There are 41 circuit schematics available in this category. Click here for all circuit diagrams. The Last circuit was added on Thursday, 3 September 2015.Please note some adblockers will suppress the schematics as well as the advertisement so please disable if the schematic list is empty.

Filter schematics by description:

CircuitCategoryDate AddedOK?Votes 
Bat detector microphone pre-amplifiersPreamp Status3 vote up vote down
Voltage follower with 1G ohm input resistance based on LM11 opampPreampOct 21, 2009Status0 vote up vote down
Low impedance microphone amplifierPreampMar 23, 2003Status0 vote up vote down
General purchase audio preamplifier based on pair of 2N2222 transistorsPreampJan 31, 2010Status0 vote up vote down
Magentic phono cartridge phono preamp circuit diagramPreampFeb 05, 2010Status0 vote up vote down
Selection of audio preamplifiers including circuits suitable for battery operationPreampJan 31, 2010Status-1 vote up vote down
IC tone control preamplifier using single 741 opampPreampJul 03, 2011Status-1 vote up vote down
Two transistor audio preamplifier with volume controlPreampJul 03, 2011Status0 vote up vote down
Basic logarithmic amplifier using op-amp and NPN transistorPreampJul 03, 2011Status0 vote up vote down
Low voltage microphone preamplifier using LM10PreampMay 25, 2012Status0 vote up vote down
Mono audio preamplifier using single 2SC732 transistorPreampMay 25, 2012Status-1 vote up vote down
Low Noise Microphone PreamplifierPreampJun 04, 2010Status-1 vote up vote down
Collection of phono preamplifier circuitsPreampApr 21, 2010Status0 vote up vote down
Simple Car Preamplifier and Artificial EarthPreampJan 29, 2010Status0 vote up vote down
High quality audio preamplifier (OPA2134)PreampSep 13, 2006Status0 vote up vote down
Automatic Charger for Battery Operated Hi-Fi PreampsPreampJun 17, 2003Status0 vote up vote down
Basic low frequency preamplifier circuitsPreamp Status0 vote up vote down
Microphone pre-amp with high emphasisPreamp Status-1 vote up vote down
Microphone preamp for portable transceiversPreamp Status0 vote up vote down
Intercom preampPreampAug 12, 2001Status0 vote up vote down
JFET Bass PreampPreamp Status0 vote up vote down
Simple microphone preamplifierPreampJan 26, 2001Status0 vote up vote down
Simple microphone preamplifierPreampJan 26, 2001Status0 vote up vote down
Hi-Fi Preamp with remote-control and other advanced featuresPreamp Status0 vote up vote down
Balanced microphone preampPreampNov 01, 2002Status0 vote up vote down
RIAA Equalized Stereo Phono PreampPreampJun 08, 2002Status0 vote up vote down
Electret mic amplifierPreampJan 26, 2001Status-1 vote up vote down
Audio preamplifierPreampJan 26, 2001Status-2 vote up vote down
LM358 preamp circuit diagramPreampJan 26, 2001Status-1 vote up vote down
Audio preampPreampJan 26, 2001Status0 vote up vote down
Vacuum Tube Microphone PreampPreampNov 01, 2002Status0 vote up vote down
FET Preamp CablePreampNov 01, 2002Status0 vote up vote down
Altec 1564A Preamp Power SupplyPreampSep 13, 2006Status0 vote up vote down
Neumann U67 microphone preamp power supplyPreampSep 13, 2006Status0 vote up vote down
Altec 428B Microphone Preamplifier schematicPreampSep 13, 2006Status0 vote up vote down
API 321 mic preamp schematicPreampSep 13, 2006Status0 vote up vote down
RCA BA-1A two-stage preamp schematicPreampSep 13, 2006Status-1 vote up vote down
RCA BA-21A preamplifier schematicPreampSep 13, 2006Status0 vote up vote down
RCA BA-31A preamplifier schematicPreampSep 13, 2006Status0 vote up vote down
ECM Mic preampPreampJan 26, 2001Status0 vote up vote down
Hi Fi preampPreampJan 26, 2001Status-1 vote up vote down