Dx Disintegrated Circuit - Dx Dc

[destroyer X]

I have reduced to the smallest i could..... Alex made better

Here you have images.

I will proceed the etching and will build today.

regards,

Carlos

 

[alex mm]

...... I'm sorry ,have found one mistake , I have corrected and below are the right files for this amplifier .....
regards
Alex.

 

[destroyer X]

Good Alex mm .... i am glad you have found something and have fixed.

Here is a video about you:

Alexandru is the great...but this pcboard is mine - YouTube

Images attached...about my board.... Dx Home board.

regards,

Carlos

 

[alex mm]

.......I'm great but only in kg 109 ,another small error TIP 41 will be change with BD139 for correct function in my previous PCB .(base inverted with emiter) not big deal .
Now, the real and correct PCB for amplifier in attachment . Zobel filter included on PCB . Carlos you are faster then me, and your amplifier will play music soon .Thanks for video . I have to wait until next weak .......
regards
Alex.

 

[destroyer X]

Thanks Alex.... at least i am faster then you

Well...i have to beat you in something...what a ******* thing that you do always better boards than i do....Ahahahahahah

DxDc - home board edition assembled.

Will play music today!

regards,

Carlos

 

[destroyer X]

Already made.... assembled or ensanblado the way Juan say

I am still searching for insulating material to install the board into a heatsink.

regards,

Carlos

 

[norazmi]

damn small amp.. i`ll not miss this one to build . hehehehehe. So its necessary to put zobel network?

 

[destroyer X]

I am glad you like it Norazmi...when listening you will like it even more!

here you have a video about the zobel:

We have zobel, a wrong one but we have it - YouTube

regards,

Carlos

 

[destroyer X]

Herman made pcboard..... he is studying and soon we gonna have final results

He use to make while we go talking and discussing details.... we have the same language and this makes communication easier.

Not final work...he is doing....on the go for a while.

regards,

Carlos

 

[destroyer X]

Herman pcboard is not ready to go...we are studying the stuff together

Not ready....wait a little bit if you want to use Herman board..not tested too....... have a lot of jumpers and the capacitors are bigger than board (electrolitic).... this gonna be fixed..we are discussing these details.

Alex mm board was not tested also.

The only one that is being tested (for a while) is mine one.

Do yours if you want... and post it here too.

regards,

Carlos

 

[destroyer X]

Here you have fixed home pcboards..... home ones are the hand produced

sketches to make boards home style.

regards,

Carlos

 

[destroyer X]

More images that may help

Good luck folks (to the ones want to make home style pcboard)

Make yours if you dislike!....and post it here.

We have Alex mm professional quality boards...also Herman boards and we can have yours too.

regards,

Carlos

 

[destroyer X]

New boards from Herman

Improved ones.

regards,

Carlos

 

[AndrewT]

All the resistors, except the three that cross tracks, could be dual purpose SMD or through hole (TH).
Just add the smd pads. Then the builder can choose to use TH or SMD.

For those three exceptions, the smd pads could be added and a jumper across the track would do.

 

[johngalt47]

How long do you think the 9 volt batteries will last?

 

[AndrewT]

A couple of 12V traction batteries will last longer.

 

[destroyer X]

These batteries may end very fast.... i have not tested it yet

May not be approved.

I have tested the small board and worked fine:

DxDc small home board test passed - YouTube

regards,

Carlos

 

[destroyer X]

Yep... can use SMD too..no problems

I do think the power emitter resistors and the zobel resistor may be a little big bigger in size...maybe 2 watts to keep things small.

This 0.22 ohms looks good.

regards,

Carlos

 

[djk]

Amplifiers that lack emitter resistors are generally smoke generators too.

It might work OK with bias set to class B, the internal bias resistors will allow for the feedback loop to be completed. I would probably start out with about 2V bias between the pair of outputs (about one diode-drop less than class AB), and see how it goes from there.

 

[destroyer X]

This one has emitter resistors.... 0.47 ohms.

It also uses Zobel filter and output inductor, as also Miller capacitor and RF input filter too.

You said would set to 2 volts the bias... then do it and tell me your own results...you are invited to check your thoughs and share them to our community.

I have give up to make too much thoughs...i do real life tests..they answer my doubts in a very perfect way... real world tests say to me.

- "go!".... or "not go!"

I love these words together.... "go from there".... this is the base of try and error...i love that as all i have learned was a result of that.

regards,

Carlos