Hi-Fi Preamp - Another preamp, but this one has tone controls, and all pots are PCB mounted __ Designed by Rod Elliott ESP
Hi-Fi Preamp - Designed to bring multichannel operation and microprocessor convenience to the hi-fi while maintaining high audio quality. This uses the PGA2310 to control the gain of 6 channels and was my first project to use a PIC. __ Designed by Mark Hennessy
High quality audio preamplifier (OPA2134) - An audiophile quality preamp, with full switching and programmable gain __ Designed by Rod Elliott ESP
High-Performance Microphone Preamplifier - Some recording devices, especially computer sound cards, have poor sound quality or insufficient gain when used with certain microphones. This tiny module provides a line level output from an unbalanced or balanced microphone and has very low noise and distortion. It runs off 5-20V DC, consuming just 6mA. __ SiliconChip
IC tone control preamplifier using single 741 opamp - Schematic only, no circuit description
JFET Double Balanced Mike Preamp - Based on a Design by Graeme Cohen AES Preprint #2106 __ Contact: info @ forsselltech . com
JFET Mike Preamp using Jensen JE16 Input Transformer - Schematic Only __ Contact: info @ forsselltech . com
LM358 Preamp - Another very simple audio preamp to build. all parts should be available at your very local electronics shop. __ Designed by Andy Wilson
Low impedance microphone Amplifier - The circuit is a microphone amplifier for use with low impedance (~200 ohm) microphones. It will work with stabilized voltages between 6-30VDC. If you don't build the impedance adapter part with T1, you get a micamp for higher impedance microphones. __ Designed by Peter Jakab
Low Noise Balanced Microphone Preamp - A discrete front end makes this balanced microphone preamp very quiet __ Designed by Rod Elliott ESP
Low Noise Microphone PreAmplifier - This is a design for a low noise microphone preamplifier, which is ideally suited to low impedance (600 Ohm nominal) microphones. One limitation is that it is not balanced, which is not a problem in a home recording environment, but will allow the mic lead (and case) to pick up noise with long cable runs or in a hostile environment. __ Designed by Rod Elliott ESP
Low Noise Stereo Preamplifier based NE5533 - This is the circuit diagram for low noise stereo preamplifier based on NE5533 operational amplifier. The circuit uses 2 pieces of NE5533 since there is only 2 op-amp circuits inside NE5533. This circuit is featured volume level, right/left balancing and loudness level adjustment. It will be easy to build this circuit since the components used in this circuit is not much and easy to find at electronic store.
Low Voltage Microphone Preamplifier - This is a low voltage microphone preamplifier circuit with a 1.5V power supply. The reference, with a 500 kHz unity-gain bandwidth, is used as a preamplifier with a gain of 100. Its output is fed through a gain-control potentiometer to the op amp, which is connected for a gain of 10. The combination gives a 60 dB gain with a __ Designed by Popescu Marian
Low voltage microphone preamplifier using LM10 - Circuit Only
Low Voltage PreAmplifier - A low voltage preamplifier optimized for 3 Volt operation. __ Designed by Andy Collison
Magentic phono cartridge phono preamp - Gotta stack of 'old' vinyl LPs sitting around that you'd like to play through your computer sound card or record to your new CDR-W but don't have a stereo pre-amp to do it? Then build this magnetic pre-amp with RIAA curve play back (equalization) . Make sure to use shielded wire for all your connections as well as a 9 volts battery to eliminate any AC(Hum) noise. This is a very sensitive amplifier and will output up to 350mv at 1khz for 5mv input from a magnetic cartridge. __ Designed by © Laurier Gendron, Burnaby, B.C., Canada
Masthead Preamp - I have received several requests for a masthead preamplifier for use in the VHF spectrum. The power and switching circuitry may be made independant of the frequency so here I have presented two versions of a circuit I used whilst living in England. My first circuit is a simple preamplifier showing the power arangements for conveying DC to the amplifier via the coaxial cable. The second circuit is a small modification so the antenna can still be used for transmitting. __ Designed by Harry Lythall-SM0VPO
Medium Wave Active Antenna - This circuit is designed to amplify the input from a telescopic whip antenna. The preamplifier is designed to cover the medium waveband from about 550Khz to 1650Khz. The tuning voltage is supplied via RV2, a 10k potentiometer connected to the 12 Volt power supply __ Designed by David Sayles
Microphone preamp for portable transceivers - Schematic only, no circuit description __ Designed by Guy Roels ON6MU
Microphone Preamp MC-80 - Schematic only __ Designed by va3iul
Microphone PreAmplifier - This is a simple microphone preamplifier circuit which you can use between your microphone and stereo amplifier. This circuit amplifier microphone suitable for use with normal home stereo amplifier line/CD/aux/tape inputs. This microphone preamplifier can take both dynamic and electret microphone inputs (preamplifier provides power foe electret microphone elements). The idea of this circuit is to keep the design as simple as possible __ Designed by Tomi Engdahl
Microphone Preamplifier - A low noise pre-amplifier suitable for amplifying dynamic microphones with 200 to 600 ohm output impedance. __ Designed by Andy Collison
Microphone Preamplifier with Variable Gain LM358 - Schematic only __ Designed by va3iul
Mike Preamplifier with Dynamic Compressor - Schematic only __ Designed by va3iul
Minimalist Discrete Hi-Fi Preamp - Note that the project described here has been superceeded by the new Revision A version. The new circuit uses a dual supply, and does not include the power supply. P05 is ideally suited for this new version. A preamp designed for the minimalist, and having no frills at all is the design goal for this project. It is designed as a preamp for the Death of Zen (DoZ) Class-A power amp (Project 36), and has very low levels of noise and distortion, in a minimum component count, fully discrete circuit. __ Designed by Rod Elliott ESP
Mixer & Preamplifier for String Instruments - Most of the small musical bands have up to four string instruments like guitars and violins. The signal from the transducers of these instruments should be buffered and sometimes amplified before __ Electronics Projects for You
Modular Audio Preamplifier - High Quality, Discrete Components Design. Input and Tone Control Modules. __ Contact: Flavio Dellepiane, fladello @ tin.it
Modular Phono Preamplifier - High Quality Moving Magnet Pick-up module; Two-stage Series/Shunt feedback RIAA equalization __ Contact: Flavio Dellepiane, fladello @ tin.it
Modular Preamplifier Control Center - Volume and Loudness controls; CD and Aux inputs __ Contact: Flavio Dellepiane, fladello @ tin.it
Modular Preamplifier Switching Center - Four high level inputs; Double Bar switching __ Contact: Flavio Dellepiane, fladello @ tin.it
Modular Preamplifier Tone Control - Bass and Treble Controls; Traditional or shelving frequency adjustment __ Contact: Flavio Dellepiane, fladello @ tin.it
MOSFET-Based Preamplifier for FM Radio Dxing - FM transmissions can be received within a range of 40 km. If you are in fringe areas, you may get a very weak signal. FM DXing refers to hearing distant stations __ Electronics Projects for You |