classic dual channel pro noise-gate, works well. tested recently . whistands +4dbu levels tech. spec : sc-33. circa 1982, stereo noise gate in :10 kohms bal (1/4" trs) out : 100 ohms unbal, 600 ohm ou more load minimum (1/4" ts) max input level: +20dbv max output level: +20dbv rise time: >10v/us bandwith : 5hz to 100khz, +0, -2 db thd: >0.02% 20 - 20khz, +10dbv imd: 0.02% 20 - 20khz, +10dbv crosstalk "key" input : -85db à 1khz noise: -85db, 20 - 20khz, unity gain reglages: threshold: -40dbv to +20dbv attack time (40db gain increase): 10us to 30 sec hold : 40ms to 12 sec fade time) (40db gain decrease) : 15ms to 30 sec max atten. i : 0db to 75db
