Description
Rack Mount or Table top (Shelf version with wood side panels) are available.
This 3U VU unit is suitable to any Studer Reel to Reel machine – or any other recorder – which comes without VU meters to enable control and monitor of recording and playback levels. Ensures calibrated and un-calibrated level control modes of recording and playback. VU meters can be switched between normal and “peak” modes with a simple push of a switch. In “peak” ballistics of VU meters are adjusted to show peak values of recording/playback.
The VU meter indicator circuitry is a modified replica of the Studer A80 (also A810, A812, A816) including a switchable standard VU meter mode and a peak program meter (PPM) mode. In addition, there is a switch to increase the sensitivity by 10dB. -10 VU mode is also useful when calibrating the recorder with a test tape where tones are recorded at a level of -10 dB below nominal and you do not have external audio frequency VU meter.
Unit’s “0” value for VU meters is calibrated to “normal” Studer (studio standard) level – +4dB. “0” level can be adjusted to other values – if you want so.
All parts are top quality, schematics used are from top manufacturers. Operational Amplifiers are exchangeable – mounted in sockets. We use Texas Instruments INA137PA, DRV134PA.
In the input and output sections are additional RCA sockets. You can connect signal source which does not have XLR sockets.
Please see our separate listing – VU https://www.ebay.com/itm/133448334603 unit in Meter Bridge configurations – full setup with a stand (trolley) – and side panels with a bracket – like original Studer – trolley/meter bridge version. Stand is very durable and solid – made from 2mm steel tubing. Adjustable from horizontal to vertical position in 15 deg increments. Factory powder coated in “Studer Grey” RAL 7016 yet can be coated in any RAL color. Three standard colors are Studer Grey RAL 7016, Black RAL 9005 and Metalic Aluminium RAL9006.
We provide WORLDWIDE shipping with TRACKING NUMBER.
| Specifications | |
| Analogue inputs (unbalanced) | RCA pin jacks |
| Nominal input level | -10 dBV (0.316 Vrms) |
| Maximum input level | +10 dBV (3.16 Vrms) |
| Input impedance | > 50 kOhm |
| Analogue inputs (balanced) | XLR-3 (1: GND, 2: HOT, 3:COLD) |
| Nominal input level | +4 dBu (1.23 Vrms) |
| Maximum input level | +24 dBu (12.3 Vrms) |
| Differencial input impedance | 24 kOhm |
| Analogue outputs (unbalaced) | RCA pin jacks |
| Nominal output level | -2 dBu (0.615 Vrms) |
| Maximum output level | +18 dBu (6.15 Vrms) |
| Output impedance | 100 Ohm |
| Analogue outputs (balanced) | XLR-3 (1: GND, 2: HOT, 3:COLD) |
| Nominal output level | +4 dBu (1.23 vrms) |
| Maximum output level | +24 dBu (12.3 Vrms) |
| Output impedance | 200 Ohm |
| Audio performance | |
| Frequency response | 10 Hz – 50 kHz, ±0.1 dB |
| Distortion (THD) | 0.0007 % or less |
| Distortion Plus Noise (THD + N) | 0.003 % or less |
| Power suply and other specifications | |
| Mains power | AC 100–240 V, 50-60 Hz |
| Power consumption | 10 W |
| Dimension (W x H x D) | 440 mm x 132 mm x 130 mm |
| Weight | 2.7 kg |
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Please allow two weeks for manufacturing. It is possible to order different wheels, stand color and bar diameter – please contact us if interested!
Write if you have any other questions – we can make any cart stand and dust cover for your specs! |
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Internal block diagram 
Connection example 
Measurements
Tascam UH-7000 LOOP 
CAL INP
CAL REP 
UNCAL INP 
UNCAL REP 
UNCAL REP 
STUDER A80-R 
1. VU meter calibration.
– Set the RCA / XLR switch to XLR.
– Set the Peak / VU switch to VU.
– Deactivate the RECORD LEVEL-UNCAL (Front panel) switch.
– Switch on the INP (Front panel) switch.
– Set switch 0 VU / -10 VU to 0 VU.
– +4 dBu (1,223 Vrms) signal at XLR input INPUT.
– Use potentiometer 0 on the back of the VU to set the VU meter reading to 0.
– Carry out the adjustment for channel CH1 and CH2.
– Set the switch to 0 VU / – 10 VU to -10 VU.
– At -6 dBu (0.388 Vrms) signal to XLR input INPUT.
– Use potentiometer -10 on the back of the VU to set the VU meter reading to 0.
– Carry out the adjustment for channel CH1 and CH2.
2. RCA input calibration.
– Remove the cover by unscrewing the six screws (there is a washer under the upper left screw, please do not lose it).
– Set the RCA / XLR switch to RCA.
– Set the Peak / VU switch to VU.
– Deactivate the RECORD LEVEL-UNCAL (Front panel) switch.
– Switch on the INP (Front panel) switch.
– Set switch 0 VU / -10 VU to 0 VU.
– Supply a signal of -10 dBV (0.316 Vrms) to the RCA input INPUT.
– Use the potentiometer inside the unit to set the VU meter reading to 0.
– Carry out the adjustment for channel CH1 (L) and CH2 (R).
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