HI FI Preamp:  (electronic circuit added 4/05)

HI FI PreAmplifier:  (schematic / circuit design added 9/02)

High Performance Audio Applications of the LM833:  RIAA Phono preamplifier stages and active crossover ne2-rks (app note added 3/03)

IC MIC Preamp uses Jensen Twin Servo Topology:  (circuit / schematic design added 6/06)

IC PreAmplifier Challenges Choppers on Drift:  National Semiconductor Application Note   (app note added 2/06)

Intercom Preamp:  a convenient way of making an intercom is to use a loudspeaker as a microph1(added 6/06)

LM358 Preamp:  (electronic circuit added 7/03)

Low Impedance Microphone Amplifier #1:  (electronic circuit added 09/04)

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 (added 4/02)

Low Noise Microphone PreAmplifier:  (schematic / circuit design added 9/02)

Low Voltage PreAmplifier:  A low voltage preamplifier optimized for 3 Volt operation. (added 10/05)

Masthead Preamp:  (diagram added 6/03)

Microphone Preamp:  Very simple two transistor circuit (added 4/02)

Microphone PreAmplifier #2:  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 to be easy to build. That was my goal when I needed a simple external microphone preamplifier for my mixer. The performance of the circuit is nothing superior but can be used with many not so serious projects....  (added 11/05)

Microphone PreAmplifier:  (electronic circuit added 4/05)

Microphone PreAmplifier:  (electronic schematic added 8/02)

Minimalist Discrete Hifi Preamp:  (schematic / circuit design added 9/02)

Mono PreAmplifier :  (electronic Circuit diagram added 03/03)

MOSFET-Based PreAmplifier for FM Radio Dxing:  (electronic Circuit / Schematic added 10/04)

Mw PreAmplifier:  The tuning voltage is variable from 1 to 12 volts and is designed to cover the medium waveband from about 550Khz to 1650Khz. (added 6/03)