Studer A80VU 1/2″ 2 Track Analog Recorder (Vintage) 919 Hours! with 4 Chanels of tape electronics

From Clinton Recording NYC. 919 hours.  317 1/2″ 2 track heads are i. excellent condition. 8-ch over-bridge loaded with 4 channels of tape electronics. (2 extra spares) Excellent sounding late 1970’s analog recorder, smooth transport, 15/30 IPS.  Machine will be professionally serviced and crated prior to delivery.  Shipping and crating charges TBD.  Takes up to 12.5″ Reels.  Super smooth transport

Capstan servo

The tape drive has a sturdy asynchronous high torque motor which is operated far below its maximum speed. The speed is scanned inductively, measured electronically and controlled automatically.
For measuring the actual speed, 120 grooves are cut very accurately into the outside of the motors armature to compensate for any remaining matching tolerances, the grooves are scanned by two magnetic heads set at 180° to each other the signal so derived is amplified, limited and shaped by transistors Q1 through Q4 and transmitted to a discriminator (highly constant LC series circuit) either directly or for higher speeds divided by the ratio of 1:2
It is possible to vary the motor speed by plus or -3% from the outside by means of a DC correcting signal. The stability of this drive is such that the Studer A-80 can be operated without modification on either 50 Hz or 60 Hz voltage supplies. The plug-in amplifier Boards for the A-80 had electronics for record, line amplifier, sync and meter amplifier.

Control electronics
In the interests of optimum accessibility for servicing, the whole of the tape deck control is concentrated on PC boards of identical size in a control unit-rack assembly. The rack contains the following PC boards
oscillator 1.080.399
attenuator 1.080.396
IC memory & counter 1.080.393
IC decoder and drivers 1.080.390 &.391
capstan servo 1.080.372/375
spooling motor control 1.080.383, 1.080.384
spooling motor contactors 1.080.380, 1.080.381 (these two boards are fully interchangeable)
voltage stabilizer 1.080.370

Control logic
attenuator and preamp 1.080.396.00
IC memory and counter 1.080.393.00
IC decoder and drivers 1.080.390.00, 1.080.391.00

Repro Head (1.317.135)
Record Head (1.317.130)

Outputs: XLR Balanced

Frequency Response:30Hz-18Khz @15 Ips 30Hz-15Khz @7.5 Ips

Wow And Flutter:.04% @ 15ips .06 At 71/2ips

Signal-To-Noise Ratio:61 Db At 1 5 ips 58 Db At 71/2 ips