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Music Tech DIY • VCF state Variable based on LM13700

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I have just finished to build this filter, the topology is inspired from the Thomas Henri VCF1, I got rid of the 3080s for an LM13700, which despite what people think, is still made in the SMD version.

It has a differential dial, a curve selector for Q, 2 inputs, 2CV and tracking and the 3 classic outputs. For the design, I've added a vu-meter and the pcb is partly backlit. For the moment it's a one-off model, which is why I'm posting in this forum...

once it's been fully validated, the first examples will be put through their paces in beta-testing and production can begin.
I will post a video overview soon.
Filter-2.jpg

Statistics: Posted by pidjyman — Tue Jun 18, 2024 2:09 pm — Replies 4 — Views 144



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