Rangkaian 1,5V Earphones Audio Amplifier

This audio amplifier circuit, connected to 32 Ohm impedance mini-earphones, can detect very remote sounds. Useful for theatre, cinema and lecture goers: every word will be clearly heard. You can also listen to your television set at a very low volume, avoiding to bother relatives and neighbors. Even if you have a faultless hearing, you may discover unexpected sounds using this device: a remote bird twittering will seem very close to you.

Skema Rangkaian 1,5V Earphones Audio Amplifier

The heart of the circuit is a constant-volume control amplifier. All the signals picked-up by the microphone are amplified at a constant level of about 1 Volt peak to peak. In this manner very low amplitude audio signals are highly amplified and high amplitude ones are limited. This operation is accomplished by Q3, modifying the bias of Q1 (hence its AC gain) by means of R2.

A noteworthy feature of this circuit is 1,5V battery operation.
Typical current drawing: 7,5mA.

List Component

• P1: 22K Log. Potentiometer
• R1,R9: 10K 1/4W Resistors
• R2: 1M 1/4W Resistor
• R3: 4K7 1/4W Resistor
• R4,R7: 100K 1/4W Resistor
• R5: 3K9 1/4W Resistor
• R6: 1K5 1/4W Resistor
• R8: 100R 1/4W Resistor
• C1,C2: 100nF 63V Polyester or Ceramic Capacitors
• C3,C6: 1µF 63V Polyester or Ceramic Capacitors
• C4: 10µF 25V Electrolytic Capacitor
• C5: 470µF 25V Electrolytic Capacitor
• D1: 1N4148 75V 150mA Diode
• Q1,Q2,Q3: BC547 45V 100mA NPN Transistors
• Q4: BC337 45V 800mA NPN Transistor
• MIC1: Miniature electret microphone
• SW1: SPST Switch
• J1: Stereo 3mm. Jack socket
• B1: 1.5V Battery

Source

45 watt Amplifier kelas B

45 Watt Class B amplifier Circuit of this very simple , straightforward but Rugged circuit, though intended for any high quality audio applications and, above all, to complete the series of articles recently started forming the Modular Preamplifier Control Center, is well suited Also to make a very Good Guitar or Bass amplifier

Skema rangkaian 45 watt amplifier kelas B

Note

• Power transistors Q8 and Q9 Can be Used satisfactorily: 2N3055/MJ2955, TIP3055/TIP2955, TIP35/TIP36, MJ802/MJ4502 amongst others.
• Power transistors Q8 and Q9 Should be mounted on a black, finned heatsinks as usual.

Technical data:

• Output power (1KHz sinewave): 45 Watt RMS into 8 Ohms - 69W RMS into 4 Ohms
• Sensitivity: 0.81V RMS input for 45W output
• Frequency response @ 1W RMS: 15Hz to 23KHz -0.2dB
• Total harmonic distortion @ 1KHz: 1W 0.008% 20W 0.008% 45W 0.016%
• Total harmonic distortion @10KHz: 1W 0.01% 20W 0.015% 45W 0.025%
• Unconditionally stable on capacitive loads

List Component

• R1: 18K
• R2: 3K9
• R3,R6: 1K
• R4: 2K2
• R5: 15K
• R7: 22K
• R8: 330R
• R9,R10: 10R
• R11,R12: 47R
• R13: 10R/1 Watt
• C1: 1µF/63V
• C2: 470pF/63V
• C3: 47µF/25V
• C4: 15pF/63V
• C6: 220nF/100V
• C6: 100nF/63V
• D1,D2,D3,D4: 1N4148
• Q1,Q2: BC560C
• Q3,Q4: BC556
• Q5: BC546
• Q6: BD139
• Q7: BD140
• Q8: 2N3055
• Q9: MJ2955

source

Rangkaian 2 watt Amplifier BD139/140

This amplifier operates in Class AB mode with up to 2 watts of output power, the single 470R preset resistor controls the quiescent current PR1 flowing through the BD139/140 complimentary output transistors. Adjustment here, is a trade-off Between low distortion and low quiescent current. Typically, under quiescent conditions, current is about 15 mA, rising to 150 mA with a 50 mV input signal. The frequency response is shown below and is flat from 20Hz to 100kHz

Skema rangkaian 2 watt amplifier

PR1 470R controls the quiescent current flowing through the BD139/140 complimentary output transistors. Adjustment here, is a trade-off between low distortion and low quiescent current. Typically, under quiescent conditions, current is about 15 mA rising to 150 mA with a 50 mV input signal. The frequency response is shown below and is flat from 20Hz to 100kHz

This amplifier circuit is DC biased so that the emitters of the BD139 and BD140 are at approximately half supply voltage, to allow for a maximum output voltage swing. R9 and R10 provide a degree of temperature stabilization which works as follows. If the output transistors are warm, the emitter currents will increase. This causes a greater voltage drop across R9 and R10 reducing the available bias current. All four transistors are direct coupled which ensures:

• A good low frequency response
• Temperature and bias change stability.

Mini Amplifier IC LM380

Based amplifier IC's offer many advantages including high efficiency, high gain, low standby current, low component count, small size and, of course, low cost. It is little wonder that audio amp IC's have replaced most discrete transistors in consumer electronic devices. While many experimenters have stayed away from these little black Mysteries, I am going to uncover some of their secrets and demonstrate how easy they are to use

Rangkaian Amplifier IC LM380

Amplifier IC LM380 comes in two flavors; LM380 and LM380-8 with output powers of 700 milli-watts and 2 watts respectively. A schematic drawing below depicts the 8th and LM380-LM380.

Skema Rangkaian Amplifier IC LM380-8

Skema Rangkaian Amplifier IC LM380

The LM380-8 comes in an 8-pin package and its basic circuit is virtually identical to the LM380 except for the different pin out. The LM380 comes in a 14-pin package and pins 3,4,5,10,11 and 13 are connected to ground to act as a heat sink. Experience has shown the LM380 should be soldered directly to the circuit board (no IC socket) if it is going to be operated at its full rated output of 2 watts. This IC can become quite warm and it's important to get rid of excess heat through the pins. The primary advantages of the LM380 series IC's are higher output power, very low distortion and low external parts count.

Audio Amplifier 4 Transistor

Audio Amplifier 4 Transistor

The circuit a 4-transistor amplifier suitable for a variety of projects including receivers, intercoms, microphones, telephone pick-up coils, and general audio monitoring. The amplifier has a power isolation circuit and bandwidth limiting to reduce oscillations and “motorboating”. The values are not particularly critical and modest deviations from the indicated values will not significantly degrade the performance.

Skema Rangkain Audio Amplifier 4 Transistor

Three cell battery packs giving about 4.5 volts are recommended for most transformerless audio amplifiers driving small 8 ohm speakers. The battery life will be considerably longer than a 9 volt rectangular battery and the cell resistance will remain lower over the life of the battery resulting in less distortion and stability problems.

The amplifier may be modified to work with a 9 volt battery if desired by moving the output transistors’ bias point. Lowering the 33k resistor connected from the second transistor’s base to ground to about 10k will move the voltage on the output electrolytic capacitor to about 1/2 the supply voltage. This bias change gives more signal swing before clipping occurs and this change is not necessary if the volume is adequate.

Mini Amplifier Stereo 4.5 Volt - 5.5 Volt

Mini Amplifier Stereo 4.5 Volt - 5.5 Volt

This circuit is ideal for small power audio applications such as portable CD players or radio sets.The circuit has been designed strictly toward the ingredients and found to be working well.

MAX9710 Stereo Audio Power Amplifier IC capable of producing 3Watts and out, of which 4 Ohm loads. MAX9710 uses a single 4.5V to 5.5V Power Thurs It is ideal for the provision of the manual is also applications.The IC Thermal overload protection.

Skema Rangkaian Mini Amplfier Stereo

Use a 5 V DC power supply for powering the circuit. f you want to use a battery ,then use a 6V battery with a IN 4007 diode series to the positive terminal of it.The diode will drop 0.7 V and the IC will get the rated ~5V.This is just a saftey recommendation


Features IC MAX9710

* 3W into 3Ω (1% THD+N)
* 4W into 3Ω (10% THD+N)
* Industry-Leading, Ultra-High 100dB PSRR
* PC99/01 Compliant
* Patented Click-and-Pop Suppression
* Low 0.005% THD+N
* Low Quiescent Current: 7mA
* Low-Power Shutdown Mode: 0.5µA
* MUTE Function
* Tiny 20-Pin Thin QFN (5mm x 5mm x 0.8mm)

3 Volt - 6 Volt Mini Audio Amplifier

3 Volt - 6 Volt Mini Audio Amplifier

Here is a mini 2W audio amplifier is suitable for small handheld radios and other portable audio gadgets. The amplifier circuit can be run from 3Volt. This Mercury is ideal for battery operated module.

Skema Rangkain 3 Volt - 6 Volt Mini Audio Amplifier

The potentiometer circuit can be used to control volume. Capacitor C1 and C2 are designed to filter supplyvoltage If the battery separator is used as operations offer source.For using batteries C1 and C2 are not required.

IC TDA7052 is a mono output amplifier in 8-comng Head DI package (DIP). The device is designed primarily for battery-operated portable audio circuits. Features include TDA 7052, no external components needed, no switch-on or switch-off button sounds great overall stability and very low power consumption (quiescent current of 4 mA), low THD, it is not necessary any cooler and short-circuit proof.

Profit TDA 7052 is set internally at 40 dB. . Compensate for the reduction of output power due to low voltage TDA7052 uses Bridge-Tied-Load principle
(BTL), which can provide power about 1 to 2 W RMS (THD = 10%), 8 ohm load to the power supply 6 V.

Amplifier MOSFET Sederhana

This circuit is an audio amplifier capable of delivering a decent output power with a minimum no: of parts , with considerable sound quality. The amplifier employs only one transistor and two MOSFETs and few resistors and capacitors in a shunt feedback scheme.This tiny circuit can can deliver a whopping 18Watts into 8 Ohm speaker or 30W into a 4 Ohm speaker.

Skema Rangkaian Amplifier MOSFET

To get such a good performance and stability out of few components, a high quality well regulated DC power supply is necessary. This is very essential for reducing noise and getting a constant output power on varying loads. A good DC voltage regulator able of providing more than 2 Amps @ 40V can be used.You can expect such a power supply design very soon here in the power supply section.

Components.
R1………………2K2 1/4W Resistance
R2………………27K 1/4W Resistance
R3R4………….2K2 1/2W Trimmers
R5………………100R 1/4W Resistance
R6………………1K 1/4W Resistance
R7,R8……….. .330R 1/4W Resistance

C1 ………………22µF 25V Electrolytic Capacitance
C2 ………………47pF 63V Polyester or Ceramic Capacitance
C3,C4 …………100µF 50V Electrolytic Capacitance
C5 ………………2200µF 50V Electrolytic Capacitance

Q1 ………………BC550C
Q2 ………………IRF530 or MTP12N10
Q3……………… IRF9530 or MTP12P10
.

10Watt Audio Amplifier Dengan Bass-boost

Audio Amplifier with Bass-boost

As the amplifier circuit is also used to move a number of frequency loudspeaker, the volume of the bass frequencies will be reduced. Therefore it is necessary to set the bass-boost controls on fedback loop amplifier, this is done to address the decline in quality. Graph bass can reach a maximum of +16.4 dB @ 50Hz.

10Watt Audio Amplifier Dengan Bass-boost

Note:
This circuit can be connected directly to a CD player, tuner, and tape recorders.
Transistor Q3 and Q4 must be in pairs with the heatsink.

Adjust the volume control on the minimum and R3 position with a minimum value of resistance as well. try to switch the circuit set in R3 to read the flow of about 20 to 25mA. Wait for 15 minutes, connect the ground of A1, P1, C2, C3dan C4. Connect the output also C9 ground

List Component

P1 : 22K Log Potemsiometer (Dual gang for stereo)
C3, 4 : 470uF/25V
P2 : 100K Log Potemsiometer (Dual gang for stereo)
C6 : 47pF 63V ceramic ar polyester capasitor
R2, 4, 8 : 820R 1/4W
C7 : 10nF 63V polyester capasitor
R1 : 4K7 1/4W
C9 : 100nF 63V polyester capasitor
R3 : 500R 1/2W
D1 : 1N4148 75V 150mA Diode
R5 : 82K 1/4W
IC 1 : NE5532 Low noise Dual Op-amp
R6, 7 : 47K 1/4W
Q1 : BC547B 45V 100mA NPN Transitor
R9 : 10R 1/2W
Q2 : BC557B 45V 100mA PNP Transitor
R10 : 0,22 4W(wirewound)
Q3 : TIP42A 60V 6A PNP Transistor
C1, 8 : 470nF 63V polyester capasitor
Q4 : TIP41A 60V 6A NPN Transistor
C2, 5 : 100uF/25V J1 : RCA audio input socket
.

6 Volt Headphone Amplifier

Some lovers of High Fidelity headphone listening prefer the use of battery powered headphone amplifiers, not only for portable units but also for home "table" applications. This design is intended to fulfil their needs and its topology is derived from the Portable Headphone Amplifier featuring an NPN/PNP compound pair emitter follower output stage. An improved output driving capability is gained by making this a push-pull Class-B arrangement. Output power can reach 100mW RMS into a 16 Ohm load at 6V supply with low standing and mean current consumption, allowing long battery duration.

The single voltage gain stage allows the easy implementation of a shunt-feedback circuitry giving excellent frequency stability.

Skema Rangkaian 6 Volt Headphone Amplifier

List Component of Headphone Amplifier:

P1_____________22K  Dual gang Log Potentiometer (ready for Stereo)

R1_____________15K  1/4W Resistor
R2____________100K  1/4W Resistor
R3____________100K  1/2W Trimmer Cermet
R4_____________47K  1/4W Resistor
R5____________470R  1/4W Resistor
R6____________500R  1/2W Trimmer Cermet
R7______________1K  1/4W Resistor
R8,R9__________18K  1/4W Resistors
R10,R11_________2R2 1/4W Resistors
R12____________33R  1/4W Resistor
R13_____________4K7 1/4W Resistor

C1,C2__________10µF  25V Electrolytic Capacitors
C3,C5_________100nF  63V Polyester Capacitors
C4,C6_________220µF  25V Electrolytic Capacitors

Q1,Q2,Q5______BC560C  45V 100mA Low noise High gain PNP Transistors
Q3,Q4_________BC550C  45V 100mA Low noise High gain NPN Transistor
Q6____________BC327   45V 800mA PNP Transistor
Q7____________BC337   45V 800mA NPN Transistor

J1_____________RCA audio input socket
J2_____________6mm. or 3mm. Stereo Jack socket
B1_____________6V Battery 

Notes:

• Before setting quiescent current rotate the volume control P1 to the minimum, Trimmer R6 to maximum resistance and Trimmer R3 to about the middle of its travel.
• Connect a suitable headphone set or, better, a 33 Ohm 1/2W resistor to the amplifier output.
• Switch on the supply and measure the battery voltage with a Multimeter set to about 10Vdc fsd.
• Connect the Multimeter across the positive end of C4 and the negative ground.
• Rotate R3 in order to read on the Multimeter display exactly half of the battery voltage previously measured.
• Switch off the supply, disconnect the Multimeter and reconnect it, set to measure about 10mA fsd, in series to the positive supply of the amplifier.
• Switch on the supply and rotate R6 slowly until a reading of about 3mA is displayed.
• Check again the voltage at the positive end of C4 and readjust R3 if necessary.
• Wait about 15 minutes, watch if the current is varying and readjust if necessary.
• Those lucky enough to reach an oscilloscope and a 1KHz sine wave generator, can drive the amplifier to the maximum output power and adjust R3 in order to obtain a symmetrical clipping of the sine wave displayed.

Phono Amplifier

In recent years, following CD's introduction, vinyl recordings are almost disappeared. Nevertheless, a phono preamplifier is still useful for listening old vinyl discs from a well preserved collection. This simple but efficient circuit devised for cheap moving-magnet cartridges, can be used in connection with the audio power amplifiers shown in these webpages, featuring low noise, good RIAA frequency response curve, low distortion and good high frequency transients behavior due to passive equalization in the 1 to 20KHz range. Transistors and associated components provide ±18V supply to the op-amp, improving headroom and maximum output voltage.

Skema Rangkain Phono Amplifier

Component List Of Phono Amplifier

R1_________47K   1/4W Resistor
R2________100R   1/4W Resistor
R3__________6K8  1/4W Resistor
R4_________68K   1/4W Resistor
R5,R6_______2K7  1/4W Resistor
R7__________2K2  1/4W Resistor
R8_________39K   1/4W Resistor
C1-C3_____100µF  25V Electrolytic Capacitors
C4,C5______47nF  63V Polyester Capacitors 5% tolerance
D1,D2__BZX79C18  18V 500mW Zener Diodes
IC1_______LM833  Low noise Dual Op-amp
Q1________BC337  45V 800mA NPN Transistor
Q2________BC327  45V 800mA PNP Transistor

Notes:

• R2, R3, R4, R7, R8, C4 & C5 should be low tolerance types.
• Schematic shows left channel and power supply.
• For stereo operation R1, R2, R3, R4, R7, R8; J1; C1, C4 & C5 must be doubled.
• Numbers in parentheses show IC1 right channel pin connections.

6.9 Watt Audio Amplifier Kelas A

This circuit of audio amplifier push-pull single-ended Class A is capable of providing a sound comparable to those valve amplifiers, delivering more output power (6.9W measured across a 8 Ohm loudspeaker cabinet load), less THD, higher input sensitivity and better linearity.

Voltage and current required for this circuit are 24V and 700mA respectively. The only penalty for the transistor operated circuit is the necessity of using a rather large heatsink for Q2 and Q3. In any case, the amount of heat generated by this circuit can be comparable to that of a one-valve amplifier. An optional bass-boost facility can be added, by means of R5 and C5.

Skema Rangkaian Audio Amplifier Kelas A

Component list of audio amplifier kelas A

P1_____________47K  Log. Potentiometer (Dual-gang for stereo)

R1____________100K  1/4W Resistor
R2_____________12K  1/4W Resistor (See Notes)
R3_____________47K  1/4W Resistor
R4______________8K2 1/4W Resistor
R5______________1K5 1/4W Resistor (Optional, see Notes)
R6______________2K7 1/4W Resistor
R7,R9_________100R  1/4W Resistors
R8____________560R  1/2W Resistor (See Notes)
R10_____________1R  1/2W Resistor

C1,C2__________10µF  63V Electrolytic Capacitors
C3_____________47µF  25V Electrolytic Capacitor
C4____________100µF  35V Electrolytic Capacitor
C5____________150nF  63V Polyester Capacitor (Optional, see Notes)
C6,C7_________220µF  25V Electrolytic Capacitors
C8___________1000µF  25V Electrolytic Capacitor

Q1___________BC560C  45V 100mA Low noise High gain PNP Transistor
Q2,Q3________BD439   60V 4A NPN Transistors

Notes:

• If necessary, R2 can be adjusted to obtain 13V across C8 positive lead and negative ground.
• Total current drawing of the circuit, best measured by inserting the probes of an Avo-meter across the positive output of the power supply and the positive rail input of the amplifier, must be 700mA. Adjust R8 to obtain this value if necessary.
• Q2 and Q3 must be mounted on a finned heatsink of 120x50x25mm. minimum dimensions.
• Add R5 and C5 if the bass-boost facility is required.

4.5Volt Transistor Audio Amplifier

This is a 4-transistor amplifier suitable for a variety of projects including receivers, intercoms, microphones, telephone pick-up coils, and general audio monitoring. The amplifier has a power isolation circuit and bandwidth limiting to reduce oscillations and "motorboating". The values are not particularly critical and modest deviations from the indicated values will not significantly degrade the performance.

Skema Rangkaian 4.5Volt Transistor Amplifier

Three cell battery packs giving about 4.5 volts are recommended for most transformerless audio amplifiers driving small 8 ohm speakers. The battery life will be considerably longer than a 9 volt rectangular battery and the cell resistance will remain lower over the life of the battery resulting in less distortion and stability problems.

The amplifier may be modified to work with a 9 volt battery if desired by moving the output transistors' bias point. Lowering the 33k resistor connected from the second transistor's base to ground to about 10k will move the voltage on the output electrolytic capacitor to about 1/2 the supply voltage. This bias change gives more signal swing before clipping occurs and this change is not necessary if the volume is adequate.

TIP 41 - 4 watt Audio Amplifier

This 4W Audio Amplifier circuit is powered by 2 pieces of transistor TIP41. The circuit is very simple and incorporates darlington output transistors that will provide more than enough output current than is needed to drive a 3-ohm speaker. The gain may be pre-set for a variety of input levels, making it suitable for amplifying computer and cassette-deck Line-output levels. The input level is also suitable for use with the TDA7000 receiver. All components are easily available and I will shortly be making this project available as a kit.

Skema rangkaian 4 watt audio amplifier

The circuit Parameter

Supply voltage: 8 -15 volts
Output power: 5.4 Watts
I/P for full O/P: 30 -4000 mV (RMS)
Noise O/P no I/P: 0.0005 Volts RMS
Supply current (no-signal): 50 mA
Supply Current (Full O/P): 1.9 Amperes
3dB Frequency Response: 42 - 34000 Hertz
6dB Frequency Response: 21 - 62000 Hertz
Distortion at 2-watts: 0.01 % (Vgain=10)

Data transistor TIP 41

• Collector-Base Voltage (VCBO) : TIP41: 40V, TIP41A: 60V, TIP41B: 80V, TIP41C: 100V.
• Collector-Emitter Voltage (VCEO) : TIP41: 40V, TIP41A: 60V, TIP41B: 80V, TIP41C: 100V.
• Emitter-Base Voltage (VEBO): 5V.
• Collector Current (DC): 6A.
• Collector Current (Pulse): 10A.
• Base Current (IB): 2A.
• Collector Dissipation (TC=25°C): 65W.
• Collector Dissipation (Ta=25°C): 2W.
• Junction Temperature (TJ): 150 °C.
• Storage Temperature : - 65 ~ 150 °C.
• DC Current Gain (hFE ): Max 15 - 75.

1 watt Amplifier stereo

This is a circuit of 1 watt amplifier stereo using two IC LM386N. This circuit belongs to kitsrus.com and the kit is available there or at electronickits.com. This circuit only need 10mA current with best voltage supply is 6-12VDC. No heatsink required for normal usage.

the amplifier circuit only a few external components, the IC contains most of the necessary circuitry. C1, C5 are the input coupling capacitors, which block any DC that might be present on the inputs. C2, C9 maintain DC bias levels in the gain adjustment (feed back) circuit. C4 provides power supply decoupling, and C6, C8 are the output coupling capacitors. C10, R1 and C11, R2 act as zobel networks providing a high frequency load to maintain stability where loud speaker inductive reactance may become excessive. The pot provides adjustable input level attenuation.

Skema rangkaian 1 watt Amplifier stereo

layout 1 watt Amplifier stereo

list Components :

Capacitors :
C1, C5 2.2 uF / 50Vecap
C2, C9 10 uF / 25V ecap
C3, C7 100 nF mono (104)
C4 100 uF / 16V ecap
C6, C8 470 uF / 16V ecap
C10, C11 47 nF mylar (473)
Resistors :
R1, R2 10 ohm (brown, black, black)
Pot 1 10k ohm dual gang log pot. (A)
Misc. :
Kit 115V2 Printed Circuit Board
IC 1, 2 LM386N Integrated Circuit
8 pin IC socket
2 pin header and jumper 2 sets


Specifications :

• D.C. input : 4 – 12 V at 200 – 500 mA max.
• Idle current : ~ 10 mA
• Power output : > 1 Watt max. @ 8 ohms, 12V DC, ~ 0.4 Watt RMS cont. per channel
• Freq. Resp. : ~ 40 Hz to 100 kHz, 8 ohm, < g="20"> 80 dB, (>90dBA) G = 20, > 60 dB, (>70 dBA) G = 200
• Sensitivity : > 100 mV, G=20, > 10 mV, G=200
• Input Z : ~ 10 k ohm.

.

AMPLIFIER SEDERHANA - 4 TRANSISTOR

This Rangkaian audio Ampilifier is designed to be packed into a mini-speaker box 2, 4 and 8 ohms. This circuit is also equipped with a switch-Bass Booster. can be connected to the output line walkman, mini disc, iPod, CD Player, Computer and other similar devices is its headphone output line.

This circuit of the design without using the IC by using methods that seem somewhat out of date. ampilfier the supply voltage 12v. SW1 switch will produce bass-booster, but at the same time the volume should be increased to compensate for lost power at high frequency.

Skema rangkaian audio amplifier sederhana

in use later, R9 should be set carefully in order to reduce distortions in the sound that emerged. and of course have to make 2 pieces in the circuit to generate a stereo output from this circuit.

list Component Of Audio Amplifier:
-P1: 10K Log.Potentiometer
-R1,R2: 33K 1/4W Resistors
-R3: 33R 1/4W Resistor
-R4: 15K 1/4W Resistor
-R5,R6: 1K 1/4W Resistors
-R7: 680R 1/4W Resistor
-R8: 120R 1/2W Resistor
-R9: 100R 1/2W Trimmer Cermet
-C1,C2: 10µF 63V Electrolytic Capacitors
-C3: 100µF 25V Electrolytic Capacitor
-C4,C7: 470µF 25V Electrolytic Capacitors
-C5: 47pF 63V Ceramic Capacitor
-C6: 220nF 63V Polyester Capacitor\
-C8: 1000µF 25V Electrolytic Capacitor
-D1: 1N4148 75V 150mA Diode
-Q1: BC560C 45V 100mA PNP Low noise High gain Transistor
-Q2: BC337 45V 800mA NPN Transistor
-Q3: TIP31A 60V 4A NPN Transistor
-Q4: TIP32A 60V 4A PNP Transistor
-SW1: SPST switch
-SPKR: 3-5 Watt Loudspeaker, 8, 4 or 2 Ohm impedance