MusicRadar

“This unreleased circuit, hidden for decades, represents an alternate, previously unknown branch of Big Muff development”: Electro-Harmonix and JHS Pedals team …

While researching a book on the history of EHX, Josh Scott found a 50-year-old schematic from Big Muff inventor Bob Myer. He ...
Electronic Design

So…The First Stage of the K2-W Op Amp is Neither Balanced Nor Differential (Part 2)

Design analysis of the K2-W Vacuum Tube Op Amp’s design and operation reveals the mad science that created a commercial revolution in 1950s and 1960s analog computing. Op amps played a critical role ...
Electronic Design

So…The K2-W Analog Computer Op Amp Has Mad Scientists’ Fingerprints on It (Part 1)

In the first of three parts, Andy hypothesizes that the K2-W Analog Computer Op Amp’s design has some unrevealed mad science in its input-stage design. 1. K2-W Op Amp schematic from Bob Pease’s ...
Hackaday

Circuit VR: Some Op Amps

Circuit simulations are great because you can experiment with circuits and make changes with almost no effort. In Circuit VR, we look at circuits using a simulator to do experiments without having to ...
EDN

The basics of testing op amps, part 1:

A version of Part 1 appeared in the Dec. 2011/Jan. 2012 issue of Test & Measurement World. See the PDF. In January 1979, Electronic Test published an article claiming that a single test circuit that ...