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80W Mono Amplifier.


1. 4×10KΩ resistor 1/4W.
2. 2×2.2KΩ resistor 1/4W.
3. 1×1.5KΩ resistor 1/4W.
4. 1×1.2KΩ resistor 1/4W.
5. 2×47Ω resistor 1/4W.
6. 1×330Ω resistor 1/4W.
7. 1×330Ω resistor 1W.
8. 1×10Ω resistor 1W.
9. 2×0.33Ω resistor 1W.
10. 3×Diode 1N4007.
11. 2×Transistor 2N5551.
12. 1×Transistor 2N5401.
13. 2×Transistor BD139.
14. 1×Transistor BD140.
15. 1×Transistor C5198.
16. 1×Transistor A1941.
17. 1×Capacitor 10pF(10).
18. 3×Capacitor 0.1uF(104).
19. 1×Capacitor 1nF(102).
20. 1×Led 3 mm.
21. 1×1uF capacitor 50V.
22. 1×220uF capacitor 25V.
23. 1×4700uF capacitor 35V.
24. 1×2 pin connector base 2.54 mm.
25. 1×2 Pin Screw terminal.
26. 1×3 Pin Screw terminal.
27. 1×Bridge Rectifier GBU808.

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 80 Watt mono amplifier. This is a class AB Mono amplifier. Which can deliver up to 80 Watt RMS output at 8Ω ±32V, Test frequency 1khz. For this amplifier I used 1 pair of C5198 and A1941 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 24-0-24V 4A-5A.

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