Pico System III Analog Modular Syntesizer: Affordable & For Everyone
Moog Music Mother 32 Tabletop Eurorack format semi-modular synthesizer - Vintage King
Voltage Controlled Oscillator (VCO) for analogue modular synthesizers
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
An in depth look at the Roland Jupiter 8's VCO - Page 7 - MOD WIGGLER