Studer

A820

Tape Machine

Main Details
Maker Studer Company
Function
Channels/Tracks
  • 2 × Channel
Form Factor Freestanding
Signal Path Hybrid Analog / Digital Hardware
Made In United States
Date Produced 1984
Notes Equipped with 5 motors: 3 DC motors for the tape transport and 2 synchronous motors for the low-noise pinch roller unit. Rugged, high-torque motors with disc-type rotors featuring favorable control characteristics are used for the spooling functions; a top-quality closed-loop servo control system and a separate processor are responsible for the excellent drive characteristics and the new tape processing facilitites.

Actual values concerning tape tension, spooling motor speeds, and sense of rotation are supplied to the processor by non-contacting sensors. The reference values for tape tension and spooling speed are software-defined and stored in memory.

The processor control of the STUDER A820 automatically determines the moment of inertia of the mounted reels and optimizes from these values all acceleration and braking operations. The motor output stages equipped with power FETs operate in switched mode, very high efficiency, and correspondingly low heat dissipation; no cooling fans are required for the A820.
Displays/Indicators
Type: VU Meter
Indication: Channel 1 Gain
Scale: -20 to +3 db
Type: VU Meter
Indication: Channel 2 Gain
Scale: -20 to +3 db
Type: Light
Indication: Ready
Scale: On-Off
Type: Light
Indication: Rec
Scale: On-Off
Controls
Parameter: Channel 1 Record Level
Control Type: Rotary Pot
Parameter: Channel 1 Rep/Sync Level
Control Type: Rotary Pot
Parameter: Channel 2 Record Level
Control Type: Rotary Pot
Parameter: Channel 2 Rep/Sync Level
Control Type: Rotary Pot
Parameter: Play
Control Type: Latching Push Switch
Range: On/Off
Parameter: Stop
Control Type: Momentary Push Switch
Range: On/Off
Parameter: RW
Control Type: Latching Push Switch
Range: On/Off
Parameter: FW
Control Type: Latching Push Switch
Range: On/Off

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