This is the second in a series of articles on my TTSH Arp 2600 clone project, in which I demystify, for myself at least, the process and principles of transistor matching.

I’m about to start building a clone of the ARP 2600, a semi-modular analogue synth from the 1970s. Here’s an introduction to the project for people who aren’t already completely mental for vintage analogue synths.