Studio Reference Amplifier

[vargasmongo3435]

Really nice layout sir

Regards
Juan

 

[alex mm]

....

 

[olafk]

....

indeed the solution of the champion
very nice!

regards Olaf

 

[thimios]

....

Please post this in black&white

 

[alex mm]

PCB all files ....

OK no problem .....
Regards Alex

 

[still4given]

Do you have a non mirrored foil for those of us who use an iron?

 

[alex mm]

.....yes I have ,just posted ..... think have you open the files ?
Regards Alex

 

[still4given]

Sorry, didn't look closely enough. Fooled by the title.

Thanks

 

[thimios]

OK no problem .....
Regards Alex

Ok,Thank you pcb doctor!

 

[apexaudio]

OK no problem .....
Regards Alex

Thank you for this files,
Regards

 

[thimios]

SR200

What pcb ver.is this?

 

[apexaudio]

What pcb ver.is this?

alex mm can answer

 

[still4given]

Hi Mile,

I am building this right now. How critical is the 4K4 at R7/8, R9/10? Can I use 4k7 there instead? Also, what other IC chips can be used for the servo?

Thanks, Terry

 

[apexaudio]

Hi Mile,

I am building this right now. How critical is the 4K4 at R7/8, R9/10? Can I use 4k7 there instead? Also, what other IC chips can be used for the servo?

Thanks, Terry

Use any value from 2k2/2W to 4k7/2W... for +/-50V rails I sugest 3k3/2W.
For DC servo many IC chips can be used: TL071, TL081, LF356...
Regards

 

[duyminh1984a]

....yes of course , why not , here in attachment are all files for toner transfer metod
Regards ,Alex

What you have gerber file for my sr200 apply to Sanken v3.2.
Regards.

 

[alex mm]

....sorry the gerbers files for SR200 v3.2 are not available .... I have send you private message ! I have a bug in program and generate gerbers with errors , this is the problem .
Regards ,Alex

 

[duyminh1984a]

....sorry the gerbers files for SR200 v3.2 are not available .... I have send you private message ! I have a bug in program and generate gerbers with errors , this is the problem .
Regards ,Alex

thank you very much Alex could give me a layout file is not sorry to bother you because I am not proficient in layout.
Regards,Duy Minh

 

[thimios]

....sorry the gerbers files for SR200 v3.2 are not available .... I have send you private message ! I have a bug in program and generate gerbers with errors , this is the problem .
Regards ,Alex

Can we see this in pdf or jpeg? Is this posted somewhere in this thread?

 

[desertstorm]

...... sorry , was modified so many times ..... forget to make connection but the silk screen it's the same . In the post#707 it's correct ......

Alex.

sir alex and all diyers i need your help pls. i build 1 pair of S200 rev.3.1 but i encounter the same problem. the 10 ohms 2 watts resistor next to the inductor coil SMOKE comes out sir too hot...pls. help. i powered +/-42 volts DC SIR. MORE POWER AND GOD BLESS..

 

[thimios]

sir alex and all diyers i need your help pls. i build 1 pair of S200 rev.3.1 but i encounter the same problem. the 10 ohms 2 watts resistor next to the inductor coil SMOKE comes out sir too hot...pls. help. i powered +/-42 volts DC SIR. MORE POWER AND GOD BLESS..

Hi desertstorm.
Remove fuses.Replace them with 2 resistors. 10-22R.
Power PRIMARY side of transformer via 220v lamp.in series.
If the lamp glow remove the power cord and examine all the circuit for wrong placed parts or short circuits .
If lamp is dark you are on the right way.
Measure voltages on test resistors(these in place of fuses)you must see low voltages about 2v or something about it.
If you see high voltages ,something like 5v there is a problem.You must examine for faults again.
Suppoce you measure 1-2v.Measure amplifier out ,you must see 0v d.c or something as 20-100mv d.c.
If you measure 42v you have a problem.
If you measure 0v or 20-100mv d.c measure again but for a.c volt .
If you measure any A.C volt here(without any inp.signal)your amplifier oscillate
Hope these are usefull.