Modular Synthesizer VC ADSR PCBs from Blacet

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via this auction

"Bare PCB to build ADSR for modular synth. For experienced DIYers only. No parts included. No front panel available. Factory manual included. Parts list and optional parts kits available on the Blacet Research web site under the "Bargain Basement"

Basic Manual (purchasers get complete printed manual): Under the Manual tab.

Second photo shows typical assembled board. No parts are included with this item.

Blacet sold hundreds of these EGs because of the full list of useful features!
*Voltage or manual control of attack, decay, sustain, release and time base.
*Time base in five ranges: 1 mS to 4 hrs.
*Normal and inverted outputs with level control for normal. Full 10V output with internal trimmer for selecting different range.
*AD or ADSR function. Gated LFO selected by reducing sustain control to zero."