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1 Watt 2.3 GHz RF Amplifier Using a MRF2001:
1 Watt 2.45 GHz Linear Amplifier:
10 Watt Power Amplifier: Simple Class A Amplifiers
100 Watt Amp Circuit:
100 Watt Guitar Amplifier #2:
100 Watt Guitar Amplifier Mk2:
100 Watt RMS Amplifier: This is a100-Watt basic power
amp that was designed to be (relatively) easy to build at a
reasonable cost. It has better performance (read: musical
quality) than the standard STK module amps that are used in
practically every mass market stereo receiver manufactured
today. When I originally built this thing, it was because I
needed a100 WPC amp and didnt want to spend any money. So I
designed around parts I had in the shop.
15 Watt Amplifier:
16 Watt Amplifier:
2 Watt Amplifier 2: Low distortion amplifier using
discrete components
2 Wire Remote Microphone Amplifier: uses special
amplifier module from Op-Amp Labs
2.3 GHz Power Amplifiers:
20 Watt GaAaFET Power on 2.3 GHz:
200 Watt Amplifier:
22 Watt Audio Amplifier: Simple stereo amplifier based
on TDA1554
2304 and 3456 MHz Power Amplifiers:
3 Band Equalizer:
30 Watt Power Amplifier: Ultra-Low distortion30-Watt
Power Amplifier
300 Watt Subwoofer Power Amplifier:
50 Watt Amplifier:
60 Watt Into 8 Ohms Power Amplifier: A simple amp to
build, uses commonly available parts and is stable and
reliable
60 Watt Power Amplifier :
8 Watt Amplifier:
8 Watt Audio Amp Based on LM383:
80 Watt Amplifier #2: Uses the LM12 chip
Active Subwoofer & Controller:
Audio Amp Output Power Limiter:
Audio Amplifier Circuits:
Audio Amplifier Output Relay Delay:
Audio Compressor: A circuit for a single-channel audio
compressor using a JFET to control the gain of a virtual
earth amplifier.
Balanced Low Noise Microphone Preamp: very low noise,
close to the theoretical minimum, high hum rejection and
variable gain with a single rotary pot, similar to that used
in many professional grade mixing desks
BiDirectional 2.4 GHz One Watt Amplifier:
BiDirectional 900Mhz One Watt Amplifier:
Binaural MICs:
Boundary Layer Dish Microphone: ideas for a directional
microphone assembly.
Computer Microphone: adapting electret microphone to
soundcards with dynamic microphone inputs
Condenser Microphone hookup:
Crest Audio LT Series LT100, LT1500 & LT2000 Schematic Set:
A commercial Class D Amplifier, complete schematics in PDF
format.
Death of Zen (DoZ) a New ClassPower Amp:
Dual JT MB C Microphone Combining Circuit: connect two
microphones to1-microph1-input
Dynamic Microphone Amplifier:
Dynamic Microphone to Electret Microphone Input:
ECM Mic Preamplifier:
el Cheapo a Really Simple Power Amplifier:
Electret Microphone Connection: how to connect electret
microphone
Electret Microphone Powering:
HeadBanger Headphone Amp:
Headphone Amplifier #1:
Headphone Monitor Amp:
Hi Fi Class D Audio Power Amplifier: The purpose of this
site is to share a pulse-width modulating Class D audio
power amplifier design with the world, in order to involve
people that have an interest in this kind of technology.
This is in effect an "open source project", i.e. the design
is open and free, and those that have the interest and
ability, are encouraged to feed back into the project.
HiFi Headphone Amplifier:
Interfacing Microphones to Computer Sound Cards:
Leach Amp 120 Watt Power Amplifier: Latest update of the
"Low Tim Amplifier", Claimed to be a very good sounding
design
Leach SuperAmp: 270-Watt Double Barreled Amplifier
published in Audio magazine
Lidström Improved ZEN I Class a FET Amplifier:
line Level Signal to Microphone Input Adapter:
Low Noise
Balanced Microphone Preamp: very low noise, close to the
theoretical minimum, high hum rejection and variable gain
with a single rotary pot, similar to that used in many
professional grade mixing desks
Low Power Audio Amplifier Based on LM386:
Making a Rugged, Connectorized Microphone From a Panasonic
Microphone Capsule:
Micro Spy With FETs:
Micro Spy With TTL:
Micro Spy With USW:
Microphone Mixer: Designed for3-dynamic microphones
Microphone Polarity Tester:
Microphone Preamp: Very simple two transistor circuit
MIDI Passthrough Circuit:
Mike Pads & Other Small Gadgets: Includes Active Direct
Box circuit
Modification of Panasonic Backelectret Capacitor Microphone
(WM GOAT DigiKey P9967 ND): This drawing describes the
conventional hookup and option where FET is connected as
source follower with3 wires to preamp.
MOSFET Power Amp: DIY high power MOSFET amplifier200
Wrms 8 ohms -350 Wrms4 ohms
Octave Screamer:
One Watt 2.3 GHz RF Amplifier Using a MRF2001:
One Watt 2.45 GHz Linear Amplifier:
One Watt Class C Amplifier:
Parametric & Subwoofer Equalizer:
Power Amp Schematic:
Quadraphonic Amplifier: This is a four channel amplifier
ideally suited for use with quadraphonic equipment such as a
Sound Blaster Live card.
Quick & Dirty Audio Amplifiers: For those of you who
like to experiment with audio and would like a "quick and
dirty" amplifier that frees you from having to figure out
the biasing resistors, this article has two for you and they
run off 9 Volts too!.1-uses an Op-Amp and the other used a
transistor.
Radio Shack Pressure Zone Microphone (PZM) Modifications:
SCMS killer Circuit:
Single Chip 50 Watt / 8 Ohm Power Amplifier: Uses LM3876
Hi-Fi amplifier IC from National Semiconductor
SoftStart Circuit for Power Amps:
Sony C 37Condenser Microphone: information with circuit
diagram
Spatial Distortion Reduction Headphone Amp:
Subwoofer Equaliser:
Subwoofer Equalizer: The Linkwitz transform circuit is a
hugely flexible way to equalize the bottom end of a sealed
loudspeaker enclosure. A speaker that is corrected using
this method is flat from below resonance to the upper limit
of the selected driver. The low frequency roll off point is
determined by the parameters of the transform circuit.
Should the enclosure size be too small and cause a lump in
the response before roll off, this is also corrected. A
conventional active crossover network is then used to divide
the subwoofer signal from the main channel signals. Note
that there is also a separate spreadsheet calculator
available for calculating component values for different
situations not handled by the original circuit.
TDA2030 8 Watt Amplifier:
Theory & Construction of Mic "Splitters":
ThermoFan To Keep Your Amp Cool:
Three Band Equalizer:
Tube Amplifier: The unit is powered directly from the
120 volt AC line, with no power transformers. Filaments are
wired in series, with the total adding up to 117 volts (35 +
35 + 35 + 12). The 35W4 forms a half-wave rectifier, which
is filtered by a three-stage RC network. The B+ for the
output stage plates and screens are taken from the second
capacitor, and the B+ for the preamp and phase inverter from
the third capacitor in the filter.
Two Watt Amplifier: Low distortion amplifier using
discrete components
Two Wire Remote Microphone Amplifier: uses special
amplifier module from Op-Amp Labs
Vacuum Tube Microphone Preamp : from January1997 EQ
Column, includes phantom power supply
Variable Amplifier Impedance: idea of being able to vary
the output impedance of a power amplifier
Voice Over Circuit: Switches automatically from sound
source to microph1-when enough sound comes in from
microphone. |
