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250 Watt Mono Amplifier


1. 1×UA741/ TL071 IC.
2. 1×2SC2922/ 2SC5200 Transistor.
3. 1×2SA1216/ 2SA1943 Transistor.
4. 1×TIP41C Transistor.
5. 1×TIP42C Transistor.
6. 1×C1815 Transistor.
7. 1×A1015 Transistor.
8. 2×1KΩ resistor 1/4W.
9. 2×15KΩ resistor 1/4W.
10. 2×220Ω resistor 1/4W.
11. 3×100Ω resistor 1/4W.
12. 1×56KΩ resistor 1/4W.
13. 1×20K-22KΩ resistor 1/4W.
14. 2×10Ω resistor 1/2W.
15. 2×100Ω resistor 1W.
16. 1×10Ω resistor 1W.
17. 1×10Ω resistor 2W.
18. 2×2.2kΩ resistor 1W.
19. 4×0.33Ω resistor 5W.
20. 1×5uH coil (1.2mm/ 18 gauge copper wire)
21. 1×10pF (10) capacitor 100V.
22. 2×220pF (221) capacitor 100V.
23. 2×0.0047uF (472) capacitor 100V.
24. 2×330pF (331) capacitor 100V.
25. 1×0.47uF (474) capacitor 100V.
26. 1×0.1uF (104) capacitor 250V.
27. 2×100uF capacitor 50/63V.
28. 1×220uF capacitor 25V.
29. 2×10000uF capacitor 63V.
30. 2×1N4007 diode.
31. 2×15V Zener diode.
32. 5×6.3 mm Vertical PCB terminal.
33. 1×2.54 mm socket.
34. 1×8 pin IC base.
35. 1×100k single turn potentiometer.
36. 1×GBJ2510 Bridge rectifier.

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.

Let's Make it

Hello Friends, In this post I make a 250 Watt mono amplifier using 2SC2922 and 2SA1216 transistor. In input stage of this amplifier I use UA741 IC. But in place of UA741 IC, you can also use TL081 or TL071 IC and in place of 2SC2922 and 2SA1216 transistor, you can use 2SC5200 and 2SA1943 transistor. But If 2SC5200 and 2SA1943 transistor, you will get only 200 watt.
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 Blue 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.

How To Check 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:- Biasing = 0.5-0.7V. 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:- For get best performance of this amplifier, you use 30-0-30V to 40-0-40V 5A-8A Transformer.

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