Studio Reference Amplifier

[Karl vd Berg]

Who do print these PCBs?

 

[apexaudio]

Some nice pcb

 

[JOHN BALI]

SR200 for 2014

Some nice pcb

Yes that a nice one, but when I ask for it & he is out of stock of that PCB...

So I decide to make a new one, please check this one out

An externally hosted image should be here but it was not working when we last tested it.

this one already tested, DC offset is 1.1mV with TL071, I have LF411 but I thought TL071 is good enough
If anyone want to convert it to pdf please PM me
I have the big jpg file

 

[apexaudio]

Yes that a nice one, but when I ask for it & he is out of stock of that PCB...

So I decide to make a new one, please check this one out

An externally hosted image should be here but it was not working when we last tested it.

this one already tested, DC offset is 1.1mV with TL071, I have LF411 but I thought TL071 is good enough
If anyone want to convert it to pdf please PM me
I have the big jpg file

Nice work, thanks for this pcb design.
Regards

 

[nalindapk]

pcb size ?

 

[panggih]

Hi Mr.Mile
can i build sr200 use pcb SR V3.1 NOT PCB SR V3.2??because in SR3.1 R18=1k and C7=470pF is removed from pcb.
The difference between SR v3.1 to SR V3.2.

 

[DAMANHURI]

I also want to try and start it, thanks to my good friend Mr. John Bali
Thanks to Mr. Mile for Schematic

 

[apexaudio]

Hi Mr.Mile
can i build sr200 use pcb SR V3.1 NOT PCB SR V3.2??because in SR3.1 R18=1k and C7=470pF is removed from pcb.
The difference between SR v3.1 to SR V3.2.
View attachment 423589

R18=1k and C7=470pF can not be removed from pcb, C2=100pF also.

 

[yassud]

R18=1k and C7=470pF can not be removed from pcb, C2=100pF also.

what is the reason sir?

 

[panggih]

R18=1k and C7=470pF can not be removed from pcb, C2=100pF also.

thanks Mr.Mile,

I will complete all komponen.between the two schemes below which one do you recommend??

 

[AndrewT]

Pan,
add a variable resistor to that 18pF.

Tune the "output" with the VR and then replace with a fixed resistor once you have settled on the output stability that you require.

 

[panggih]

Pan,
add a variable resistor to the C=18pF.

Tune the "output" with the VR and then replace with a fixed resistor once you have settled on the output stability that you require.

Hi Andrew T.
Is it the function of the C=18pF to adjust dc offset?and whether i should use osciloscop order to see the changes?

 

[AndrewT]

NO !
18pF is a stability compensation component.

You must measure the amp output to know what effect the 18pF is having.
You may have to change the 18pF if you have guessed at the wrong value.
It could be that 5pF to 10pF is more suitable.
The ONLY way to find out is to measure.

 

[JOHN BALI]

PDF SR200

Here the SR200 in pdf format for easier toner transfer
PCB size is 80 x 200 mm
the good news that this one don't need any aditional compensation

 

[TeHaa]

SR200 layout by ALEX MM

Nice pcb

 

[TeHaa]

Here the SR200 in pdf format for easier toner transfer
PCB size is 80 x 200 mm
the good news that this one don't need any aditional compensation

Thanks John Bali for sharing your layout design, i can't wait to try it
And also big thanks to Mr. Mile for the schematics

 

[JOHN BALI]

1N4007 reversed

Thanks John Bali for sharing your layout design, i can't wait to try it
And also big thanks to Mr. Mile for the schematics

Ok try it & please use it as reference :

I have found the 1N4007 is in reverse at my top silk so be carefull
that the work one I build before I check all the top silk placement

Please forgive me...

 

[thimios]

Ok try it & please use it as reference :

I have found the 1N4007 is in reverse at my top silk so be carefull
that the work one I build before I check all the top silk placement

Please forgive me...

Send a message to moderator to delete wrong file then post again the right one.
Nice work!

 

[mrsavage]

Obtain the many versions of the Studio Reference Amplifiers

I would like to obtain PCB's for the various Studio Reference Amplifers, i.e.
SR50,SR200,SR500,SR800,etc. If I had the Gerbers files I could send them
to a vendor to make the PCB's. Or does any of the PCB Software,i,e. Eagle,
Sprint,etc, convert PDF files into Gerber files? That would be great.
Is anyone doing Group Buys on these PCB's? Let me know. Great Thread.

 

[apexaudio]

SR50 pcb in progres