circuit wiring

200W Power Amplifier circuit diagram

Doing so it is necessary to mount the transistors and the IC’s insulated (with mica washes and plastic nipple). Please make sure before first operation that the transistors and the IC’s really do not have any electrical connection towards the cooling plate! The transistors have to be placed plane and firmly onto the cooling element! It is of extraordinary importance with this high-power amplifier that there is a considerable heat dissipation. The already mounted cooling element should be situated in a well ventilated case.
The PSU should be sufficiently powerful, power consumption of the amplifier may increase up to 5A. In case of using an unstabilised power supply. It is advisable to place a transformer of max 28V.
The amplifier will the show approx. 120W at a 4-Ohm loudspeaker, for it no-load voltage of the power supply will not be to high. If it is desired to use complete power, it is necessary to place a stabilised power supply with approx. 36V 5A. No-load voltage should not pass over 44V!
The cables leading the current supply and to the loudspeakers should have at least a cross section of min. 1.5 mm^2. The connected loudspeaker have to be equiped according to the high output power and should not have a lower impedance as 4 Ohm! With lower connection impedance and short circuit within the loudspeaker wiring, the transistors will be destructed.
The amplifier has an input sensitivity of approx. 500 … 800 mV. Therefore, it is possibile to connect directly at the amplifier tape decks, tuners, etc. In case there are connected signal sources with lower output voltage, it is necessary to pre-connect a preamplifier. Then it will alse be posible to connect microphones, etc.

200W audio amplifier PCB

Audio power amplifier components

IC1, IC2 = 2 IC’s TDA2030
T1, T3 = 2 transistors KT818 or BD708
T2, T4 = 2 transistors KT819 or BD705
C1, C2, C3, C4, C7 = 5 capacitors 150 nF
C5 = 1 elca 10uF 63V
C8 – 1 capacitor 1.8 nF
R1, R7, R9 = 3 resistances 100K
R2, R3, R10, R11 = 4 resistances 2.2 Ohm
R4, R5 = 2 res. 2K
R6, R8 = 2 res. 1 Ohm
R12, R13 = 2 res. 2 res. 3.3K
D1…D4 = 1N4001, 1N4002, 1N4003
1 PCB board approx 56×51 mm

In the circuit diagram shown, BA5406 is configures to deliver 5×2 watts into 4 ohm loudspeakers at a supply offer voltage of 9 volts. Capacitor C3 is a power supply filter capacitor. C11 and C12 are input DC decoupling capacitors for the left and right channels. C3 and R2 forms a Zobel network for the left output whereas C6 & R3 forms identical for the correct channel.

Purpose of the Zobel network is to cut back oscillations and improve high frequency stability of the amplifier. Potentiometers R5 and R6 serves as the quantity control for the left and right channels. CapacitorsC4 and C8 couple the outputs of the amplifier to the speakers. C9 and C10 are noise filtering capacitors. C1 and C5 are bootstrap capacitors for the left and right channels.

This is a one watt dwelling stereo amplifier module project the use of the KA2209 IC from Samsung, which is equal to the TDA2822. It functions from three-12V DC & will work from a battery because the dormant current drain is low. It requires no warmth sink for standard use. The enter & output are both floor referenced. Maximum output will most probably be bought with a 12V energy supply & 8 ohm speaker, on the other hand it is suitable for driving headphones from a provide as low as threeV.

The Specifications of the house stereo amplifier :

D.C. input : 3 – 12 V at 200 – 500 mA max
Idle current : approx. 10 mA
Power output : > 1 Watt max. 4-8 ohms, 12V DC
Freq. Resp. : approx. 40 Hz to 200 okayHz, 8 ohm, G=10
THD : < 1 % @ 750 mW, 4-8 ohm, 12V
Gain : approx. x10 (20 dB) OR x100 (40dB)
S/N ratio : > eighty dB, G = 20 dB
Sensitivity : < three00 mV, G = 20 dB
Input Impedance : approx. 10 ok ohm

Description 

The achieve is adjustable from ten to one hundred, i.e. twenty to 40 dB. Start with remarks resistors R1 and R3 of 1k ohm, this could give a gain of ten which should be adequate for many applications. In case you need more gain, you can eliminate resistors R1 and R3.This will provide a gain of about 100, or 40 dB.The enter attenuation can additionally be adjusted by means of the potentiometer which can be utilized as a quantity keep an eye fixed on. The IC achieve ought to be okept as low as important to perform full output, with the in put potentiometer and your sign source at maximum.

Voltage Gain = 1+ R1/R2 = 1+R3/R4, however the utmost acquire without a outdoor comments is about a hundred, or fortydB. (GdB = 20log Gv)

This will okayeep the signal to noise ratio as high as feasible. Additional acquire supplied via the amplifier will cut again the S/N ratio by using a identical quantity, since the input noise figure is continuing. Other values for R1 and R3 of between 1k and 10k ohm can be used if an intermediate acquire level is necessary.

If riding a pair of headphones, you too can want a a hundred ohm resistor in sequence with each output to lower again the output stage, relying on headphone impedance & sensitivity. Make positive you begin with the quantity proper all the way down to test. Numerous headphones is additionally pushed from the amplifier in the experience you wish, considering most headphones have as a minimum sixteen ohm impedance, or extra frequently 32 ohm.

There are only some out of doors phases, the IC comprises many of the essential circuitry. R1,R2 and R3,R4 are the feedback resistors. C1 offers power provide decoupling. C2 and C3 are the enter coupling capacitors, which block any DC that might-be existing on the enters. C4,C5 block DC within the feed again circuit from the inverting enters, and C6,C7 are the output coupling capacitors. C8, R5 and C9,R6 act as Nobel networks providing a excessive frequency load to handle stability at frequencies the place loud speaker inductive reactant may turn out to be extreme. The pot offers adjustable input degree attenuation.

TDA2030 amplifier circuit using the BTL system has a 100W output power and voltage of +15 V,-15V 0. Amplifier circuit you can see below.

LONDON (Reuters) - Jim Marshall, dubbed the "Lord of Loud" for his pioneering work on guitar amplifiers used by some of the greatest names in rock music, has died aged 88.

A spokeswoman for the company he founded said he passed away in Milton Keynes, southeast England, on Thursday morning. She could not confirm reports that he had been suffering from cancer and had a series of strokes.

"It is with profound sorrow that we announce the passing of our beloved founder and leader for the past 50 years, Jim Marshall," said a statement on his companys website.

"While mourning the Guvnor though, we also salute a legendary man who led a full and truly remarkable life."

Tributes poured in for a man credited with helping to shape the sound of guitar rock.

"The news of Jim Marshall passing is deeply saddening," former Guns N Roses guitarist Slash said in a message on Twitter. "R & R will never be the same w/out him. But, his amps will live on FOREVER!"

His company said in a written tribute: "Your memory, the music and joy your amps have brought to countless millions for the past five decades and that world-famous, omnipresent script logo that proudly bears your name will always live on."

TOWNSHEND, HENDRIX AMONG EARLY CLIENTS

Marshall is revered as one of the four forefathers of rock music equipment along with Leo Fender, Les Paul and Seth Lover.

Born in London in 1923, he started out as a drummer before going into business and founding Marshall Amplification in 1962.

In around 1960, a young Pete Townshend, later lead guitarist for The Who, first suggested to Marshall that he expand his music shop to sell guitars and amplifiers as well as drums.

According to an interview Marshall gave several years ago, the London store quickly turned into a "rocknroll labour exchange", and Marshall hired an engineer employed by a record label to help him build prototype amplifiers.

Marshall rejected the first five attempts but was happy with the sound of the 6th -- he received 23 orders for the new equipment on the first day alone.

Legendary musicians including Jimi Hendrix and Eric Clapton were among the early Marshall amp users.

When Hendrix walked into the store, Marshall recalled thinking to himself: "Bloody hell, heres another American guitarist wanting something for nothing."

But the guitarist paid the full price for everything he purchased without delay.

Marshall was awarded an OBE honor for services to the music industry and to charity, and he has donated millions of pounds to "worthy causes", according to his website.

They included the Royal National Orthopaedic Hospital in Stanmore where he was reportedly treated for tuberculosis as a child.

(Reporting by Mike Collett-White, Editing by Christine Kearney)

© Thomson Reuters 2012 All rights reserved.

Source:http://ca.reuters.com/article/entertainmentNews/idCABRE8340M220120405?pageNumber=2&virtualBrandChannel=0&sp=true

BA1404
transmitter includes onboard RF amplifier for increased transmitting
range. Operating voltage range is 1-3V, the circuit contains FM stereo
mixer, 38KHZ oscillator, FM modulator and high-frequency amplifier
monolithic integrated circuit. As the electronic newspaper BBS there
are many users requiring detailed information on the FM stereo
transmitter, so I re-collect the relevant information on the simple
discrete, merge, integrated FM stereo transmitter experiment, that
BA1404 with μpc1651 mix of the most easy to make and debug, and very
high frequency stability (relative to the previous circuit BA1404),
transmission power is increased by UPC1651RF amplifier.

Dayton Audios DTA-1 has the hub of a serious player into a really portable package. A group-T imperfection lets the DTA-1 crop imaging, dynamics, and sound quality so as to rivals tube amps. Up to 15 watts for every channel is on tap to endorse bookshelf speakers.

Circuit diagram :


Notes :

• Assembling the circuit on a good quality PCB is a must for obtaining optimum sound quality.
• Use 12V DC for powering the circuit.
• The ICs must be fitted with adequately sized heat sinks.
• R3, R4, R12 and R13 serves as volume controllers.
• K1 to K4 can be 4 Ohm, 20W speakers.
• This amplifier circuit can be used in a variety of applications such as car audio systems, home theater systems, personal audio systems, public address systems etc. link

This automobile stereo amplifier project is a class AB audio power amplifier using the Hitachi HA13118 module. It not only can be used in automobile application but also in any transportable or home amplifier process. It is simple to construct & has a maximum of outside parts. The module has a high power output from a low voltage supply using the bridge tied load system, & a high gain of 55dB.

This project will be useful in applications where the input signal is a low level, without requiring the use of a separate pre-amplifier. This IC module has a built in surge protection circuit, thermal shutdown circuit, ground fault protection circuit & power supply fault protection circuit making it reliable.

The Specifications of this project 
D.C. Input : 8 – 18V at 1-2 A

Power output : 18W maximum, 4 ohm load, 18V DC supply

S/N ratio : > 70 dB

THD : < 0.2% @ 1W

Freq. Response : ~ 30 Hz to 30 kHz, –3 dB

Input level : < 25 mV, for full output (G > 50dB)

Input Impedance : ~ 30 k ohm

The supply voltage necessary for this project is 8 -18V DC, at least one to two Amps. Maximum output power will only be obtained with a power supply of 18V at greater than two A, using a four ohm speaker. The power supply ought to be well filtered to reduce mains hum, a regulated supply will reduce noise even further. Additional filtering is unnecessary if operating from a battery supply.

Circuit Diagram Description

Most of the circuitry is contained within the amplifier module. C10 is the input coupling capacitor and blocks DC from the input. C11 bypasses any RF which may be present at the input. C1 & C2 provide an AC ground for the inverting inputs of the IC. R1/C7 and R2/C8 provide a high frequency load for stability with difficult speakers. C five & C six provide bootstrap feedback for the IC. C9 & C12 provide power supply filtering.

An externally mounted logarithmic potentiometer of between 10k ohm and 50k ohm, is used depending on the desired input impedance. The impedance ought to be keep as high as feasible for a guitar amp, unless using a separate pre-amp. Make sure-that the heat sink is mounted to the module.