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Audio Circuits:  Power Amplifiers
Audio Circuits -- Main Page

Audio Power Amplifiers:   #'s - A       B - E      F - L      M - R      S - Z

Last Updated: December 25, 2017 01:44 PM

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

1 Watt 2.3 GHz RF Amplifier using a MRF2001 -  Simplicity and repeatability are featured in this 1-watt S-band amplifier design.  The design uses an MRF2001 transistor as a common base, Class C Amplifier.  The amplifier delivers 1-watt output __ Designed by Michael Micili

1 Watt 2.45 GHz Linear Amplifier using RF Micro Devices RF2126 -  Schematic Only __ Designed by Michael Micili

1 Watt Audio Amplifier Project (Using the TAA300) -  I built this audio amplifier with the TAA 300 Integrated Circuit   (IC) to have on the work bench an independent amplifier to test audio signals coming from radio receivers or audio oscillators.  It is an excellent amplifier to drive an eight ohm loudspeaker.  You can use it, for example, as an audio amplifier for the FM one transistor receiver known as the Radio Shack Special and/or the TDA 7000 FM receiver; also to test the workings of a pulse oscillator or any other kind of audio oscillators. __ Designed by braincambre500 @ yahoo.com

1.5kW Power Amplifier -  Just the thing for those for whom no amount of power is enough __ Designed by Rod Elliott  ESP

10 Watt Audio Amplifier -  This page describes an antenna, a 1 watt final output stage, and a transformation network for radio experiments at 187 kHz __ Designed by J. L. Linsley Hood, M.I.E.E.

10 watt HF 17 meterband Amplifier -  This project and your efforts will provide you with a 0.55.3 watt input to easily 10 watt output.  The two linear amplifiers are ment for use with QRP SSB/CW/FM/AM transmitters on the amateur bands 15 and 17 meters can be powered from a 12 volt DC supply.  The design is a good balance between output power, physical size.  The completed amplifier will reward the builder with a clean, more powerful output signal for a QRP rig when radio conditions become marginal.  It has a RF-sensing circuit   (Q2) wich allows the amplifier to switch on automatically when transmitting. __ Designed by Guy Roels ON6MU

100W Guitar Amplifier -  Guitar amplifiers are always an interesting challenge.  The tone controls, gain and overload characteristics are very individual, and the ideal combination varies from one guitarist to the next, and from one guitar to the next.  There is no amp that satisfies everyone's requirements, and this offering is not expected to be an exception __ Designed by Rod Elliott  ESP

10W Amplifier using TDA2003 -  Here is the circuit diagram of a 10W audio amplifier using the popular TDA2003 IC from SGS Thomson.  The IC can easily deliver 10W to a 4 Ohms load at 18V DC supply voltage.  The IC can be also operated from 12V and that makes it applicable in car audio systems

110mW emitter follower audio power Amplifier -  Audio power amplifier circuit diagrams / circuit schematics __ Designed by Sunamura Kazuhiro

12 Volt powered, 4x15 Watt Audio Amplifier -  Using car audio chips and intended for installation inside a computer. __ Designed by Manfred Mornhinweg

15dB UHF TV Antenna Booster -  This is an UHF band TV antenna preamplifier circuit With 15dB gain to build easily.  It is formed based on BF180 UHF Transistor.  The first stage is an band pass filter constructed by the C1, CV1, L1, L4, C7 and C3, the second stage is a base-common

16 Watt Amplifier -  This circuit provides 16 watts of amplification.  it is built using two LM383 power audio amplifiers.  use suitable heat sinks with the IC's. __ Designed by Andy Wilson

18W Audio Amplifier -  High Quality very simple unit -- No need for a preamplifier __ Contact: IQ Technologies

2 Watt Amplifier -  An audio amplifier made from discrete components with 2 Watts audio power into an 8 ohm load.  Carlos has used this amplifier on his AM radio for many years. __ Designed by Carlos Feldman

2.3 GHz Power Amplifiers -  Note: quality of  text is poor. __ Designed by RL Campbell KK7B

2100W Power Amplifier with STK4231II -  Here the high power audio amplifier dual output at 100W max each output channel.  Great output power with only using single chip. 

225W Stereo Power Amplifier with STK4141II -  Here the stereo power amplifier based on single IC STK4141II.  This amplifier circuit will deliver 25W on each output channel. 

230W Audio Amplifier with STK465 -  Simple circuit with higher power output, this amplifier circuit is very easy to build.  Just look at the PCB layout of this circuit.  he active component required is just the main power amplifier chip STK465. 

20 Watt Amplifier using LA4440 -  This is the circuit diagram of a simple 19 watt amplifier using IC LA4440 from Sanyo.  It uses very less components other than the IC LA4440.  A very high quality circuit with respect to its cost and ideal for beginners. 

20 Watt Class a Power Amplifier -  A single-ended Class-A amplifier is essentially one where there is only one active driven output device.  The passive "load" may be a resistor, an inductor   (or transformer) oras in this amplifiera current sink.  Of the three basic options, the current sink offers the highest linearity for the lowest cost, so is the ideal choice.  Some esoteric   (some might say idiosyncratic) designs use inductors or 1:1 transformers, but these are bulky and very expensive.  Unless made to the utmost standards of construction, they will invariably have a negative effect on the sound quality, since the losses are frequency dependent and non-linear. __ Designed by Rod Elliott  ESP

20 Watt GaAaFET Power on 2.3 GHz -  Photocopypoor quality __ Designed by R. Berteismeier DJ9BV

20 Watt/ Channel Stereo Power Amplifier -  Based on the versatile LM1875 from National Semiconductor __ Designed by Rod Elliott  ESP

20 Watt/Channel Stereo Power Amplifier -  Based on the versatile LM1875 from National Semiconductor __ Designed by Rod Elliott  ESP

200 Watt Amplifier -  Circuit only, no description given

200W ATX PC Power Supply -  This power supply has ATX design and 200W performance.  I was drawed diagram, when I repaired this power supply.  This power supply circuit uses chip TL494.  Similar circuit is used in the most power supplies with output power about 200W

200W Audio Amplifier -  Project available from Kemo Kits __ Contact: IQ Technologies

20dB VHF Amplifier -  The amplifier is a circuit of high frequency RF with distinguishable materials.  The amplifier as circuit strengthens the tendency of signal with concrete aid, depending on the frequency of signal.  If the frequency of signal is included in the limits of spectrum of frequencies. __ Contact: IQ Technologies

20W Audio Amplifier -  This schematic is designed to operate with minimum of external components.  This amplifier offers high quality performance at very low distortion.  Project is based on National LM1875 IC.  The IC is thermal and short circuit protected. __ Designed by Rajkumar Sharma

20W Audio Amplifier using LM1875 -  20W Audio Amplifier kit is based on LM1875 IC __ Designed by Rajkumar Sharma

22 Watt Audio Amplifier -  The 22 watt amp  uses a TDA1554 two channel Audio Amp chip and is easy to build, and very inexpensive.  The circuit can be used as a booster in a car audio system, an amp for satellite speakers in a surround sound or home theater system, or as an amp for computer speakers __ Designed by Aaron Cake

23 DB Bipolar DDS Amplifier -  Some recent discussions with George Heron, N2APB and Craig Johnson, AA0ZZ regarding alternatives to using MMICs as amplifiers in DDS applications lead to the design of this 23 dB shunt feedback amplifier.  This version is setup to operate at 12-13.8 volts, but with minor changes, can be made to operate with supply voltages as low as 5 volts. __ Designed by Jim Kortge, K8IQY

25 W Bridge Amplifier  -  A superb power amplifier using TDA 2009 which can deliver a blowing 25 W rms onto a 4 Ohm speaker and 13 W rms onto a 8 Ohm load.  ICTDA 2009 is actually a 2 channel amplifier each of 13W rms on 4 Ohm.Here the two are connected in bridge format to double the output power to 25W.This circuit is designed exactly as what is said in the data sheet. __ Designed by

25 Watt MOSFET Audio Amplifier -  High Quality simple unit.  No need for a Preamplifier __ Contact: Flavio Dellepiane, fladello @ tin.it

2-9v battery-powered Amps based on the LM386. Schematic & PCB/perfboard layouts. -  For better compatibility with effects driving the Little Gem, a FET buffer can be added.  Both the Little Gem Mk II   (seen below) and Ruby schematics include a simple buffer design.  No further circuit modifications are necessary, however the input capacitor value of the amp may need to be adjusted to taste. __ Contact: holler @ runoffgroove.Com

2A3 Push-Pull Class a Stereo Amp -  The input stage is comprised of a both halves of a 6SL7 octal dual hi-mu triode in a differential amp configuration with a 1ma constant current cathode load.  I'm using field-effect   (constant-current) diodes for simplicity.  the diff amp approach was chosen for good power supply rejection, ease of balancing, good gain, and ease of application of *feedback*, if desired   (hey, i like to keep an open mind).  It also takes care of phase-splitting right up front.  Note: I've returned the constant current diode cathode to -9V instead of ground in order to avoid the non-linearities about the pinch-off region   (Vpo ~= 1.5V) __ Designed by Bob Danielak

2W / 4W Audio Amplifier using paIR of LA4100, LA4101 or LA4102 Modules -  Schematic only, no circuit description __ Designed by Petr Prause


Audio Power Amplifiers:   #'s - A       B - E      F - L      M - R      S - Z

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