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October 31, 2014

preamplifiers

4.5 H. Magnetic P.B. Head Preamplifier :

50MHz Assistant (Preamp & Power Amp.):

ALL FET MC Phono Preamp: Phono preamp with54 and 64 dB gain and RIAA accuracy is better than0.2dB, from Borbely Audio

Audio Preamp:

Audio Preamplifier #1:

Audio Preamplifier #2:

 

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

Balanced Microphone Preamp:

Band 2 Preamplifier:

Car Preamplifier & Artificial Earth:

Computer Microphone: adapting electret microphone to soundcards with dynamic microphone inputs

Crown IC150Preamplifier:

Digital Quality Microphone Pre Ampl. Using the Model 425 OPAMP :

Dynamic Microphone Preamp :

ECM Mic Preamplifier:

Electret Mic Amplifier:

FET Preamp Cable:

FM Band Preamplifier:

Hi Fi Preamplifier:

HiFi Preamplifier:

High Performance Audio Applications of the LM833: RIAA Phono preamplifier stages and active crossover ne2-rks

LM358 Preamp:

Low impedance Microphone Amplifier #1:

Low impedance Microphone Amplifier #2:

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 Noise Microphone Preamplifier:

Masthead Preamp:

Microphone Amplifier:

Microphone Preamp: Very simple tw1o transistor circuit

microphone Preamplifier:

Minimalist Discrete HiFi Preamp:

Mono PreAmplifier :

Mustage Microphone Preamp:

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.

Phono Preamp (valve): tube design

Phono Preamps for All: a collection of Phono preamps and equalization circuits,1-of which is sure to meet your requirements

Phonograph Disc Playback Preamplifier :

Preamplifier for Microphone or guitar use: suitable for guitar or microphone use.

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SIMPLE AUDIO PREAMP:  This easy to build circuit provides good gain to weak audio signals. Use it in the front end of a RF oscillator to make an RF transmitter that is very sensitive to sound.

Simple Stereo Electret Microphone Preamplifier:

Single IC Audio Preamplifier:

Solid State Microphone Preamp:

Sound Blaster Microphone Preamplifier:

Standard Microphone Preamplifier Input Circuitry: PDF file

Stereo Tape Head Preamplifier for PC Sound Card:

SWatt RF Preamplifier:

Taos Amp Solid State Mic Preamp: simple Transformerless microph1-preamp, includes circuit board design

Transformerless Microphone Preamplifier :

Transistor Audio Preamplifier:

Tube Microphone Preamp:

Vacuum Tube Microphone Preamp: