The Mini-Simplex

Ari has been publishing his DC-coupled, Modulating Bias design as the Simplex amplifier. In this article, he combines this technology with the Split Core Stereo Common Circuit transformer design he has developed, to come up with a very simple yet well-sounding amplifier build around a 6C33 and 6SN7GT. The mini-simplex delivers some 6W per channel with better efficiency than the Simplex. This new design is easy to build and is ideal to drive high efficiency (wide band) speakers.