Hello, I’m working on my first project, Sam’s Simple VCO design with the CEM3340 IC, and hoping to get some troubleshooting tips from experienced builders. I’ve built the core module, and not having success with getting an output signal. I don’t have a VCA yet, so I’m running it through an interface to amplify (Fast Track C600), but only hearing a noise floor. Any ideas what might be causing this issue? I’m assuming there’s an oversight somewhere on my part. Much appreciated.
Things I have checked:
- Resistor/capacitor values
- Continuity testing of stripboard connections w/multimeter
- Confirmed appropriate power voltages of +/- 12v w/multimeter
- I also tried using it with an ES-9 interface