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Led Transfo Transfo rmer 5years Warranty,welcome to order Eff 92%.Used 92%.Used in 10-300W 10-300W Led Light s www.wntpower.com
This main main amplifier 50 watt OCL circuit has high quality and economical. Because it i s designed simple, simple, It can be easily c reated in your friends, An electronics rookie. And cheap when compared to other speakers, the as same volume level. The main power amp. This circuit is designed in such a way “Direct Coupling All Complementary IC Drive” will be seen that, the heart of the circuit is IC1(LF351), are the differential amplifier amplifier and pre driver circuit. Note: I chose LF351, because the noise reduction circuit. And high frequency response than IC741, or you may use a number TL071 or NE5534N is good quality as well. The output signal of IC1 pass through two diodes D1,D2(both is 1N4148) to the transistor drivers Q1( BD139 ),Q2(BD140). Then, their current is ent ered to two main transistor output Q3(MJ2955),Q4(2N3055). Q3(MJ2955),Q4(2N3055). The small small Potentiometer VR2-1K is fined fined the idle current of this amplifier amplifier circuit that easy to fine who not has an amp meter to do not need measure the IDLE current, you just fine the VR2 at middle middle only (very simple!) simple!)
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The dc dual power supply +35V GND -35V, 3A for Mono and 5A for stereo system. Instructions on how to create. 1. Check the completed of PCB that defective, short circuit or not. 2. First, do not connect to the output transistors(MJ2955,2N3055). 3. Use a voltmeter measure voltage at output speaker and ground point. 4. Supply to this circuit And must meter reading is zero volts. Or error must not exceed 0.5V. 5. put the output transistor into this circuit. 6. The voltage must be OV the same, If non-zero, indicating that the bad output transistors. 7. Connect speakers and input signal to this amplifier circuit. Let’s to listen the melodic music.
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The Electronic parts. IC1______LF351,TL071,LM741 Q1_______BD139 Q2_______BD140 Q3_______2N3055 Q4_______MJ2955 ZD1,ZD2___15V 0.5W Zener diode VR1______50K Potentiometer VR2______1K pot C1,C9____10uF 16V Electrolytic capacitors C3,C4___47uF 25V Electrolytic capacitors C2______100uF 16V Electrolytic capacitors D1,D2____1N4148 Diode The caution. Holding the output transistors onto the heat sink you must sure that: 1. The screws tight, not fell, the loose easily. 2. Do not the short circuit between the collector Pin(transistor body) and heat sink, Due to the installation of mica insulation is not well. And….. This circuit may be good for you!
65W Amplifier Class AB by LF351 ,TIP3055 and TIP2955 I like mini power amplifier less 100W because it is low cost nad easy to make project. The 65W Amplifier Class AB,I use main part electronics are IC LF351 and thansisror two part TIP3055 and TIP2955. The LF351 is a low cost high speed JFET input operational amplifier. The TIP3055 and TIP2955 are small size but have high power. This is circuit want Voltage supply +38V and -38V at current 3A min. Have output power 65W to 75W at 8ohm speakers.
50W Amplifier OCL with TIP33,TIP34 9/29/2012 3 02 AM
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This is the power amplifier hifi ocl 50 watt, that I made with an all transistors. Because can reduce a noise signal very good, Natures sounds was helps to relax when listens for a long time and economical. Because the number of transistors old, inexpensive and easy to buy. However, it also has some disadvantages that make it difficult when compared to the use of IC products. From the circuit below. When we use a power supply +40 V and-40V will be about 50 watts RMS into 8-ohm speaker loads. You can use the number of transistors used as BD249C, TIP33C, MJE3055, 2N3055 and BD250C, TIP34C, MJE2955, MJ2955 or a or Equivalent number.
This simple audio power amplifier was originally designed for a circuit board workshop, conducted by the OSU IEEE Student Group. At the workshop, 20 participants each constructed this amplifier, by etching and drilling the single sided circuit board, soldering all components, and attaching a pre-built heatsink assembly with the output transistors. Three workshops were held between 1995 to 1996. Though the design is simple, these amplifiers have impressive performance, with a frequency response to approx 40 kHz, very low noise, reasonably fast slew rate, and approx 50 watt s (true RMS power) with the proper +/ - 40 volt unregulated power supply.
Power Amp OCL 70w With IC 741, 2N3055 Younger brothers and sisters a student takes an interest t o build electronics project sends a teacher. I then choose this circuit , because build easy be valuable certainly. It is Main Power Amplifier Circuit 70Watt RMS sizes are model OCL Class AB. Use pillar equipment be IC 741 and Transistor 2N3055,MJ2955 a little this equipment circuit. If friends want get electric tall power about 70Watt should use Voltage Supply +38V , and -38V. The usability should fine VR1 be appropriate. Request a friend has fun to listen the music from Amp Circuit , please sir.
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Be the first to comment - What do you think? Posted by admin - September 11, 2012 at 12:48 am Categories: Power Amplifier Tags: 50 watt amplifier , BD140, Cheap power amplifier , Home power amplifier , MJ2955, OCL power amplifier
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