[roginator]

OVO IMAM O STELANJU NOVOG MCI VCA MC 202 ali nije stelanje kao kod orginalnog PCBA...bar mislim

you'll need a 10K pot act as the "Fader"

Install the 4 resistors as noted above (R1010, R1011, R1003, R1006)

On the MCI Board:

Pin 1 is the input for the 1K tone from a low distortion oscillator
Pin 2 is +15vdc from bench power supply
Pin 3 is to the wiper and one outside terminal of the 10K pot (tie
together)
Pin 4 is ground: tie the other terminal of the pot here along with your
audio grounds
Pin 5 is output to distortion analyzer input
Pin 6 is -15vdc

Adjustment procedure:

Place VCA modules on fixture powered by +/- 15vdc
Set ocilliator output to 1K @0dBv and input to Pin 1
Adjust the 10k pot so that the module provides 0dB of gain (unity)
This voltage, measured at the 10K pots wiper should be around -51vdc
Adkust the pot on the VCA module for minimum THD (distortion)
The THD should be around .007% using a 30Khz cutoff.
Make the resistor changes on the other MCI VCA cards and Install
modules.