[video=youtube;Uw-_iql-q00]http://www.youtube.com/watch?v=Uw-_iql-q00[/video]

flow !

 

[mobenaus]

Another dx is working

This week I had the first channel of MKII Supercharded working...

[video=youtube;_1NwEiz8fn8]http://www.youtube.com/watch?v=_1NwEiz8fn8[/video]

[video=youtube;2-o3zQNoHfk]http://www.youtube.com/watch?v=2-o3zQNoHfk[/video]

This weekend I will build the other channel.

Amazing sound!!!


Mauricio

 

[destroyer x]

Nice Mauricio...thank you

Well folks...join us and build a Dx amplifier you too.

regards,

Carlos

 

[thiago alves]

a small update, now sinks.

flow !

 

[destroyer x]

Dx Blame series ... Excellence in DIY audio amplifiers

E[video=youtube;uk6ZbeiwDqU]http://www.youtube.com/watch?v=uk6ZbeiwDqU[/video]njoy.... it is for free.... you build and become happy instantaneously!

regards,

Carlos

 

[giololucas]

a small update, now sinks.

flow !

What a big heathsink!

 

[thiago alves]

What a big heathsink!

tem 150mm X 70mm, são dissipadores de calor de CPU, alumínio 64, tem uma ótima troca de calor.
o amplificador fica ligado por 2 horas com o volume na metade e a temperatura não passa dos 50°C

flow !

 

[giololucas]

Bump in start

Dear Carlos.
Could you help me with your knowledge? May be this is an doubt of other people too...

Most amplifiers I have built have an common problem, when I turn it on I hear a bump in the speaker.
After measurements, all results are quite equal, the reason of bump in the loudspeaker is dc unbalance in the output of amplifier at startup. Doesn´t matter what kind power supply I used.

Is there anyway to correct it without using relays at power output?
There is an example I built many years ago that has this problem. Amp is still working nice in my brothers car.

Thank you.

 

[thiago alves]

Dear Carlos.
Could you help me with your knowledge? May be this is an doubt of other people too...

Most amplifiers I have built have an common problem, when I turn it on I hear a bump in the speaker.
After measurements, all results are quite equal, the reason of bump in the loudspeaker is dc unbalance in the output of amplifier at startup. Doesn´t matter what kind power supply I used.

Is there anyway to correct it without using relays at power output?
There is an example I built many years ago that has this problem. Amp is still working nice in my brothers car.

Thank you.

what you say and the PUMP to connect the amplifier, have a video that Carlos talks to this effect.
I will try and send you!!!

 

[giololucas]

what you say and the PUMP to connect the amplifier, have a video that Carlos talks to this effect.
I will try and send you!!!

Ok Tiago
Thank You.
Valeu.

 

[destroyer x]

This power on "thump" sound, or "bump" in our language

is due to time constants about charge or electrolitic condensers we have in the circuit...this is because current that feeds a condenser...for instance, if you have a 12 volts regulator..from the main voltage that powers your unit, to the input, or an integrated circuit input circuit, then you will have a resistance that feeds the series pass regulator...this resistance (from base to colector) charges an electrolitic condenser..this takes time..and while this happens the output circuit is unballanced, all circuit is charging and voltages is reaching the stability..while the circuit is going to stabilize it shows you a variable DC voltage in the output...this variable voltage will decay till the stable point that is a couple of milivolts...when this happens you will see the speaker moving and the power on thump will be heard.

Isso acontece como consequencia dos tempos de carga dos condensadores eletrolíticos que temos no circuito.... é por conta da pouca corrente que é fornecida ao condensadores e que por isso elevam sua tensão (carregam se) devagar, e a voltagem nos extremos aumenta devagar.... isso cria uma instabilidade, já que esses circuitos de reguladores em serie (tens um no chip de entrada para 12 volts no teu circuito) temos resistencias do coletor para a base que carregam um eletrolítico que está na base...esse cara carregando devagar vai subindo a tensão devagar..isso leva tempo, alguns milisegundos,.... durante esse tempo o amplificador como um todo vai tentando achar a estabilidade das suas tensões internas.... enquanto estabiliza e carrega seus proprios eletrolíticos que fazem parte do amplificador a tensão de saída varia muito até estabilizar em alguns poucos milivolts..quando essa tensão de saída varia, ela move o cone e produz o ruído de frequencia muito baixa, um Thump ou Bump que você ouviu.... até que tudo estabiliza e vem o silencio..tudo acontece em milisegundos e volta ao normal após os milisegundos.

Pouco existe que se possa fazer.... de repente reduzir o valor de certas resistências para reduzir o tempo de carga, reduzir o valor dos condensadores (pode reduzir a filtragem e eficiência também)..enfim...reprojetar os circuitos... refazer tudo.

Apesar que gosto de ajudar, o assunto aqui são amplificadores Dx, eu não gostaria de mexer com outras unidades que não são de minha responsabilidade e interesse..gosto de ajudar sim...mas isso é pergunta pra fazer pessoalmente para não divergir do tema e topico desse forum.

abraços,

Carlos

 

[destroyer x]

Power onj noises when you have modified Dx Blame ST amplifier

[video=youtube;YPsQ9xfpWR4]http://www.youtube.com/watch?v=YPsQ9xfpWR4[/video]