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Old 26th December 2009, 08:13 AM   #111
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Default Will try your suggestions Eva, also Ultima suggestion too

The VAS emitter was already supressed.... will try..thank you very much.

regards,

Carlos
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Old 26th December 2009, 08:14 AM   #112
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Default Here is the schematic....updated

attached,

regards,

Carlos
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File Type: pdf DX Blame ES schematic TAJ.pdf (154.8 KB, 173 views)
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Old 26th December 2009, 08:46 AM   #113
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I wonder how someone could understand from my explanation that I was recommending to suppress the 2.2 ohm emitter resistor from the VAS...

I was complaining that the forced gain was too high

The kind of mistake that tells a lot of things
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Old 26th December 2009, 09:10 AM   #114
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Default 100 respectable kisses for you dear Eva

You fixed!

Soon i will provide fixed schematics...no more overshot, pure square wave, full power till 20 Khz.

distortion is even lower now.

Almost all your suggestions were used, not all, but the ones fixed.

The output inductor is now 1 microhenry.

You are very good Eva.

My deep respects and congratulations.

regards,

Carlos
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File Type: jpg THD.jpg (32.9 KB, 392 views)
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Old 26th December 2009, 09:24 AM   #115
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Default Zobel returned to the correct point, extra 27pf capacitor removed

10N capacitor removed, 22n from the phase advance system (Sansui) removed and now playing stable....but really, the phase advance has a lovely "touch" into the treble...a pitty to remove this one...well... was needed...was one from the unstabilizing factors.

regards,

Carlos
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File Type: jpg dsdsds 655.jpg (326.3 KB, 391 views)
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Old 26th December 2009, 09:34 AM   #116
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Default You see, really looks alike Doctor Self Blameless...of course

This one was based on it... assembled and tweaked for sonics.

Now you have double guarantee, the "inspiration" and the Corporation guarantee.

Also Eva revision.

With that crew.... it is easy to produce lovely things.

This is the best wide world amplifier!

You do not believe?.... good!, assemble and them come here and tell me what you perceived...previously write the list of amplifier this one have eated during the breakfast.

Sorry competition, you loose!.... wanna an advice?, do not tell folks but copy this schematic to be produced in your line.... also be more humble.... Doctor Self did that!..i have only tweaked for sonics.

Now accepting 2.2uf, the square wave is not perfect this way, but very good.

regards,

Carlos
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File Type: gif Blameless.gif (25.1 KB, 386 views)
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Last edited by destroyer X; 26th December 2009 at 09:43 AM.
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Old 26th December 2009, 11:10 AM   #117
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Default I ensure you, and i can say that because i am watching and monitoring what is going

on here.

the amplifier is more stable when the zobel is installed with the speaker, or, in the wrong technicall and traditional position.

My board is a mess..well.... was made this way to unstabilize, and it does very well such kind of things.

Measuring dc directly over the emitter resistances, the output section, and i felt it oscilated because the readings increased a lot..fast i removed the probe point and switched the amplifier off.... then i have repeated and once again...then i moved the zobel filter to the output and this finished...in my personall unit the zobel will at the output position.

I do love this amplifier, but really folks, i have not courage to suggest you to build because i can see it may be problematic depending the board, speaker or installation.

I will be selfish and will not tell you do build...will be only mine..ahahahahah!

But, other friends will use, soon we gonna have boards made by Taj, also an Orkut friend is producing boards, well, these boards will be tested and we gonna see what happens further.

Maybe my hand was touching the BD139 (VAS) colector while adjusting...i have a heatsink, and this can pick things too...do not know.... you know, touching both same time, the output line and the BD139 colector may have created that trouble.

Sounds lovely...but it is only mine!
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File Type: jpg Dx Blame ES - December 26.jpg (178.8 KB, 386 views)
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Last edited by destroyer X; 26th December 2009 at 11:35 AM.
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Old 26th December 2009, 12:51 PM   #118
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Dear Carlos,

you know:

I am one of your most loyal fans concerning audiophile-sounding AMPs and since I built your DXAMP I will not try anything else that does not originate from the DX Corporation.

Click the image to open in full size.

The DXAMP (in its wooden enclosure on the right side of the workbench) is already sounding so mature, smooth, full of emotion, crisp, direct ...

The most beautiful bass fundament I ever heart!
It can absolutely compete with any other AMP I ever listened to!

It is playing: ... divine .

I made a lot of mistakes concerning the mechanical construction of your DXAMP resulting in a lot of wires going back and forth and lots of little
PCBs mounted eyerywhere in the case (your DXAMP was my first DIY - piece: but a real success) - so I wanted to optimize it, ..., make it "professional" .

I followed your thread concerning the DX Blame ES, read about it burning down, read about EVA's intervention and your breakthrough!

Go on with the Blame ES, the most beautiful AMP of the world!
I will build this one, for sure, ... I already ordered parts (SANKEN) for it ... and ... big wish of mine: I would join the DX Corporation:

CARLOS: Technical director
EVA: Technical assistant and revisor
TAJ: Art director
...
RUDI: BOM director


Best regards and have a nice Christmas - Rudi_Ratlos

Last edited by Rudi_Ratlos; 26th December 2009 at 01:10 PM.
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Old 26th December 2009, 01:15 PM   #119
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Default You are already in the Hall of fame of our Corporation

In the headquarters, already exists your photograph in a frame.

Executive member, BOM expertise.

ahahahahah!

Thank you very much, you are very welcome to the crew dear Rudi.

Carlos
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Old 26th December 2009, 01:36 PM   #120
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I appreciate being in your crew.

Go ahead - make the Blame ES being the best sounding AMP ever .

Rudi_Ratlos (DX Corp. BOM director)

Last edited by Rudi_Ratlos; 26th December 2009 at 01:39 PM.
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