ACTION - FET Compressor

A FET compressor reminiscent of the MC77. Designed to work in standard "500" racks

Input attenuator feeding input transformer
Output level control
Input and output tricolor LED metering
Eight LED GR metering
Five ratios including "All buttons in" mode
Attack and Release controls
True Relay Bypass
Stereo Linking
Compression on/off switch
Discrete signal path
For easy serviceability and tweaking, the Purple discrete opamps can be replaced with any standard discrete opamp or a DIP-8 IC.
Total Gain: 45dBu
Ratios: 2:1, 4:1, 12:1, 20:1, ?:1 ("All buttons in")
Attack time: Continuously Variable from 800 microseconds to 20 microseconds
Release time: Continuously Variable from 1.1 seconds to 50 milliseconds
Input impedance: 600 ohms
Output impedance: 600 ohms