PCB set to build a Saw core VCO for Eurorack Modular synthesizersDesigned by PM Foundations in United States of America
Please always use genuine ICs.
Shipping times to Europe and Australia/New Zealand are extremely long due to circumstances beyond our control. Please ask about Priority Shipping.
Summary This is a full featured SAW Core VCO. Sine, Pulse, Saw waveforms available with multiple modulation inputs and oscillator sync. All waveforms are derived from a simple saw wave core using ...Read More…
This is a full featured SAW Core VCO. Sine, Pulse, Saw waveforms available with multiple modulation inputs and oscillator sync.
All waveforms are derived from a simple saw wave core using a JFET.
This VCO is compact, filling an 8HP space, but has comfortably spaced front panel controls for ease of operation.
It can be customized to provide triangle instead of sine if needed with one simple resistor change.
This is a PCB and Panel set only. A set of 2 high quality PCBs and 1 front panel ONLY are included. You will need to purchase your own components and build your own module. Comprehensive build instructions and BOMs are provided to help you source the components needed and we even provide links to shopping carts to simplify sourcing those components. Some product photos above show COMPLETED build.
Comprehensive documentation, parts lists are provided in the documentation link for building, testing and calibrating the module.
If you want a highly accurate tracking VCO, please ensure you use very well matched transistors and also glue the thermistor and the two transistors together. The slight differences in temperature coefficients of the transistors can make the oscillator difficult to tune. If you don't need a highly accurate oscillator, you can use any transistors and even use a resistor instead of the thermistor. Here's a comment from one of our builders of a similar VCO:
"I ended up swapping the transistors from some I got in a Mouser order vs the ones I matched from a Chinese retailer. Found some that matched less then 1mv difference and Low and behold, I can tune it now!" From Dayne, Grand Forks, BC.
So: you choose.
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Shipping times to Europe and Australia/New Zealand are extremely long due to circumstances beyond our control and in some cases can take up to 2 months. Please ask about Priority Shipping if you would like a faster service.
Randy | April 23, 2019
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