Studio Reference Amplifier

[alex mm]

.....sorry , but missing some small heat sinks . Driver transistors and predriver will burn
Regards Alex

 

[sonal kunal]

Alex I have tested pcb made by you with this layout couple of year back and driver transistor is mounted on heatsink, mje340 and mje350 barely get warm. I did tested with 80VDC supply. one can put heatsink to be safe. nice pcb you made very compact.

 

[vedmitraa]

Is that 80-0-80 volt d.c. you tested or 40-0-40 mr. Sonal Kunal.

 

[sonal kunal]

"80-0-80 VDC" supply from my yamaha amp it has 57-0-57 VAC 10A transformer.

 

[johndaf]

Hi to all I have a question about sr 200.I made the sanken version pcb by Alex MM with one pair of 1943 5200 just for testing and with the zobel network that was included on pcb I couldn’t adjust the bias it stayed at 4.5 ma ,but without it everything was ok the amp worked to my ears very well . I also include the two 1n4007 diodes was missing from the pcb .And I must say that i don’t have an oscilloscope to make more measurements .Is that normal or not?
Thanks!!

 

[Grzegorz D]

whether bc560c can replace 2N5551?

 

[Grzegorz D]

Whether bc560c can replace 2N5551?

 

[TeHaa]

SR 200 first steps

Hi thimios,
i want to know the size of sr200 pcb for sanken output transistor that you have made.
i want to try to build this amp.
thanks

 

[TeHaa]

dear alex mm
may i know the size of sr200 pcb for sanken output
i want to make the pcb for my own, because i have 4 pairs sanken 2sa1295/2sc3264 that i never used.
i need your information

 

[alex mm]

Hi TeHaa
You can try my last PCB for Sanken transistors , size 215 mm X 80 mm
Regards Alex

 

[thimios]

Hi TeHaa
You can try my last PCB for Sanken transistors , size 215 mm X 80 mm
Regards Alex

Hi Alex ,can you give this in pdf format?
Best regards.
Thimios.

 

[alex mm]

Hi Alex ,can you give this in pdf format?
Best regards.
Thimios.

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

 

[wiljj78]

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

Thanks Alex...
Regards,

 

[vzaichenko]

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

Hi Alex, excellent PCB, as usual

Can you please also drop here a P-CAD ASCII?

 

[alex mm]

...sorry but I'm not working in AUTO CAD I have no ascii file
Regards ,Alex

 

[thimios]

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

Thanks Alex.

 

[TeHaa]

Hi TeHaa
You can try my last PCB for Sanken transistors , size 215 mm X 80 mm
Regards Alex

Thanks alex mm for the information

 

[conrongco]

Thanks alex mm for the information

SR200 layout by ALEX MM

 

[conrongco]

SR200 layout by ALEX MM ! Thank you !

 

[apexaudio]

SR200 layout by ALEX MM ! Thank you !

Nice pcb.