Compact 6HP VCO for Eurorack Modular synthesizers based on the classic Thomas Henry design

This is a compact Triangle Core VCO based on the popular Thomas Henry VCO-1. You can install your classic CA3080 OTA chips or use a modern LM13700 instead. The PCB has the option to use either chip.

Read about Thomas Henry's design here: http://www.birthofasynth.com/Thomas_Henry/Pages/VCO-1.html

Read about the widely available NTC thermistors we use in our designs to save you money over expensive PTC "tempco" resistors: http://schmitzbits.de/expo_tutorial/index.html

This VCO has been shrunk to the minimum size possible so you can maximize the remaining space in your rack. Only 6HP wide but packing in a wealth of functionality:

Triangle, pulse and sine wave forms
1/V octave input + variable Linear FM CV and variable Exponential FM CV
Adjustable pulse width and variable PWM CV input
This is a low component count project so you can have high quality VCOs in your rack with minimum expense.

Build it yourself - FOR EXPERIENCED SOLDERERS ONLY - This is a set of one high quality PCB and a front panel ONLY for users who want to purchase their own components and build their own module. Some product photos above show COMPLETED build.

Comprehensive manuals, parts lists and component shopping carts are provided in the documentation link for building, testing and using the module.

https://www.tindie.com/products/pmfoundations/3080-vco-eurorack-pcb-set/

• ? mA +12V
• ? mA -12V
• ? mA 5V

Module is available as a DIY project only.

This Module is currently available.