Fairchild

670

Dynamics

Main Details
Maker Fairchild Company
Function
Channels/Tracks
  • 2 × Channel
Form Factor 19" Rackmount
Signal Path Analog Hardware
Made In USA
Date Produced 50s
Dimensions 19" rack 14" panel space 11" depth
Weight 65 lbs
Power Source 115 V, 3 A, 50-60 cy AC
Frequency Response 20 cy - 15 kcy +/- 1db
Notes INPUT IMPEDANCE: 600 ohm
OUTPUT IMPEDANCE: 600 ohm
RANGE OF INPUT LEVEL: 0 dbm to +16 dbm.
OUTPUT LEVEL: +4 or +8 dbm (+27 dbm clipping point)
GAIN: 7db
SEPARATION: A-B position: 60 db vertical-lateral position: 40 db
NOISE LEVEL: 70db below +4 dbm
INTERMODULATION OR HARMONIC DISTORTION: Less than 1% at any level up to + 18 dbm output (no limiting) Less than 1% at db limiting +12dbm output
ATTACK TIME: 0.2 ms (positions 1 and 2) 6.4 ms (positions 3,4 and 5)
RELEASE TIME: Pos.1: 0.3 s, Pos.2: 0.8 s, Pos.3: 2 s, Pos.4: 5 s, Pos.5: Automatic function of program material: 2 seconds for individual peaks. 10 seconds for multiple peaks. 25 seconds for consistently high program level.
COMPRESSION RATIO: A function of the amount of limiting as well as setting of the two threshold controls which can be set to operate at ratios from 1:2 to 1:30

TUBES: 8x 6386, 1x 6084, 1x 5651, 2x 12AX7, 2x 12BH7, 1x EL34, 4x 6973, 1x GZ34(5V4)
Controls
Parameter: 2x Input Gain (stepped)
Control Type: Rotary Pot
Range: 1 db/step
Parameter: 2x Treshold
Control Type: Rotary Pot
Parameter: 2x Time Constant (6 pos.)
Control Type: Rotary Switch
Parameter: 2x Metering (3 pos.)
Control Type: Rotary Switch
Parameter: Mode
Control Type: Rotary Switch
Parameter: on/off
Control Type: Toggle Switch

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