The Best Amplifier I have ever heard

[MicrosiM]

Files

Please take a look at the below files, and make sure again you have same one

compare them to the one you have built.

These files used by me to make my prototype.

click on file, then click again to view in full screen

update me please..

 

[stewin]

hi microsim pls post ure schematic with compononents name instead of numbers please. sorry for late upload but will get a camera and post the pictures of my trial asap steve

 

[MicrosiM]

hi microsim pls post ure schematic with compononents name instead of numbers please. sorry for late upload but will get a camera and post the pictures of my trial asap steve

You should follow the part number here and at parts list, this way you make sure its correctly placed

 

[nazirdigi]

hi microsim.
i am buisy last few days thats why i stopped working on this.
now i etched the pcb. see the below image.

 

[MicrosiM]

Kindly correct the error in PCB as in POST #41, I will remove old file soon.

and COMPARE it to the one in POST#41


Dont assemble before you compare.

 

[nazirdigi]

hi microsim.
can u share the post 41 pcb layout in pdf.

 

[MicrosiM]

hi microsim.
can u share the post 41 pcb layout in pdf.

here all the original files, same one I used to make my amplifier.

Hope to hear your comments soon!

Assemble carefully, check solder, check for short circuits. I know PCB is very critical

further steps we may make new pcb


Good Luck

 

[nazirdigi]

thanks microsim.

 

[nazirdigi]

hi microsim.
pls see the image.
not yet finished my sphere.
i am working on progress.
i put 11k resistors to 10k+1k in series, and 510 ohm to 330+180 in series, 51 ohm to 47 ohm.
check the led's polarity is correct or not.
i cant find 2.5k preset so can i use 3k preset.
for the mylar caps brown color or green color is good. i mean the tolerence.
what is the out coil turns and gage,diameter.

 

[MicrosiM]

Your setup looks OK to me.

Tell me what happens when you power the amplifier, at first dont plug the fuses.

Output coil is 8 ~ 10 turns 1mm wire

Mylr caps, any one with 5% 10% would be OK

 

[nazirdigi]

hi microsim .
for first powering the amp what is the procedure i have to make?
is it ok bf471,472 instead kf470,469.

 

[MicrosiM]

hi microsim .
for first powering the amp what is the procedure i have to make?
is it ok bf471,472 instead kf470,469.

You dont have to make any thing, except powering up, and if relay turn ON after 3 seconds, then you put the FUSES.

Regarding transistors, you have to check data sheets for both and compare it!

 

[nazirdigi]

hi microsim
can i use two 10 ohm/1w resistor to the fuse place to check,
how can i adjust the preset.
why is 40v one ac line connected to board.

pls rsap.

 

[nazirdigi]

hi microsim.
i connected the amp with 10ohm/1w resistor instead fuses.
after three second the relay works and led light on.
so what is the adjusment of the preset.
thanks for ur cooperation.

 

[MicrosiM]

hi microsim.
i connected the amp with 10ohm/1w resistor instead fuses.
after three second the relay works and led light on.
so what is the adjusment of the preset.
thanks for ur cooperation.

Very Good Results until now.


Idle Current values should be between 120 ~ 140ma, I assume you know how to adjust it.

Tell me if you can hear clear sound from the amplifier.

 

[nazirdigi]

hi microsim thanks for the reply.
for the adjusment dmm probes connect accross to 5w/.33 resistor am i correct.

 

[nazirdigi]

hi microsim.
i am trying to adjust the preset but not working. the idle led not lighting on.
so can u explain how to adjust and where i have to connect the multimeter probes .

 

[nazirdigi]

hi microsim .
i am sorry my power supply voltage is 47vdc. so any changes to make for properly work.

 

[MicrosiM]

hi microsim .
i am sorry my power supply voltage is 47vdc. so any changes to make for properly work.

1- You have to compare the PCB you have made with the LAST one I have posted

2- +-47VDC is OK with the amplifier, but lower power you will get

3- You should inspect your PCB, transistors directions, Solder, etc..


I dont know the exact reason for the problem, tell me if you can hear sound or not

 

[nazirdigi]

hi microsim.
i cant hear the sound. so where will be the problem?
can u tell me how to adjust the idle current.