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

Features:

• 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.

Specs:

• 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