Dx Blame Supercharged MKIII (three)

destroyer x

Compulsive builder
Yes, the board is nice dear Alex mm

Thank you.

Well Yosemite, seems he tried to avoid the long strip we usually make when we have a lot of power transistors... installing both sides we reduce the length and this results in a more squared board in the place to be rectangle and very loooong.

I do think both layouts are fine.

regards,

Carlos
 

evette

New member
:"::Hello Mr.Carlos Sir,,Can you tell everybody when the boards will be ready,,PLEASEEEEEEEEEEEEEEEEE.:w)
 

destroyer x

Compulsive builder
I do not know dear Evette.... after july 15th we gonna start to move.

This question should be made to Microsim, he will be the owner of this design and he will decide these details.

If you understand Portunhol, a [video=youtube;EM43LFDNXsQ]http://www.youtube.com/watch?v=EM43LFDNXsQ[/video]mix of Portuguese and Spanish, then watch the attached video please.

regards,

Carlos
 

destroyer x

Compulsive builder
MKIII prototype assembled and tested...schematic is fine

Anything need to be changed or tuned or tweaked....this is a low power test...soon i will produce the high power test too.

regards,

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

destroyer x

Compulsive builder
MKIII was submited to high power testing using a 550VA supply

55 plus 55 volts supplies.... i have not stronger supply, so, testing must be made this way..scope is damaged too (SMPS supply to the Cathodic Ray Tube).

Measurements where made using resistive loads and multimeter..this is not precise, but can give us an idea...power simulated is shown in the attached chart.... and real power measured (with 550VA supply, or weak supply) is show in the video and also in the chart to 1.1 ohms, 2.7 ohms and 7 ohms while playing music from MP4 player.

Video explains details about.

regards,

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

Attachments

  • Simulated power versus 550VA supply power.jpg
    Simulated power versus 550VA supply power.jpg
    90.1 KB · Views: 35
  • Final resistance and adjustments for bias.jpg
    Final resistance and adjustments for bias.jpg
    33.5 KB · Views: 64

destroyer x

Compulsive builder
If you want to etch your boards at home, here you have images

These images was provided by Alexabdru from Rumania (Alex mm)

regards,

Carlos
 

Attachments

  • DX MKIII ALL TOP (1).pdf
    150.1 KB · Views: 388
  • DX MKIII MIRROR (1).pdf
    42.3 KB · Views: 312
  • DX MK III NORMAL (2).pdf
    42.3 KB · Views: 311
  • MKIII, disposição ds componentes.jpg
    MKIII, disposição ds componentes.jpg
    21.1 KB · Views: 119
  • MKIII, imagem espelhada, layout.jpg
    MKIII, imagem espelhada, layout.jpg
    21.2 KB · Views: 82
  • MKIII layout da placa 1.jpg
    MKIII layout da placa 1.jpg
    20.9 KB · Views: 70

destroyer x

Compulsive builder
MKIII specifications from simulator and power supply requirements

The video explains.... there are two parts, i am posting the first one.

regards,

Carlos[video=youtube;y7ijKcF0UIM]http://www.youtube.com/watch?v=y7ijKcF0UIM[/video]
 

destroyer x

Compulsive builder
Here you have the final part, second part or part two

regards,

Carlos[video=youtube;g9H1SeojqLE]http://www.youtube.com/watch?v=g9H1SeojqLE[/video]
 

destroyer x

Compulsive builder
Dx Blame MKIII is now MKIII Hx or call it Hx to be simple

Was upgraded and updated and i will publish here, for a while, only schematic...more details published in the www.diyaudio.com in the solid state section.

I am short in time..will put details here in he future.... Alex mm will provide you new boards and new layout in black and white to etch.

This amplifier cannot operate in 1 ohm anymore, had special sonics, awsome clarity, low distortion, high speed and wonderfull dinamics...can put out more than one kilowatt to each channel but distortion in this case jumped to 10 percent.

Low distortion specification is 200/340 and 500 watts and speaker impedance is 8/4 and 2 ohms while distortion is 0.008 % THD

regards,

Carlos
 

Attachments

  • Dx Blame MKIII Hx.pdf
    109 KB · Views: 371

destroyer x

Compulsive builder
A complete schematics showing all output transistors

And more images explaining the modifications made.

regards,

Carlos
 

Attachments

  • Input capacitor.jpg
    Input capacitor.jpg
    85.4 KB · Views: 106
  • Power specifications 1.jpg
    Power specifications 1.jpg
    21.9 KB · Views: 91
  • Model name...the upgraded model MKIII - Hx.jpg
    Model name...the upgraded model MKIII - Hx.jpg
    89.7 KB · Views: 86
  • Hx was assembled, was tested.jpg
    Hx was assembled, was tested.jpg
    218.3 KB · Views: 120
  • New stand by current.jpg
    New stand by current.jpg
    112.9 KB · Views: 87
  • Dx Blame MKIII Hx.pdf
    110.1 KB · Views: 257
  • Power specification to 2 ohms loads.jpg
    Power specification to 2 ohms loads.jpg
    139.1 KB · Views: 84
  • Main modifications.jpg
    Main modifications.jpg
    125.4 KB · Views: 78
  • Warning.jpg
    Warning.jpg
    45.8 KB · Views: 62
Last edited:

destroyer x

Compulsive builder
Here a sample from the MKIII Hx

A hair raising amplifier...the slew rate, the treble attack, dinamics are excellent....here you have a sample that is unable to make justice to the audio quality, as my digital camera is not able to record high frequencies, nor dinamics and also deep bass is not perfect.

regards,

Carlos[video=youtube;rLa4gtyxh6g]http://www.youtube.com/watch?v=rLa4gtyxh6g[/video]
 

destroyer x

Compulsive builder
MKIII Hx was tested using simulator

And here you have it.

regards,

Carlos[video=youtube;3ycPqK_9_R4]http://www.youtube.com/watch?v=3ycPqK_9_R4[/video]
 

destroyer x

Compulsive builder
I am building another MKIII Hx to my ex wife

She wants to listen her old Italian songs.

regards,

Carlos
 

Attachments

  • MKIII Hx.JPG
    MKIII Hx.JPG
    155.2 KB · Views: 66

destroyer x

Compulsive builder
One more MKIII Hx will be soon playing.

regards,

Carlos
 

Attachments

  • Bb.jpg
    Bb.jpg
    259.9 KB · Views: 91
  • Aa.jpg
    Aa.jpg
    92.8 KB · Views: 75

destroyer x

Compulsive builder
More images from the MKIII Hx, home customized unit, handmade

to operate only with 8 ohms loads (200 Watts RMS)

regards,

Carlos
 

Attachments

  • Angle.jpg
    Angle.jpg
    198.5 KB · Views: 57
  • Nail polish.JPG
    Nail polish.JPG
    223.4 KB · Views: 54
  • Placa diagonal.JPG
    Placa diagonal.JPG
    262.1 KB · Views: 62
  • Poor man silk screen.jpg
    Poor man silk screen.jpg
    178 KB · Views: 48
  • Silk detail.jpg
    Silk detail.jpg
    168.4 KB · Views: 39
  • Placa por baixo.jpg
    Placa por baixo.jpg
    85.7 KB · Views: 45

destroyer x

Compulsive builder
Assembled and playing

regards,

Carlos[video=youtube;yM8xgM33zwA]http://www.youtube.com/watch?v=yM8xgM33zwA[/video]
 

destroyer x

Compulsive builder
My MKIII Hx, my home edition.... ready!

regards,

Carlos[video=youtube;eVQMkmc3rUU]http://www.youtube.com/watch?v=eVQMkmc3rUU[/video]
 

Attachments

  • MKIII home edition ready.JPG
    MKIII home edition ready.JPG
    217.5 KB · Views: 30
  • Thermal sensor and bias transistor.JPG
    Thermal sensor and bias transistor.JPG
    129.6 KB · Views: 32
  • Ready.jpg
    Ready.jpg
    187.1 KB · Views: 31
Last edited:
Top