This cat is showing off a great find: a Moog MG-1, which was made for the Realistic (Radio Shack) brand in the early 1980s. From Paul Cunningham via Facebook.
Found this Moog at the pawn shop. Already had the cat. Look it’s got all it’s slider knobs!
The slider knobs (and other knobs) do fit the industrial design of the time. And the colorful section borders suggest a precursor to Moog’s current Matriarch series. It is, nonetheless, a fully equipped analog subtractive synthesizer:
The MG-1 includes:
- Two oscillators with sync & detune, one producing either a Square or Sawtooth waveform, with the other producing either a Pulse or Sawtooth waveform.
- One 24db/oct low pass filter/VCF, that can use the envelope generator, has three-position keyboard tracking, and is capable of self oscillation.
- Three-part envelope generator, with separately adjustable Attack and Decay or Release, and selectable Sustain on or off. The Envelope Generator can be triggered by either the keyboard, or the LFO.
- Oscillator 2 can be tuned independently or hard-synced to Oscillator 1.
- Noise generator. (Digital Pseudo-Random Noise)
- Ring modulation (called “Bell Tone” this is Amplitude Modulation of VCO 1 and 2).
- Polyphonic oscillator. This is a divide-down square wave generator. It is routed to the VCF and the VCA.
- LFO that can modulate the oscillators and the filter using a Triangle, square or random Sample and Hold waveform
- Voltage controlled amplifier with Keyed, Hold, and Envelope modes (accessed via 3-way switch, misleadingly only labelled “Tone Sources” but also affects Poly signal)
- Portamento (called “Glide”)
- External Control inputs for pre-MIDI CV/Gate.