"preamp"-tagged Public Circuits

RO Tube-Sovereign Preamp PUBLIC

Richter Original "Tube-Sovereign" 5-Stage Guitar Preamp

by Kurtus | updated August 27, 2026

preamp   real-tube  

RO Experimental 12V-Champ Preamp PUBLIC

Richter Original Experimental 12V-Champ Preamp for Guitar

by Kurtus | updated August 27, 2026

preamp   real-tube  

RO 6-Stage RCA Tube Preamp PUBLIC

Richter Original 6-Stage Guitar Preamp Using RCA Circuits

by Kurtus | updated August 17, 2026

preamp   real-tube  

RO 5-Stage RCA Tube Preamp PUBLIC

Richter Original 5-Stage Guitar Preamp Using RCA Circuits

by Kurtus | updated August 17, 2026

preamp   real-tube  

RO Experimental Real-Tube Preamp PUBLIC

Richter Original Experimental Real-Tube Preamp Circuit

by Kurtus | updated August 16, 2026

preamp   real-tube  

RO Tube-Type Guitar Preamp PUBLIC

Richter Original Tube-Type Guitar Preamp

by Kurtus | updated August 16, 2026

preamp   real-tube  

RO Experimental 12V-Princeton PUBLIC

Richter Original Experimental 12V-Princeton Preamp for Guitar

by Kurtus | updated August 16, 2026

preamp   real-tube  

RO Hybrid Preamp PUBLIC

Richter Original Hybrid Op-Amp + Tube Preamp for Guitar

by Kurtus | updated August 16, 2026

fuzz   preamp   real-tube  

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 July 14, 2026

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

Split-Supply Preamp 6 PUBLIC

Split-Supply Preamp w. 3-Band Tone and Boosted Fuzz

by Kurtus | updated July 07, 2026

preamp  

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