This PCB from DIY-Tubes.com is based on one of THATcorp’s highly thorough and informative datasheets which accompany their 4301 VCA-based dynamics control IC. The resulting compressor/limiter is a high-functioning, transparent-sounding unit.

Features:

• Threshold, ratio, and gain potentiometers
• Hard/soft knee and Peak/RMS switches
• Requires +/-15V power supply (not included)

Price:

• $5 for PCB, $13 for 4301 chip

More Information:

• available from DIY-Tubes.com