"preamp"-tagged Public Circuits

Split-Supply Preamp 6 PUBLIC

Split-supply guitar preamp with 3-band tone and diode fuzz.

by Kurtus | updated November 01, 2025

guitar   preamp  

M-90D TO FT-2980 Impedance Matching and Gain Circuit (Using BC547C) PUBLIC

Small circuit to impedance match a Yaesu M-90D microphone to a Yaesu FT-2980. This circuit has a preamp based on BC547C set for adequate gain. (Use "mic gain" 4-6 on the FT-2980)

by w6wwr | updated September 28, 2025

2-meter   amateur-radio   ft-2980   gain   ham-radio   impedance-matching   m-90d   preamp   rf-resistant   yeasu  

OPA134 based guitar preamp with tone control - FINAL PUBLIC

Unity gain electromagnetic and piezo with input buffering and tone control guitar preamp using OPA 2134

by p-we | updated July 05, 2022

guitar   op-amp   piezo   preamp  

Fever 6j1 Tube Pre-amp Circuit PUBLIC

English[US notation] version of a Chinese schematic for the "Fever 6j1 Tube Pre-Amp".

by jcolber2 | updated April 11, 2016

6j1   fever   pre-amp   preamp   tube  

JFET PreAmp PUBLIC

by geedeebee | updated January 07, 2014

audio   guitar   jfet   preamp   stompbox  

Single Supply Mic Amp w power supply rej PUBLIC

This circuit is a simple mic-bias circuit for single supply applications with simple power supply rejection. Use any suitable op amp with supply voltage and gain BW response for your application....

by manu | updated April 02, 2013

audio   battery-powered   compander-code   mic   mic-bias   preamp   single-supply   supply-rejection  

Single Supply Simple OpAmp gain circuit for mic test on microntrollers w A/D PUBLIC

Simple amplifier which takes mic audio input and provides gain & DC centering for single supply microcontroller input

by manu | updated March 16, 2013

analog   audio   battery   microphone   preamp   single-supply  

RIAA preamp PUBLIC

by qsaldana | updated March 14, 2013

preamp   riaa