Fairchild Model 664 Vintage Analog EQ Equalizer

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Fairchild model 664 EQ. 664NLS serial 622.Fixed lo frequency, -10 to +10 in 2db steps.Hi frequency select 4 6 8 10 15 KC. -10 to +10 in 2db steps.Knobs all turn and stop at detents. Front face is clean. Barrier strip is good. Chassis case shows it's age. Inside is clean. No signs of damage or repair.This has not been tested. On the side label, "Power Input" has been blacked out with marker. This could be a passive EQ. If you're good with old Fairchild gear, here you go.This is a final sale, as is, looking for a good collector.