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100+100W Compact Amplifier.


1. 4×10KΩ resistor 1/4W.
2. 4×4.7KΩ resistor 1/4W.
3. 4×100Ω resistor 1/4W.
4. 2×220Ω resistor 1/4W.
5. 2×12KΩ resistor 1/4W.
6. 2×20KΩ resistor 1/4W.
7. 1×1.5KΩ resistor 1/4W.
8. 2×330Ω resistor 1W.
9. 4×0.22Ω-0.47Ω resistor 5W.
10. 6×Diode 1N4007.
11. 1×LED 3 mm.
12. 4×Transistor BD139.
13. 4×Transistor BD140.
14. 4×Transistor 2N5551.
15. 2×Transistor 2SC5200.
16. 2×Transistor 2SA1943.
17. 2×0.001uF(102) capacitor 50V.
18. 2×10pF(10) capacitor 50V.
19. 2×0.1uF(104) capacitor 50V.
20. 2×1uF capacitor 25V.
21. 2×220uF capacitor 25V.
22. 1×3 pin connecter base 2.54 mm.
23. 1×Bridge Rectifier GBU808.
24. 1×3 pin screw terminal.
25. 2×4700uF capacitor 50V.

License:- ©Technical Mriganka. You can't use this PCB Layout and Gerber File for commercial purpose. You can use this PCB layout and Gerber file only for Educational and DIY projects.

PCB Layout & Schematic:-

Lets Build This Amplifier

Hello Friends, in this post I make a 100+100 Watts stereo amplifier. This is a class AB stereo amplifier. Which can deliver up to 120 Watts RMS output at 4Ω ±38V and 70 Watts RMS output at 8Ω ±45V, per channel. Test frequency 1khz. For this amplifier I used 2 pair of 2SC5200 and 2SA1943 Transistor. For designing my PCB, I used EasyEda online software. Then I export the Gerber file (which you can download). And then I go to for manufacturing my PCB. PCBWay are the largest PCB manufacturer in China. They offer Standard PCB, Advanced PCB, Rigid-Flex PCB, SMD-Stencil and PCB Assembly Service. Here you get, 100x100mm 2 Layer PCB only at $5, And processing time within 24 hour. And they distribute, worldwide. The more you order, the less price you have to pay.

You just need to upload the Gerber File, and select the quantity, color, silkscreen, thickness etc. Then select your country, and shipping method and then Pay. PCBWay will deliver your PCB within 7-10 days.

After one week I have received my PCB. You can see the PCB quality, it's awesome. I have ordered Red PCB. But you can choose your PCB color. PCBWay provide total 9 color solder mask - Green, Blue, Red, Purple, Black, White, Yellow, Matte Black and Matte Green. On PCBWay you can get 100x100mm 2 Layer PCB only at $5. Maximum size PCB you can get 500x1100mm. And maximum Layer is up to 14 Layers. And If you order PCB first time at PCBWay, then you get a $5 discount coupon. So upload your Gerber today and get best quality PCB.

Testing Method After Complete This Amplifier

Series light test:- After complete this board don't forget to series light test. When you will on this amplifier via series light, it glow for some time (1 - 2 sec). Then series light will turned off fully. If the series light will fully turned off, then check the voltages.

Check Voltages:- Bias volt 0.5V to 0.7V. Check Speaker Output and Audio Input voltage. Here you get no voltages 0.00V. If you get same voltages, then connect preamplifier to input and connect speaker to output.

Power Supply:- Recommended transformer 18-0-18V to 30-0-30V 5A-6A.

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