STUDER A810 VU is a professional reel-to-reel tape recorder offering exceptional audio quality and versatility for demanding recording and playback tasks. With its advanced features and robust construction, it's ideal for studios, mastering suites, and audio enthusiasts seeking pristine sound reproduction.
STUDER A810 VU is a professional reel-to-reel tape recorder offering exceptional audio quality and versatility for demanding recording and playback tasks. With its advanced features and robust construction, it's ideal for studios, mastering suites, and audio enthusiasts seeking pristine sound reproduction.
www.reeltoreel.nl Philip van der Matten ver 1.0 30 jan 2023 page 1/7
✇ PVDM jjjjjjhjhjfgjhsldkfjghldfkjghsldfkjghsdfkjghldkfjghdkfjghlsdkfjghsldfkghsdfkjghsldfkjghlsdfkghdfghsldfkjghsldfkjghsldfkjghkdfjghlsdkfjghsldfkjghldfkjghdfkjghdfkjghldfkjg✇
PRO AUDIO AFFAIRS
✇ PVDM jjjjjjhjhjfgjhsldkfjghldfkjghsldfkjghsdfkjghldkfjghdkfjghlsdkfjghsldfkghsdfkjghsldfkjghlsdfkghdfghsldfkjghsldfkjghsldfkjghkdfjghlsdkfjghsldfkjghldfkjghdfkjghdfkjghldfkjg✇
PRO AUDIO AFFAIRS
Quick Reference Guide to Studer A810:
Page:
2 Layout of the internal cards
3 Tension gauges – for adjusting the tape tension
4-5 Calibration instruction – the short and quick version
6 Calibration sheet – to document the current calibration
7 Eprom firmware versions
www.reeltoreel.nl Philip van der Matten ver 1.0 30 jan 2023 page 2/7
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PRO AUDIO AFFAIRS
2. Layout of the internal cards
MPU Unit 1.820.780.82
Tape Deck Controller 1.810.750.81
Periphery Controller 1.810.753.00
Ch. 1:
HF Driver 1.820.713.00
Record Amplifier 1.820.712.81
Reproduce Amplifier 1.820.710.83
Line Amplifier 1.820.714.83
Ch. 2:
HF Driver 1.820.713.00
Record Amplifier 1.820.712.81
Reproduce Amplifier 1.820.710.83
Line Amplifier 1.820.714.83
Cards could have different revision numbers
!
DIP switch settings left side
DIP switch settings right side
www.reeltoreel.nl Philip van der Matten ver 1.0 30 jan 2023 page 3/7
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PRO AUDIO AFFAIRS
3. Tension gauges
60mm
97mm
60mm
A810 RIGHT
-20
-30
-40
-45
10
20
30
-10
- print on A4 paper and dimensions should be correct.
- check with the measurements in the drawing
- cut out the black beany shaped section
- install into A810 using the red screw points
- see the service manual section 3.4 for adjustment instructions
www.reeltoreel.nl Philip van der Matten ver 1.0 30 jan 2023 page 4/7
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PRO AUDIO AFFAIRS
4. Calibration instructions
Studer A810 Calibration Quick Reference
important definitions
!"!#"$#"%&'(
)*+(,++ -./-0" 1#1+2
--3--4-5
the procedure
'-34'-3-"--
1 GENERAL PREPARATORY STEPS: 4.2.1.6
Clean the tape path. Set all switches on the PERIPHERY CONTROLLER to the correct setting 4.2.9.2
check the output level
•-32678
•19--3:##;
•)*-release +*<=
•->3?'
check the VU-meter
•1+-. ,--#1+
•-. ,--9:#
•1+9-3-'21+9
?
2 REPRODUCE ADJUSTMENTS : 4.2.2
set code switch 8 on: JS 8 = 1 to enable programming
preparatory steps 4.2.2.1
•4"@7----
•19--3:##;
•A-B"release +*<=
•Creference levelD(0 dB)
reproduce level adjustment 4.2.2.2
•<6-LEVEL BB,
•-=E
•--19
•->--'4+F,&*-,B
azimuth alignment of the reproduce head 4.2.2.3
•C7D(-10 dB)
•34->G?--H5
•3-CD"2--->45
frequency response adjustment 4.2.2.4
•C@4D(-20 dB)
•-.
:2678$#"2678!"!2678I!" 2678$I!)"9#-0
•<6-TREBLE BB,
•-=E-
•->@4'4+F,&*-,B
•3-':$67(-20 dB)
•<6-BASS BB,
•-=E-
•->@4'4+F,&*-,B
3 RECORDING ADJUSTMENT : 4.2.3
tape speed 7.5 or 15 ips (or preferred studio speed). Use new (or practically new) unrecorded tape
www.reeltoreel.nl Philip van der Matten ver 1.0 30 jan 2023 page 5/7
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PRO AUDIO AFFAIRS
preparatory steps 4.2.3.1
•267-19
•BFE-B"release +*<=
record level adjustment 4.2.3.2
•<6-LEVEL RECORD 24'-
•put recorder in record mode (PvdM addition)
•-19-+F,&*24->
•,B
azimuth alignment of the record head 4.2.3.3
•#267--'4#-0<
•RECORD -
•7'43)->34"4
bias adjustment 4.2.3.4
•#267-20 -0below <
•<6-BIAS 24'-
•RECORD -
•F,&*)*J
•G3+-3-3
•3+24--0-'(!: IFA,B
record level adjustments 4.2.3.6
•267-<
•<6-LEVEL RECORD 24'-
•RECORD -
•->'4+F,&*-,B
frequency response adjustment 4.2.3.7
•line level -20 dB. <19
•<6-TREBLE RECORD 24'-
•RECORD -
•->@43-267'4+F,&*,B
•BASS REPRO -?-
•->@4267'4+F,&*,B
Cross-talk adjustment 4.2.3.8 (!)
4 SYNC REPRODUCTION ADJUSTMENT 4.2.4
not supported for 3.75 IPS; all parameters should be left at 00
preparatory steps 4.2.4.1
•>REPRODUCE AMPLIFIER 33-"K
•19
•-"4"-@7
•A-E*<'"release +*<='
•'BAB*<=1=(0 dB)
sync reproduce level adjustment 4.2.4.2
•<6-LEVEL REPRO 24'-
•-PLAY -
•-4--->--+"F,&*-,B
frequency response adjustments 4.2.4.3
•@4(-10dB) not correct (PvdM)←
•<6-TREBLE REPRO
•-PLAY -
•4LI!). 267"!)M$#).!267
•->@4'4+F,&*,B
•3-:$67(-10 dB) again not correct (PvdM)←
•BASS REPRO -?-
•-PLAY -
•->@4'4+F,&*,B
www.reeltoreel.nl Philip van der Matten ver 1.0 30 jan 2023 page 6/7
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PRO AUDIO AFFAIRS
Calibration Sheet Studer A810 26-06-2022 https://www.reeltoreel.nl
tape speed date: table of tape adjustements 2)
30 15 7 ½ 3 ¾
remarks:
ch. 1 ch. 2 ch. 1 ch. 2 ch. 1 ch. 2 ch. 1 ch. 2 CCIR NAB
REPRO level 30 AES
treble
tape A
bass
tape B
eq. 15
RECORD level
tape A SM900
treble
tape B PER528
bias 7 ½
eq.
tape A SM900
level
tape B PER528
treble 3 ¾ NAB
bass
tape A
eq.
tape B PER528
3) updated versions of this document can regularly be found at: https://www.reeltoreel.nl/ 220626
4) press ‘sync’ and read repro levels Version 2.5
Philip van der Matten
A810 S/N: ________
TAPE: A □ / B □
EQ: NAB □ / CCIR □
SYNC 4)
1) remember to put switch 8 on the Periphery Controller Card to ON first, and to return it to OFF when done entering data.
2) tape EQ is always AES (fixed) @ 30 IPS, and always NAB (fixed) @ 3¾ IPS
5) a short document describing the calibration steps is available at https://www.reeltoreel.nl/
www.reeltoreel.nl Philip van der Matten ver 1.0 30 jan 2023 page 7/7
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PRO AUDIO AFFAIRS
3. Eprom Firmware Versions
FIRMWARE.
---------
13/83 Initial release?
40/85 This software offers an improved operating comfort. Some shortcomings of the software
13/83 are a1so removed. No hardware modifications on MPU board necessary — just replace
the three EPROM's
25/86 The new software became necessary because with software 40/85 the automatic changeover
between Tape sort A and Tape sort B of the A810 Special Pilot-Version was not effective
anymore when exchanging the headblock. Some shortcomings of the software 40/85 have
also been eliminated.
For MPU PCB 1.820.780.81 and 1.820.780.82 (Layout 1.820.780.12) - hardware modification
necessary (SM page 447. Change cap for CPU reset time). Otherwise just replace the three
EPROM's only
01/88 Some minor shortcomings of the software 25/86 are eliminated. S/N 6885 onwards. This is
the preferred version!
Old boards (MPU PCB 1.810.752.00) with software 07/83: MPU-board needs to be exchanged.
Order number for MPU PCB with software 01/88: 1.810.780.22. Otherwise just replace the
three EPROM's only. See page 453 SM and onwards
46/90 mainly synchronizer related?
25/91 mainly synchronizer related? checksums: IC10 9744. IC12 FF04. IC14 E88E
You can find the firmware at https://www.reeltoreel.nl/studer/
KEYS:
-----
TRANS + LOC 1..4: store current location in that key
TRANS + FFW or REW during wind: decrease wind speed in 3 steps
TRANS + ZERO LOC: operating hours are displayed
STOP + TAPE A/B: change tape type
-
1
-
2
-
3
-
4
-
5
-
6
-
7
STUDER A810 VU is a professional reel-to-reel tape recorder offering exceptional audio quality and versatility for demanding recording and playback tasks. With its advanced features and robust construction, it's ideal for studios, mastering suites, and audio enthusiasts seeking pristine sound reproduction.
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