Studio Reference Amplifier

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#701
JOHN BALI said:
Ok, mas Jofual.
this is the pdf for toner transfer.
PCB size is 68mm x 200mm (saya kecilkan sedikit)
& you must set "mirror" setting on the printer.

Do have a laser jet printer?
I don't have & tried photocopier but not good, I end up with "spidol" permanent again 😀 . I will try another way to make PCB.

No component value!
You must find by your shelf where is component value,
because I usually not make it.
I like PCB without silkscreen 🙂

There also .pcb file, but I rename it to .txt
you can try open it with ExpressPCB after rename it again
Enjoy ...
Click to expand...

Hi mr John... now I already put all component value.... please you check are all the component value write corectly..?
 

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#702
JOHN BALI said:
Hi all, thanks to apexaudio for great schematic...

Finally I made SR200 with same value with schematic, here some pictures
(but sorry picture is not good quality)
I use 220nF/63V on VBE & 100pF/100V on colector of the driver transistor
because that what I get here, so what is the maximum voltage that I can use?

Regards
Click to expand...

The first design, megusta more. :superman:
you could also upload all your data. 🙂
thanks.
 

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#703
jofual said:
Hi mr John... now I already put all component value.... please you check are all the component value write corectly..?
Click to expand...
Quick action... 🙂
Use 2 x 0.68R/2w not 2 x 0.33R/2w.
I use 1 x 0.33R/5w on my build.
Next I will try 2 x 0.68R/2w & the position is in reverse each other to minimize the inductance, maybe...
thats what I'm thinking.

@SERGIODS,
sorry I don't have with component value...
better this new layout 🙂
 
#705
JOHN BALI said:
Quick action... 🙂
Use 2 x 0.68R/2w not 2 x 0.33R/2w.
I use 1 x 0.33R/5w on my build.
Next I will try 2 x 0.68R/2w & the position is in reverse each other to minimize the inductance, maybe...
thats what I'm thinking.

@SERGIODS,
sorry I don't have with component value...
better this new layout 🙂
Click to expand...

Ok Sir John .. this the new corect one.. and I also corection the resistor 10R from pin 3 IC to ground... thanks for share sir..😀🙂
 

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#715
alex mm said:
...... 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.
Click to expand...

Hi Alex, I have most of the parts for this amp. Can you please make the pads of Q9, Q7 and Q8 a bit bigger? really appreciated your endless efforts for making a PCB layout which beautifully executed.

BR,
Junie
 
Last edited:
#716
Hi Junie ,
It's not possible becouse are two transistors on the same heat sink and layer ....
Thanks for kindnes . One question , how many times you intend to solder and desolder those transistors you mentioned ....😕. ?
Regards Alex.
 
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