CGS Serge Negative Slew

cgs-serge-neg-slewQuantity: 2

The Serge Dual Negative slew is one of my favorite 1970’s Serge modules.  Ken Stone now makes a PC board for it.

The output tracks the input and gives voltage-control over the rate at which the output voltage can fall.  As the output reaches zero the Pulse out goes high.  When Pulse is patched back to In, it becomes a VCO with a negative ramp shape.  An initial Rate pot and reversible CV attenuator complete the design.

The PC board is mounted above the DUSG board in the CGS Serge panel, on 1-inch nylon standoffs.  Here’s how it looks from behind.  Click image for more detail.

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