Self on Audio, 3rd Edition

Chapter 39Muting relays

(Electronics World, July 1999)

Intended title: Relay Control & Muting for Amplifiers

What could be simpler than switching a relay on and off? This depends on how closely you want to control it. Any design problem, when looked at the right way, can be made more challenging. It is usually possible to identify a parameter that can be focused on and made the subject of some creative improvement. So it is here, where the speed of relay switch-off, and hence its ability to mute turn-off transients, is examined into in depth. This article gives amongst other advice, details on how to make relays operate faster than at first appears to be possible. This is done by recognising that the simple and almost universal practice of protecting ...