4 HP
51 mm deep
Current Draw
26 mA +12V
21 mA -12V
? mA 5V
$80 Price in €

Available as an assembled Module and as a DIY project.

No info about availability.

3x linear dc-coupled precision VCAs

A simple and space-efficient voltage controlled amplifier for processing of control voltages as well as audio with high precision and a good clean sound.

This module gives you no less than three fully independant linear VCAs with very similar response between each VCA in the same module or between modules.

The 3xVCA is great for adding extra life and dynamics to CV modulations as well as for regular audio duties such as a good sounding Amplitude Modulation all the way thru the audio spectrum.

This module requires calibration in several steps, achieved precision depends on the precision of your multimeter. It can be calibrated for either 5V or 8V CV. Assembled modules are calibrated to 1.00x gain (0dB) at 5.00V CV, that means 8.00V CV will give a 1.65x gain (4.35dB).

Kits comes supplied with PCB, front panel (PCB material), component kit, power cable and mounting screws. Solder and tools are not supplied.

The module can be modified to provide 3 output responses simultaneously (linear, exponential and sharper exponential) via a cv and signal normalling on the back of the panel component PCB, instructions for this can be found in the link below. All 3xVCA modules assembled by RYO has this modification.

Additional information, schematic and cv/signal normalling modification instructions


Ø 4.67 (6 Votes) Average Rating
submitted Feb 18th 2015, 12:33 by mindsnared | last Change May 25th 2019, 18:16 by Airell

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