This was developed for the local WAMOD synth workshops, a few spares are available.
PCB - US$18
panel - US$20
shipping $5 per order
Two wide ranging LFOs; from approx 830 Hz down to 0.02Hz (1 cycle every 50 seconds), giving tri and square waveforms. There is also a difference rectifier onboard which gives signal corresponding to the positive and negative aspects of the difference between the two tri waves.
All thru holes components, no wiring to do.