Takaab 2VCA v1 Dual Voltage Controlled Amplifier

The Takaab 2VCA is an affordable dual linear voltage controlled amplifier in 3HP, based on the LM31700 chip. In contrast to our existing VCA-2180, the 2VCA has a near linear response, is pre-offset to be normally closed, and best of all there are two of them!
A positive voltage applied to the CV input will amplify any signal put through the 2VCA at more-or-less unity gain. So a +/-5V audio signal will be amplified to 5V if there is a +5V applied to the CV input. The 2VCA is DC coupled so it can be used to amplify voltages as well as audio signals.

We've compromised a little to allow for differences in power supplies while avoiding the need for the user to trim the zero-point on installation. This means with CVs under 0.5-1V it may not be too responsive, and conversely a 10V CV may amplify a 5V signal signal to slightly over 10 volts. This still makes for a nice responsive VCA with little setup time, at a great price.