Behringer System 100 110 Synth Voice with VCO, VCA and Filter at Gear4music
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Erica Synths Pico System III Desktop – Thomann België
Taidacent VCO RF Transmitter Module MAX2606 Audio Input Differential or Single-Ended Output Adjustable Frequency 45MHz to 650MHz Integrated IF VCOs with Differential Output: Amazon.com: Car Electronics
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Taidacent VCO RF Transmitter Module MAX2606 Audio Input Differential or Single-Ended Output Adjustable Frequency 45MHz to 650MHz Integrated IF VCOs with Differential Output: Amazon.com: Car Electronics
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EricaSynths - DIY Synth Voice
How to Build the AI011 DIY Analog VCO Eurorack Module
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Frequency Central CEMosc PCB/AS3340/panel - Doepfer DIY - VCO Curtis oscillator | eBay
How to Build the AI011 DIY Analog VCO Eurorack Module