A Three-Channel Tube-Based Guitar Preamplifier

Peter Delos details how to add tone controls to a three-channel tube-based guitar preamplifier. The circuit is a versatile building block anyone can use for his or her own preamplifier applications. The project is implemented with three 12AX7 gain stages. The tone control at the final output is a standard bass, mid, treble control circuit found in many guitar amplifiers. This article was originally published in audioxpress, October 2014

Radial Engineering confirms its new Space Heater 500 tube overdrive unit is now shipping. The Space Heater 500 is a single-wide tube overdrive module for the Radial Workhorse and other 500 series racks that delivers natural crunch to drums, adds character to voice, and natural compression to bass and acoustic guitar.