PassDiy
Op-amp | DIY-Audio-Heaven
Op-Amp IC Tester Circuit
How to Make an Opamp with Transistors (BJTs)
Op-amp made from Discrete Components - Frank Milburn's Blog - Personal Blogs - element14 Community
10 Watt Audio Amplifier using Op-Amp and Power Transistors
DIY Audio Projects Forum • Help! heavy oscillation occurred within my amplifier circuit
417 Build an opamp (part 7 of 7) Spice modeling the DIY op-amp - YouTube
An Op-Amp From The Ground Up | Hackaday
discrete op-amp – Bumblebee Pro
DOA-17 Discrete OpAmp, DIY OpAmp Kit for Microphone Preamp Upgrades - FiveFish Audio
RED-25 Discrete Opamp Kit – DIY Recording Equipment
Homemade Operational Amplifier | Hackaday.io
NE5532 HIFI OP-AMP Amplifier Preamplifier Volume Tone EQ Control Board DIY Kits | eBay
Electronic Diy Kit Classic Operational Amplifier Circuit Experimental Board Op Amp Parts Integrated Amplifier Training Suite - Integrated Circuits - AliExpress
OP-AMP COOKBOOK — Part 1 | Nuts & Volts Magazine
DIY Operational Amplifier
NE4558 OP-AMP Board Preamplifier DIY | eBay
DIY Audio Projects Forum • OP-AMP NE5532 question
Homemade Operational Amplifier | Hackaday.io
Simple Op-Amp | Discrete Semiconductor Circuit Projects | Electronics Textbook
Op-Amp IC Tester Circuit
Op-amp | DIY-Audio-Heaven
DIY Operational Amplifier
