Dx Blame ST - Builder's thread - post pictures, reviews and comments here please.

[zeraphine]

Thanks for the Courage carlos, I will re trace the whole pcb and check everything again, I know I might have made a mistake somewhere, or some component is defective, will find out, Ill send you those photos soon carlos, If you have time then you can take a look, will post my findings here, so anyone else who have this problem can correct it

thanks a lot
Regards
Zeraphine.

 

[destroyer X]

Good!....will be helpfull for everybody!....this is the spirit!

regards and good luck!

A movie for you:

YouTube - Carlos Eugênio - Dx Blame

 

[zeraphine]

nice movie carlos

regards and good luck!

A movie for you:

YouTube - Carlos Eugênio - Dx Blame

thanks and have a nice day

zeraphine.

 

[destroyer X]

Transformers under load..... a study of the basics about transformers under load

Was made in Portuguese... and have two parts... this is the first one:

YouTube - Transformadores em carga - Parte 1

Image may talk by itself and even not understanding the language you may understand what is going on observing.

regards,

Carlos

 

[destroyer X]

Transformers loaded...in portuguese, part 2

YouTube - Transformadores em carga - Parte 2

regards,

Carlos

 

[destroyer X]

Inspecting the Dx Blame ST powered using a 27 volts transformer

Scope images and set up shown..... in portuguese language...maybe will be interesting to you...image talk by itself:

YouTube - Inspecionar no Osciloscópio - parte 1

YouTube - Inspecionar no osciloscópio - Parte 2

This was made to the Brazilian forum, but even not listening the audio you will understand.

regards,

Carlos

 

[destroyer X]

Only to inform you the progress in the Brazilian forum

this was made in portuguese, so, you may understand partially:

YouTube - Amplificador DX Blame ST
YouTube - Placa de proteção para alto-falantes
YouTube - Surto de Corrente

Latin root languages, as spanish language people, and of course our brothers from Portugal will understand...also the South American spanish language countries....there is a place in Indonesia that also speaks portuguese.

We are reaching 100 kits sold inside the group buy.... the amplifier is the Dx Blame ST.

regards,

Carlos

 

[zeraphine]

Hello Carlos and All,

so it seems that cleaning all the solder flux is Very very Important (As pointed by Carlos to me), the problem I had with the 100R resistance getting really hot on the negative rail completely vanished after I thoroughly cleaned the board using a contact cleaner, thanks for all the help Carlos my friend, I will build the other amp now, hope you got the images I sent you,
Have a nice day my friends

Regards
Zeraphine

 

[destroyer X]

I have just found your images..many thanks my dear...good ones!

I am happy you are happy..that you've found the trouble ...yep...board cleaning is important... create problems after cleaning to solder once again.... no flux no good solder and you have easy shorts..the solution is to spray WD40 into the board to solder...and when finished, remove with alcohol or Kerozene (aviation fuel)

regards,

Carlos

 

[destroyer X]

Zeraphine is from Sri Lanka...here you have his pictures mailed to me

attached,

regards,

Carlos

 

[destroyer X]

Zeraphine pictures...the camera is Nikon D60

I have reduced pictures size from 1.5 megabytes to something smaller (from 200K to 500K)..also removed noise.

regards,

Carlos

 

[destroyer X]

Video im portuguese...DC in the output line, clipping,

audible effect of clipping:

YouTube - DC na saída, distorção por ceifamento

Carlos

 

[zeraphine]

DX BLAME ST Tested, Smiply Amazing

Dear Carlos, I have just tested the Amp with a speaker and its just amazing, it is dead quite, one of the quietest amplifiers I have ever built or heard, you cant hear anything even if you press your ear in the speaker, the quality of the Bass is amazing, very very punchy, highs are crispy not harsh at all, mids are just right, and even with a 25VDC supply its ear bleedingly loud, amazing amp carlos, cant wait I built the other one and put it all together, heres a picture of me testing the amp.

 

[destroyer X]

Yeeesssss!...this is exactly what i perceive...the amplifier

Is just awsome..... i am deeply impressed that i could do something so good this way....there are moments that i do not believe i did!

Thank you...prepare yourself to dance while listening in stereo....yeah...you gonna move your body man!

Strong emotions in your life.

regards,

Carlos

 

[destroyer X]

Remove the preamplifier and you will listen the sound of heaven

Pre amplifiers are not needed...they use to destroy quality....with rare exceptions.

remove it!....you gonna thank me for that.

regards,

Carlos

 

[destroyer X]

100 kits sold in the Brazilian forum.... i think they will start a new group buy

in this same year...because some of these guys are shy and will wait others to make first.... watching others doing, then they will have courage to assemble too.

I have invited a Brazilian, that belongs to this forum, to open a group buy here...he said will first finish Brazilian group, and after, if he feel interest here, then he will open here too.

So, the ones are interested must let me know.... collecting a list of names the one may decide to open a group buy here.

The list will help him to decide...so.... write me saying about your interest to have boards provided by a group buy, here in this forum.

carlos.eugenio1951@yahoo.com

This is not your obligation...say... you have not to enter the group buy.... i wanna know only about your intention... this will allow me to calculate how many guys may want...as 50 percent usually give up, or produce boards, etching them at home (much better... a real diyer)

We have better price here...but i think boards should be adapted to International price...should cost less..but not too much... depending we will arrange boards provider, factories that ask more money for these boards to match international price.

I do not want to compete in a non decent way..if boards enters with a very low price here, then no other one will be able to sell boards anymore , not only in this forum but nowhere if people knows can buy in so cheap way...you know..i do not want to create a monopoly because of price... i want people that come to the Dx Corporation by other reasons than low price.

Our cost is smaller...you see...these 100 kits was costing (cost price) 32 USD to each one (boards included listed below in this same message)..... inside brazil we can put in an envelope and the mail cost, internal registered (guaranteed) letter cost 5 bucks...so..they may have an entire kit by 37 USD.

Well... this is criminal...no other one will compete...and i do not want to be alone providing these things... i want everybody working, producing and seeling boards...no only my group of people.

The kit includes:

2 amplifier boards, solder mask and silk screen...fiberglass boards.
2 Supply boards (they will use two transformers, two supplies)
2 Protective boards...one to each channel
1 Surge protective board... to AC insertion delay with series NTC protection and relay

You see... a smashing kit...no one can compete...so...or we gonna make bigger boards (more expensive) or find someone that ask more money for these boards (other factory).... if we do not succeed, them we gonna put overprice, and use this over price to buy boards to offer, for free, to key persons in our forum...moderators for instance and some important people that will help to promote.

Amplifier board was made watching Todd Johnson Board layout.... a copy..and some parts had moved to fill empty spaces ...but basically, it is the safe and tested Todd Johnson's board...was assemble to test, of course...you see it is not very large... more squared, less rectangular.

regards,

Carlos

 

[destroyer X]

Only for your eyes.... i said them not to offer boards to the International

communitty, unless a Brazilian open a group buy here..to make things obbeying the rules.

This is only to inform you what is going on.... to motivate you to inform your interest.

regards,

Carlos

 

[destroyer X]

I have not found the protection board layout.

Here you have the link to the Brazilian group buy...now closed to receive orders..and will not accept orders from strangers.... i will check this stuff with forum management...what they think about, and then i may take different directions and different decisions about.

DiyAudio.com.br: DX Blame ST

Protection schematic is attached below...it is a circuit used in some professional amplifiers Made in Brazil... this one adapted, modified by Nabuco, also assembled and tested.

I will produce video "Assembling the Dx Blame" that will be published in the youtube... in portuguese..for Brazilian communitty.

There are some folks in Brazil that has not all that practice assembling audio amplifiers.

regards,

Carlos

 

[niss_man]

Brazilian Interconnect Diagram

Hi Carlos. Can you check if this is ok. I have been reading up on how to connect the amplifier together. I will be using a single 300va torroid and a powersupply with 40000uf capacity. Is this the correct method to connect amplifier together?

Regards

Simon

 

[destroyer X]

Yes Simon...of course i can...will take a look

then will take a nap, because now it is early morning here (03:30 AM) and latter will comment.

regards,

Carlos