Crystal Radio Audio Amplifier Circuit

Crystal Radio Audio Amplifier Circuit

Here is a simple audio amplifier application a TL431 blow regulator. The amplifier will accommodate room-filling aggregate from an accustomed clear radio outfitted with a long-wire antenna and acceptable ground. The chip is agnate in complication to a simple one-transistor radio but the achievement is far superior.

The TL431 is accessible in a TO-92 amalgamation and it looks like an accustomed transistor so your hobbyist accompany will be afflicted by the aggregate you are accepting with alone one transistor! The amplifier may be acclimated for added projects, too. Higher impedance headphones and speakers may additionally be used. An earphone from an old blast will accord boisterous aggregate and abundant sensitivity! The 68 ohm resistor may be added to several hundred ohms back application aerial impedance earphones to save array power.

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Make 5 1 Channel Audio Amplifier

5.1 channel amplifier consists of 6 amplifiers 1 channel mono, which has certain specifications on each canals. Has 6 channel surround sound amplifier that consists of Front Left ,Center,Front Right ,Rear Left (Left Surround),Rear Right (Right Surround) , and LFE (Subwoofer).For clarity I give a simple illustration of the layout and the circuit for these speakers.

5.1 Speaker Setup

Accoustic Field Generator
Acoustic Field Generator is generating acoustic sound with surround effects are adjustable with a standard Dolby Surround, able to produce surround sound is good enough but not too much need of funds. Technological developments as if not only focused on one area alone but on all fronts. The development of technologies that exist today one of them is in the field of audio. With more advanced audio technology today not only as mere entertainment but has become a hobby, hobby is not cheap of course. Many audio enthusiasts trying to make music sound that sounded to be very hard to make music sound as live, the addition of the amplifier, woofer or special speakers that cost is not cheap.

The sound effects are living seems to now is something that most do not have to exist in every good audio devices. This effect is basically a surround effect that can lead to sound as though coming from different directions and his voice can still be heard clearly. Currently Compo-tape tape that has been a lot of these facilities surround sound but not good enough when heard from a considerable distance because of the effects surroundnya missing. This is because the distance is too far listener and speaker, speaker layout is not quite right, or the effect of unfavorable surround.


Surround effects are nice and can be heard with a good surround system is a system that is in movie theaters and to make it not a bit prangkat needed funds. However, if satisfaction remains the number one then the fund is not a major problem. To find a middle ground between price and quality surround effects it was attempted to make the Acoustic Field Generator that can produce surround sound is good enough but not too much need of funds. Acoustic Field Generator is capable of generating acoustic sound with surround effects are adjustable with a standard Dolby Surround.


Accoustic Field Generator Construction

Basically an Acoustic Field Generator built from op-amp circuit and filters. Op-amps are usually used as a voltage amplifier in the Acoustic Field Generator is more widely used as active filters. The filter in the tool is very instrumental in creating an acoustic sound that is really clear, but in practice, almost all the filters, do not miss the precision of the signal with a specific frequency. An op-amp is good for this application is the op-amp which has a wide bandwidth, rise time, slew rate and fast setting timenya. In addition to op-amp and active filter, theres more important parts of the power supply. This is the part that is instrumental in creating excellence acoustic sound because of the bad power supply which is the only producer of noise, which will enter into a voice signal path so that should clear acoustic sound into an acoustic sound with the addition of reverberation (noise). The power supply used is the twin power supply + / - 18 volts DC. Part Acoustic Field Generators



Before we start doing this project, it helps us know in advance about the function of each speaker.

Front Channel

Channel Front is a forward channel input signal LR. LR signal is passed to an amplifier with gain = 1 so that this signal is passed without change / to filter the input signal LR. Front Left and Front Right, is a public speaker that we encountered in stereo amplifier, consisting of a woofer and tweeter. Woofers generally produce low tone sound with a frequency range ranging from 80Hz - 250Hz, while the tweeter produces a high tone with a frequency range between 15kHz - 20kHz. For projects that we will create, its good we use a good quality woofer, with a size of 10 inches and a type piezoelectric tweeter for each speaker fronts.

Front Channel 5.1 Amplifier

Center Channel

Center, the fullrange speakers, which produce sound with a frequency range between 80Hz - 10Khz. Output from the center speaker is a summation of left and right signal (left + right = center). In a movie or song Dolby Surround format, commonly used center for dialogue / vocal or speech of the actor / artist of a film and to produce a sound that moves ahead of us.

Center Channel 5.1 Amplifier

Rear Channel with Surround System

In this section is the core of this hard perangakat. These sections produce surround effects. To produce the surround effect is required special IC MN3005 / 8 and MN3101. Both these ICs will delay the incoming signal in several phases, so that the signal output from this phase will be left with a signal phase of the signal lain.Pada this section L and R are deducted (LR) and then passed in the buffer, filter LPF, delay line, filter LPF (7KHz) and the last is a splitter between the signals R and L. Circuit which causes the surround effect is 75KHz LPF circuit that produces its output fed to the Right Rear 75KHz LPF amplifier input while it diparalel with the Left Rear amplifier input so as to produce two signals L and R which is basically a LR signal a phase lag with the original signal phase.

Rear Left and Rear Right, also known as surround speakers. This speaker is generally a semi-midrange speaker (usually used on television or Mini Compo), commonly called satellite speakers. In a movie surround speakers are used to generate the audible sound of distant voices or sounds that move from the back of our approach. In a music surround speakers produce sound backing vocals and generally sounds like guitars, violins and trumpets sounded clear here.

Rear Channel 5.1 Amplifier

Subwoofer Channel

Part of this subwoofer is the summation of inputs L and R inputs to a summing amplifier. The output of the summing amplifier is passed to a class 2A LPF which will only pass signals with frequency rendah.Subwoofer, sometimes referred to as LFE (Low Frequency Effect). For these speakers using a subwoofer speaker. Speaker woofer speaker subwoofer is designed specifically to be able to respond to sound with a very low frequency, ranging from 15Hz - 120Hz. For low tone effect can be produced by either (without any harmonic frequency), then the acoustic box / box speakers are also designed specifically with a variety of methods (there are no visible speaker / inside the box, there are that use insulation / labyrinth, etc. ), so that the speaker is capable of compressing the air effectively, so that will feel the effect.

Subwoofer Channel 5.1 Amplifier

Wiring Diagram Home Theater Amplifier / 5.1 Amplifier

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10 Watt Car Audio Amplifier

10 Watt Car Audio AmplifierTDA2003 is audio amplifier integrated circuit chip in 10 Watt class. All you need is just adding few passive components and your amplifier will be ready. You can even amplify ultrasonic range if you wish to abuse its usage, just to convince you that this chip is more than enough to handle any range of audio signal. Although many manufacturer produce this TDA2003 chip, in general, this various chip from various manufacturer normally comply with these following features: Short circuit protection between all pins, High current output ( up to 3 A), Built-in Over temperature protection, and Low harmonic and crossover distortion.

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High efficiency stereo Class D audio amplifier

The SSM2380 is a fully integrated, high efficiency, stereo Class-D audio amplifier designed for mobile phone applications , mp3 players and other audio applications that require low output power . This class D audio amplifier  circuit requires few external components and operates from a single 2.5 V to 5.5 V supply.

SSM2380 audio amplifier  circuit is capable of delivering 2 W of continuous output power with <1% THD + N driving a 4 ohms load from a 5.0 V supply, or 1.4 watts of continuous output power on a 8 ohms load  .

The SSM2380 features a highly flexible I2C interface with many useful settings. Using the I2C control interface, the gain of SSM2380 can be selected from 1dB to 24 dB + Mute in 47 steps with no external components Other features accessed from the I2C interface are: independent L/R channel shutdown, variable ultra-low EMI emission control mode, Automatic Level Control (ALC) for high quality speaker protection, and Stereo-to-Mono mixing operation.

The SSM2380 features a high efficiency, low noise modulation scheme that requires no external LC output filters.

It operates with 93% efficiency at 1.4 W into 8 ohms or 85% efficiency at 2W into 4 ohms from a 5.0 V supply and has an SNR of >100 dB.

Main features of the SSM2380 audio amplifier are : highly configurable I2C interface , stereo amplifier configuration , stereo-to-mono mixer option via I2C control , 93% efficiency at 5.0 V, 1.4 W into 8 ohms speaker , >100 dB signal-to-noise ratio (SNR) , single-supply operation from 2.5 V to 5.5 V , 20 nA ultralow shutdown current , short-circuit and thermal protection , pop-and-click suppression.

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9 Volt Audio Power Amplifier

This is an audio amplifier to facilitate can be there used with a miniature 9 volt Battery Operated,Current draw on since insufficiently as 5 milliamps.And amplification up to 500 mW. Which is sufficient to spread out the sound from a sound almost or else the recording stroll guy vetoed to the minor speakers evidently.

9 Volt Audio Power Amplifier

Once entering the power supply 9-volt circuit IC1 total LM386 amplifier IC size is 300-800 mW, Depending on the power supply circuit with,This is from 4-15 volts. once upon a time entered into the input pin 3,The non inverting pin to amplifier non-return time.C1 resolve occur served remove out the clatter input to ground.And C2 increases the rate of amplifier,C2 is to add supplementary help.But if the C2 Too much distortion (the C2 must not exceed 100uF).The output of IC1 is out cold of the pin 5 through C4 coupling audio signals to better and DC blockade and not voted for to the spokesperson.on behalf of the audio portion bidding besides befall fed back through R2 and C3 to the above what is usual frequency response better.

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4 Channels Home Audio Power Amplifier

This is a minimal circuit. right management a single IC, but the amplifier has 4 channels, 11 channels apiece watt, which is Philips IC TDA1554 run to apposite in support of listening by the side of land of your birth otherwise dressed in one vehicle. Just since the power supply 12-15 volt otherwise yearn for transpire used to open out any home acting sound organization. The at the outset 2-channel amplifier front speakers. And 2 to widen the back surround sound speakers additionally.

4 Channels Home Audio Power Amplifier

This circuit power supply 12 volts to 18 volts Power consumption next to 5A. The input 4 input pins 1, 2, 17 and 18 is not speaking into a horizontal input inverter Ting 2 channels (Pin 1, 17). inverse classic and input object 2 channels (pins 2, 6). with the purpose of we can function that. To output point to phase or else did not return. The output self-control be there the fourth slot on the crutch 6, 8, 12, 10, with a C7-C10 serves to boost the low frequency stability better in the past you die to the loudspeaker. The switch S1 acts on mute by urgent S1 will be stopped sound procedure circuit here Mute, and if unfasten circuit S1 supply on the point of to masterpiece. The C5 and C6 bidding filter light to smooth absent and eliminate interference.

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Hi Fi Audio Amplifier using TDA1514

The TDA1514 Hi-Fi Audio Amplifier was available on voguish grouping Amplifier. Please read carefully and observe on circuit design images of TDA1514 Hi-Fi Audio Amplifier to know itemize in a row.

Hi-Fi Audio Amplifier using TDA1514

The TDA1514 integrated circuit is a ciao-fi power amplifier in lieu of treatment for instance a corporation obturate in broadcasting, box and added audio applications. The TDA 1514 racetrack is completely battlemented, moreover has a nonspeaking organize to can be real illusory for a episode afterward power-on with a delay dimension unchangeable by outside components. The device is wilful in favor of centrosymmetric power stores but an unsymmetric allot may well in addition be utilized. For photo amplifier assemblage use two go well together circuits.

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25W Class A Power Audio Amplifier Wiring diagram Schematic

This is the 25W Class-A power audio amplifier schema. The output devices are MJL4281A (NPN) and MJL4302A (PNP), and have high bandwidth, fantastic SOA (safe operating area), high linearity and high gain. Driver transistors are MJE15034 (NPN) and MJE15035 (PNP). All devices are rated at 350V, using the power transistors having a 230W dissipation and the drivers are 50W.

25W Class-A Power Audio Amplifier Circuit Diagram

•  The supply voltage must be a maximum of ±25V. This supply is simply obtained from a 20-0-20V transformer, recommended current is 1A.
•  All resistors ought to be 1/4W or 1/2W 1% metal film for lowest noise, with the exception of R9, R10 and R15 which ought to be 1/2W varieties, and R13, R14 have to be 5W wirewound.
•  Using the suggested and advised 25V supplies, Q4 will typically not need a heatsink. The output drivers (Q5 and Q6) recommended to use a heatsink, even though it doesn’t have to be big.

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TDA2040 20W HI FI Audio Amplifier

Here the hi-fi power amplifier schema which will deliver 20W power output. This amplifier schema use single power IC TDA2040 and a few external components.

Detailed explanation about this 20W Power Amplifier

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20W Bridge Audio Amplifier Wiring diagram Schematic

Specifications:

• 20W Bridge Audio Amplifier kit, based on the TDA2005 IC, a class B dual audio amplifier, specifically designed for car radio applications etc.
• Power supply - 18 VDC
• Output power - 20 W, 4 Ω
• IC built in Thermal Shut-down, Load dump voltage surge protected
• Terminal pins for connecting left and right audio signal inputs
• Relimate Connector for connecting Potentiometer (POT) for volume adjustment
• Power Battery Terminal (PBT) for easy power supply and speaker connection
• Power-On LED indicator
• Heatsink for IC
• Four mounting holes of 3.2 mm each with nut and stud
• PCB dimensions 63 mm x 65 mm

20W Bridge Audio Amplifier Circuit Diagram

Pcb

Parts List

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12 Watt Audio Amplifier

This low cost amplifier is simple and give you good result. Here the op-amp used is uA 741 which produces the required gain.The four transistors are wired as complementary Darlington’s which produces the drive for the speaker.

The voltage drop across the resistors R2 and R3, are used as the input of the Darlington pairs . As the input current to the op-amp depends on the level of the signal op amp is amplifying the voltage drop across the resistors R2 and R3 will be proportional to the input signal. These voltage drops are given to the base of Darlington pairs. The amplification is stabilized as a result of the negative feedback from the junction of collectors of Q2 and Q4. The theory may seem little awkward for you. But its working good.cSuch a simple but stable schema as this can produce a reasonable output of 12W on a 4 Ohm speaker.

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10 to 14W Class A Audio Amplifier Wiring diagram Schematic

I have built this amplifier and it does sound good. It requires a preamp as it hasnt got much gain. It requires big heat sinks and a large transformer and a great power supply and careful wiring, but in the end it is xtremely simple and it sounds very good. The zener diode rejects any ripple coming from the power supply, But you still only want a ripple of 10mV max. The ripple reaching the input is amplified, so the zener diode gets rid of that, but whatever ripple there is will still reach the power stage.

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TDA7594 Audio Amplifier 50W

TDA7594 general description:

    The Type IC TDA7294 from SGS-Thomson is an integrated a.f. amplifier intended for use in all sorts of hi-f application. According to the manufacturers data sheets, chip can deliver outputs of up to 100 watt. Considering other properties, such as low noise, low distortion and reliable short-circuit and thermal protection circuits as well, the chip is indeed an interesting one. Moreover, with peak supply voltages of ±40 V and a load impedance of 4 ohm, the maximum dissipation of the IC TDA7294 will easily be exceeded. For these reasons, the supply in the present amplifier has been kept down to a safe ±30 V. At these voltages, the chip delivers, without any difficulty, 50 W into an 8 ohm load and 80 W into a 4 ohm load. These are still very respectable figures, particularly in view of the reasonable IC price. The circuit diagram of the amplifier in shows that the IC TDA7294 needs only a small number of external components. The input signal is applied to pin 3 via capacitor C1 and low-pass filter R6-C10. The filter improves the pulse response and flattens the frequency response. For maximum output offset, the values of R1 and R3 should be equal, so that the input impedance is 10k. The roll-off frequencies of R1-C1 and R2-C2 determine the lower bandwidth limit of the amplifier: with values a specified, this is about 16 Hz. The upper -3 dB point is at about 100 kHz.The amplifier is muted by a relevant input to pin 10 and placed in the stand-by mode by a relevant signal at pin 9. Muting should always take place before the stand-by mode is selected. Connecting the mute and standby pins permanently to the supply line ensures that the amplifier comes on immediately the power is switched on. Any switch-on clicks may be eliminated by increasing time constants R3-C4 and R5-C5. If large-value electrolyte capacitors are used in the power supply, switching off will be rather slow. It is best to build the amplifier on the printed-circuit board shown below. Insulating material between the heat sink and the IS is. The amplifier will have good performance with toroidal mains transformer, a 25A bridge rectifier and two 10.000uf,50 V electrolytic capacitors.

TDA7594 Circuit diagram:

 

MUTE and ST-BY utilization:

TDA7594 pcb layout:

Datasheet for TDA7594: Download - No

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Part 2 Contact info and web adresses of integrated circuits power audio amplifiers manufacturers

Crl- Cirrus Logic, Inc.
 P.O. Box 17847, Austin, Texas 78760, USA. Phone: (512) 445 7222
http://www.cirrus.com

Csm- Chengdu Sino Microelectronics System Co., Ltd.
2nd floor, Building D, Science & Technology Industrial Park, 11 Gaopeng Avenue, Chengdu
High-Tech Zone, Chengdu City, Sichuan Province, P.R.China. Phone: +86-28-8517-7737
http://www.csmsc.com451

Dae- Deawoo Semiconductor
60-8 Kasan-Dong, Kumchun-Gu, Seoul Korea. Phone: +02-818-9652
http://www.daewoo.co.kr

Ecg- ECG (Is not a current ICs manufacturer)
A Philips (USA) subdivision.
1025 Westminster Drive, Williamsport, PA 17701 USA
http://www.ecgproducts.com

Eut- Eutech Microelectronics
4F, 38-1, Ming Shen N. Rd. Sec. 1, Kuei-Shan, Taoyuan 333, Taiwan, R.O.C.
Phone: 886-3-3164556
http://www.eutechmicro.com

Exr- Exar Corporation
48720 Kato Road Freemont, CA 94538, USA. Phone: +1-510-668-7000
http://www.exar.com

Fch- Fairchild Semiconductor Corp.
333 Western Avenue, South Portland ME 04106, USA. Phone: 207/775-8100
http://www.fairchildsemi.com

Fuj- Fujitsu Microelectronics, Inc.
3545 North First Street, San Jose, CA 95134, USA. Phone: 408/922-9000
http://www.fujitsumicro.com

GE- General Electric Semiconductor
Electronics Park Bldg. 7 Syracuse, NY 13221, USA. Phone: 315/456-3606
http://www.ge.com

Gen- Gennum Corp.
Box 489, Station A, 970 Fraser Drive, Burlington, Ontario, Canada, L7R 3Y3
Phone:+1-905-632-2996
http://www.gennum.com

Har- Harris Corporation (Is not a current ICs manufacturer)
1025 West NASA Boulevard, Melbourne, Florida 32919-0001, USA
Phone: 1-321-727-9207
http://www.harris.com

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70 Watt MOSFET Audio Amplifier

This amplifierschema will give you about 70W output power at 60v supply.
Please visit this page for detail information and characterization

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LM3900 Multi channel Audio Mixer

A simple multi-channel audio mixer circuit using LM3900 quad amplifier is given below. The circuit consists of 4 channel quad amplifier (LM3900). two mic audio inputs and two direct line inputs are offered in this circuit. By adding constant circuit parallel with this, youll be able to increase the quantity of inputs according to the applications.

Each input is connected to the inverting terminal of LM3900. The built in amplifier of each section amplifies every audio input separately and is fed to the output terminals. The output terminal from every channel is connected to one output line with a resistance not greater than 680K and produces a mixed audio at the output with terribly low noise. This audio mixer circuit doesn’t use a low impedance input to combine ideal sources. Capacitors C1 to C4 are the decoupling capacitors for the corresponding channels. C5 is the output decoupling capacitor.

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LM3886 High Performance Audio Power Amplifier

Audio Power Amplifier is an important part in sound reproduction ina sound system. Audio Power Amplifier with this power IC LM 3886Audio Power Amplifier is a highly capable and able to produce68 Watt power avg. 4Ohm load and capable of producing power 38 Watt8Ohm load.

With good sound reproduction capabilities of 20Hz-20kHz also possessed this LM3886 Audio Power Amplifier. Audio Power Amplifier LM3886 Speaker is equipped with protection that will protect the circuit output from over-voltage, under-voltage, over-loads, a short circuit power supply, thermal run-away and the temperature peak. Audio Power Amplifier LM3886 also equipped with noise reduction that can keep the audio system from noise well.

Schematic power amplifier with LM3886

Feature owned LM3886 Audio Power Amplifier

• 68W cont. avg. output power into 4Ω at VCC = ± 28V
• 38W cont. avg. output power into 8Ω at VCC = ± 28V
• 50W cont. avg. output power into 8Ω at VCC = ± 35V
• 135W instantaneous peak output power capability
• Signal-to-Noise Ratio ≥ 92dB
• An input mute function
• Output protection from a short to ground or to the supplies via internal current limiting circuitry
• Output over-voltage protection against transients from inductive loads
• Supply under-voltage protection, not allowing internal biasing to occur Pls | VEE | + | VCC | ≤ 12V, Thus eliminating turn-on and turn-off transients
• 11-lead TO-220 package
• Wide supply range 20V - 94V

Application of Audio Power Amplifier LM3886

• Stereo audio system
• Active Speaker
• High End Audio Power TV
• Suround Power Amplifier

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Quality Stereo Wireless Microphone or Audio Link

Quality Stereo Wireless Microphone or Audio Link. This stereo FM wireless microphone also makes a great quality audio link. We tested it to beyond 50 meters and it was rock solid. It’s certainly not the first wireless microphone we’ve ever published but this one is a little different. It’s stereo, providing surprisingly good quality sound. Second, it has a really good range. We tested it at well over 50m and it was still performing very well – noise-free, in fact – but at the time we couldn’t get our receiver any further away. So it’s likely to have even better range than that.

Complete Project:

Its easy to build, requires very little setup... and its cheap! In fact, the low price might turn some people off, thinking its low quality. Try it - and be pleasantly surprised!

Third, it really is simple to build – the hard work (the transmitter module) is already done for you. It’s just a matter of assembling the microphone module, which contains the electret mics themselves, preamp and level controls, and soldering the transmitter module onto it, "piggy back" style.

FM Transmitter:

Finally, the transmitter module is crystal-locked, so you won’t have the drift probles of some earlier wireless microphones. And just in case you were wondering, that doesn’t mean the output is locked to one particular frequency – it has a nifty synthesis schema built in to give you the choice of seven different frequencies between 106.7MHz and 107.7MHz.

On-board preset pots adjust the sensitivity of each channel to take into account mic differences or if you require different levels in each channel.

By the way, the transmitter module is quite capable of operating at line level if you want just a line level transmitter (eg, to feed an audio program around your home). Sensitivity is about 100mV. Oatley Electronics, who designed the kit, have the transmitter module available by itself if that’s what you’re after. But more on that anon.

Parts Layout:

You also have the choice of two power supply levels – 3-6V or 7-15V DC. The latter results in a lower current drain. The transmitter module also has a "5V out" rail to supply power to the preamp module.

Quality Stereo Wireless Microphone Circuit Diagram:

Two electret microphone inserts are supplied in the kit. These can be soldered direct to the PC board to make it a fully self-contained project or they can be attached to the board via suitable lengths of mini shielded coax cable. A third option is to use "proper" microphones – they can be electret or dynamic types – but no provision has been made for plugging these in.

Typical Specifications:
Audio response:.....................20Hz-15kHz.
Channel separation: ........................40dB
Total Harmonic Distortion: ...............0.1%
Output Frequency:...........106.7-107.2MHz
Pre Emphasis: ..................................50μS
DC supply voltage range: ................3-15V
Supply Current: .......................30mA @ 9V

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TL071 MOSFET Audio Amplifier 1 x 70w

TL071 MOSFET Audio Amplifier general description: 

   This simple mosfet power audio amplifier circuit, with TL071 and 2 mosfets (IRF9530, IRF530) power amplifiers can deliver up to 45W on 8 ohm. This schematic is based on Siliconix application and is based on variations of voltage on the 2 resistors serial inserted on the voltage supplier of the operational amplifier driver. The mosfet transistors must be mounted on a heatsink at least 1K/W.  Amplifier efficiency is 70%, distortions at cut frequency were at most 0.2% at 20Hz on 8 ohm and 10W. With a power supply of +/- 30V the mosfet audio amplifier can deliver 45W on 8 ohm and 70w on 4 ohm. Remember that this audio amplifier is not protected on short circuits so every time you switch on check to see if the speaker is connected.

MOSFET Audio Amplifier Circuit diagram:

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TBA820 low power audio amplifier

At this time amplifier circuit based on IC KA2201, TBA820M, LM820M, and U820. You can use all ic is the series under the scheme. This amplifier circuit has a very small output power or low at 2W. Required supply voltage from 3 volts to a maximum of 16 volts.

Below is a scheme of this power amplifier

Part List

R1 = 100K

R2 = 120R

R3 = 100R

C1 = 100nF

C2 = 100uF
C3 = 470uF
C4 = 220pF

C5 = 47uF

C6 = 100uF

IC = KA2201 , LM820M , TBA820M , U820M

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