AM8002 – SH05 Mixer & Ring Modulator

Overview  This is replica of the center section of the Roland SH-5 monophonic synthesizer introduced in 1976, containing both a 4 channel audio mixer, ring modulation of the first two channels and two selectable outputs per channel.

Euro Rack Module:   14HP wide
User Manual:          Download PDF

Detailed Description  The AMSynths circuit is similar to the original with the MC1496 modulator chip but upgraded with modern Op Amps. There are 3 input channels, the first two go into the ring modulator (modulator and carrier), the output of which appears on the fourth slider.

Each channel has a three way switch; Output 1, Output 2 or Both. The 8002 enables 3 audio signals, typically oscillators, to be mixed along with ring modulation and  sent to two different modules, such as VCF’s or a VCF and VCA. The slider have red LED’s but they do not indicate audio level.

There are five 3.5 mm jack sockets on the base of the front panel:

  • 3x signal inputs (INA, INB, INC)
  • 2x audio outputs (OUT1, OUT2)

Module Outcome & Availability The PCB’s were laid out in the spring of 2018 and a prototype tested in April and worked well. A small change to production modules has been made so that the input to the Ring Modulator comes directly from the inputs.  The AM8002 will be available in 2022 as a completed module and PCB set for DIY.

Copyright AMSynths 2022