Specifications
Front Panel Size: 5.25 x 3" W
Module Depth: 6”
Input/Output Jacks: 3.5 mm (1/8”)
Amplitude Voltage Control: exponential; 100mV/dB.
Frequency Range: 0 to 20 KHz
CV Range: 0-10V
Output Level: +/-13.5V max
Power: +/-15 Vdc @+29/-29 mA
Calibration
Place the “Bias” front panel pot in the center (detent) position. Set RT1 to read 10.0V at TP1.
Troubleshooting, Repair, Warranty
If you encounter problems that you can’t solve, contact us, preferably via e-mail with a description of the problem.
Let us know what does and does not work. We can then help you get your module working. We can fix modules for
a minimum fee of $25.
The parts contained in this unit have been carefully selected and tested. They are guaranteed for 90 days from the
date of purchase. If you believe that you have a defective part (or if you have a part missing), contact us so we can
provide you with a replacement or repair.
Options
The normal control voltage range of the VCAs is 0-10V. This can be changed to 0-5V by doing the following:
Change RA (R17, 18, 19, 20) to 66.5K (four places).
Cut the RB traces (solder side of PCB) and install four 100K 1% resistors (standing up).
Change R11 to 49.9K
Change R7 to 82K.
Adjust RT1 for 5.0V (See “Calibration”.)
Channel D has 10X gain. To make this 1X, replace R8 with a 100K 5% resistor.
