STUDER REVOX B795 User manual

OPERATING INSTRUCTIONS REVOX B795 2

Push button POWER
Push button “33”
Push button “45”
Phono cartridge / Stylus unit
Stylus illumination
45-rpm adapter
Audio cables
Ground wire
Power cord
Push button 4 inward movement
Push button VA lowering/lifting
Push button © outward movement
Stylus brush
Electrical fuse

IMPORTANT NOTES
Protect your turntable from excessive heat
and humidity. Install it in a manner which
ensures the free convection of air through the
ventilating louvers.
There are no user serviceable parts inside the
equipment, however, should itbecome neces-
sary to open the turntable, it must first be
disconnected from the electrical current
supply. Be sure to connect the unit to AC
(50...60 Hz) mains supplies only. For opera-
tion on different supply voltages, a wire
jumper on the power transformer has to be
resoldered to cover the nominal voltages of
100/110/120 V or 200/220/240 V.
Before putting the equipment into operation,
do not forget to loosen the three transport
screws (figure 3, inner page of the cover).
WARRANTY
For equipment purchased in Belgium, the
Federal Republic of Germany, Austria and
France a special warranty application card is
either contained in a plastic envelope at-
tached to the outside of the packing carton
or is enclosed with the equipment. If this card
is missing, please request it from your dealer.
Complete the warranty application card and
return it to your national distributor who will
then send you your warranty card.
PACKING MATERIAL /TRANSPORT
Do not destroy the original packing. If you ever
have to transport your equipment, this special
packing will provide the best possible pro-
tection for your valuable turntable.
When transporting the turntable gently tighten
the three transport screws (figure 3, inner page
of the cover).
For equipment purchased in Switzerland, the
warranty responsibility rests with your dealer.
Please note that the warranty is not valid out-
side the country of purchase.
The warranty will be voided if the unit is tam-
pered with or serviced by unauthorized per-
sonnel.

OPERATING CONTROLS AND ELECTRICAL CONNECTIONS
POWER
Push button POWER
By pressing this push button, the
electric current supply is switch-
ed on. The pilot light POWER
becomes luminous. By pressing
this push button a second time,
the electric current supply will
be switched off again
Push button “33”
The operation of this button
selects the quartz referenced
platter speed of 33.33 rpm. The
Light Emitting Diode (LED) above
this button becomes luminous
when the platter has reached its
nominal speed
Push button “45”
The operation of this button
selects the quartz referenced
platter speed of 45.00 rpm. The
LED above this button becomes
luminous when the platter has
reached its nominal speed
Push button <4 inward
By pressing this button, move-
ment of the cartridge towards the
center of the turntable is effected,
provided the arm support is
swung into its operating position
Aslow movement is effected by
just tapping the button, contin-
uous pressing will result in rapid
movement
Push button WA lowering/
lifting
The operation of this button en-
ables the lowering or lifting of the
cartridge at any desired pointofa
record
Push button © outward
By pressing this button, move-
ment of the cartridge towards the
rim of the turntable is effected,
provided the arm support is
swung into its operating position,
A slow movement is effected by
just tapping the button, contin-
ucus pressing will result in rapid
movement
Linatrack” tone arm support
Turn the swivelled tone arm sup-
port over the disk on the platter
Located underneath the cover of
the tone arm supoort is the just
1% inch (40 mm) long linear
tracking tone arm.
45-rpm adapter
This adapter is provided for the
playing of 45 rpm records (sin-
gles) with large center hole
Audio cables
The cables are equipped with
phono plugs for connecting to the
phono input of the amplifier. The
plugs are marked with “L” for the
left channel and “R" for the right
channel
Ground wire
Power cord
Pick-up cartridge in the
linear tracking tone arm
The cartridge is factory adjusted
lf you intend to install another
cartridge, enquire at your dealer
about the availability of the
required installation kit
Stylus brush
Wipes off dust particles from the
stylus when swivelling the arm
support into the operating posi-
tion
Fuse
100...120 V: 0.4 AT slow-blow
200...240 V: 0,2 AT slow-blow

PUTTING THE TURNTABLE INTO OPERATION
Audio connections
Connect the audio cables to the phono input of your
amplifier/receiver
L = left channel
R = right channel
Ground wire
To avoid hum interference, connect the ground wire to
the ground terminal (screw) on your amplifier/receiver
Power cord
Connect the power cord to the AC power outlet
Switching on
Press button POWER to switch the turntable on
Swivelled tone arm support
In its rest position the swivelled tone arm support points
forward; it is swung away from the platter. In this position
the tone arm controls <, WA, P are ineffective.
Switching off
To switch off the turntable, press the button POWER,

OPERATION
Playing a 33-rpm record
Place the record onto the platter and press the button “33”
Swivel the tone arm support over the record until it locks
into a detent. The stylus illumination will thus be switched
on automatically and the platter begins to rotate. As soon
as the platter has reached nominal speed the LED 33
becomes luminous,
Press button WA lowering. The tone arm lowers itself onto
the record and the stylus illumination is switched off auto-
matically.
Playing a 45-rpm record
If the record possesses a large center hole, first place
the adapter and then the record onto the platter
Swivel the arm support over the record until it locks and
press button "45".
Press the button <4{inward) and keep it depressed until the
tone arm has been transported over the record's run-in
groove.
Press button WA (lowering).
At the end of the record, the arm will lift and return auto-
matically to its start position

GENERAL
Tone arm control
When the tone arm has reached the end of a record (run-
out groove) it gets transported automatically to its start
position, This sequence may be interruoted by pressing the
button <.
The buttons < and ® may be pressed at any time, even in
the midst of playing. They effect automatic lifting of the arm
followed by its transportation in the desired direction.
Automatic control functions
When reaching a record's run-out groove or when swivell-
ing the tone arm support away from a playing record,
lifting of the tone erm is effected and this is followed
immediately by its return to the start position. After the
tone arm has arrived at its start position the platter motor
becomes switched off. By pushing the button Wa play-
ing can be initiated again at any time. The design of the
tone arm and the floating chassis is highly insensitive to
vibrations and mechanical shocks.
Removal of cover from the arm support
For removing the cover from the arm-support, first trans-
port the cartridge to a half-way position then switch off the
electric current supply. Swivel the arm-support away from
the platter to its rest position. Reach under the sides of the
cover and while gently pulling the sides outwards lift the
cover away from the arm-support.
Tracking force/limit of vertical movement
Tracking force is optimized by factory adjustment
(screw ©).
Vertical movement is also limited by factory adjustment
(screw @). The stylus can not touch the rubber mat.
Should adjustments become necessary follow the instruc-
tions supplied with the REVOX installation kit.
Stylus replacement
First remove the cover from the arm-support. With thumb
and index finger of one hand take a firm grip on the black
part of the cartridge and carefully pull off the stylus unit
with your other hand.
When inserting the new stylus unit hold the black part of
the cartridge firmly while carefully pushing the stylus unit
into place.
Replacing a blown fuse
To replace the fuse, the turntable must first be disconnected
from the elsctric current outlet. Next, lift off the platter
from the drive motor and tighten the three transport locking
screws. Lift complete turntable on one side to make itstand
onthe opposite side. Unscrew the fuse cap and replace the
defective fuse. The required fuse ratings are listed in the
technical data section. After replacement of the fuse,
proceed in reversed order of the steps described above to
make the unit operational again

TECHNICAL DATA
Turntable drive:
Turntable speeds:
Speed accuracy:
Platter (Turntable proper):
Weight (Mass):
Run up time:
Braking time:
Wow and flutter*:
weighted:
linear:
Rumble to signal
ratios*™*:
Tone arm:
Lateral tracking angle error:
Skating compensation:
Tracking force:
Tone arm lowering:
Muting:
Tone arm follow-up:
Run-out switch:
Automatic functions:
Swivelling the tone arm
support in:
Swivelling the tone arm
support out:
Quartz referenced direct drive
33.33 and 45.00 rpm
0.01%
Diameter 12.32 inches (313 mm}
4 Ibs. 10 ozs. (2.1 kg)
better than 2 seconds at
33.33 rpm
better than 2 seconds from
45 to 33.33 rom
better than 0.05%
better than 0.1%
better than 48 dB (DIN 45539 A
weighting)
better than 50 dB (DIN 45539A
weighting plus 20 Hz high pass)
better than 70 dB (DIN 45539 B)
linear tracking tone arm with
servo-electronic follow-up
control
less than 0.5°
not required with a linear
tracking system
adjustable from 8...20 mN
(0.8...2 g)
electronically controlled,
pneumatically damped
electronically muted until the
stylus has contacted the disc
Opto-electronic sensing with
LED as light source, servo
electronics and DC motor
Automatically activated via
servo-electronics
turntable platter starts to rotate
at the selected speed
a) immediate lifting of the
cartridge
b) tone arm returns to start
position
c) turntable stops, stylus illu-
mination switched off
*measured with IEEE 193-1971 weighting and an optimally
centered, direct cut laquer, L+R
** ail rumble measurements taken in position “mono” with a
statically discharged disc and the “new” RIAA reproduce equali-
zation.
THE REVOX PRODUCT RANGE
REVOX offers a complete range of hi-fi system
components. They may be used together with
your model B795 turntable in any desired combi-
nation:
REVOX B77 tape-recorder
REVOX B750 integrated amplifier
REVOX B760 digital synthesizer FM tuner
REVOX B780 microprocessor synthesizer
FM receiver
REVOX P20 MDR
20 Hz...20 kHz +3/-1 dB
better than 2 dB
better than 25 dB at 1 kHz
40 pm/mN {static value at
recommended tracking force)
better than 85 pm at 12.0 mN
(1.2 grams)
Recommended tracking force: 12,0 mN (1.2 grams), factory set
Stylus tip radius: 5x18 ym elliptical,
nude diamond
better than 65 dB
47 kohms/470 pf
(220 pf already in cable)
Phono cartridge:
Frequency response:
Channel balance (1 kHz):
Channel separation:
Compliance:
Trackability (at 300 Hz):
Signal to noise ratio:
Recommendedioad:
Operating controls:
Turntable drive: 2 tactile feedback keys for
33.33 and 45 rpm, 1 power
switch
Tone arm: 3 tactile feedback keys for fast
inward or outward movement
plus lowering and lifting of the
pick-up cartridge; built-in stylus
iumination.
General:
21 IC's, 19 transistors, 29 diodes,
4 LEDs, 2 bridge type rectifiers
Components list:
Electric current supply 100/110/120 V + 10%,
(solder connections): 200/220/240 V + 10%
50...60 Hz
Fuse: 100...120 V: 0.4 A slow-blow
200...240 V: 0.2 A slow-blow
Weight: 20 Ibs. 1 oz (9.1 kg)
17.7x5.6x 15.6 inches
(449 x 142 x 395 mm)
height 13.4 inches (340 mm)
Dimensions (WxHxD):
Dust cover closed:
Dust cover open:
Ask your dealer for the REVOX full-line catalog.

TURNTABLE DRIVE ELECTRONICS
MOTOR ORIVER
eau ;
Lt. VOLTAGE
CONVERTER,
COMPARATOR
DRIVE ENABLE
FROM ARM ELECTRONICS
PLATTER
MOTOR
DISPLAY
ENABLE
WINDOW
COMPARATOR
SAMPLE
AND HOLD
PRO-
RAMP
—,
GENERATOR
3.072 MHz
TONE ARM ELECTRONICS Uwe tier ARM
SwiIcH SWITCH SWATCH
Cee ae eects eis : o%
RETURN FF
PRE:
‘ AMPLIFIER
LL END OF
RECORD
i ty TRIGGER
LAY '
SWITCH
TONE ARM
MOTOR
POWER
AMPLIFIER
RETURN
i
UP/DOWN
SERVO
_—
wh,
L_
:
ADVANCE
SWITCH
MUTING
RELAY
LIGHT
DRIVE ENABLE
TO TURNTABLE ORIVE ELECTRONICS

Witertiieraiticstg
WILLI STUDER
@ roll Oo fe (-lantelolnvasivair4-1a (elite!
Althardstrasse 30
WILL] STUDER GmbH
D-7827 Léffingen/ Germany
Talstrasse 7
Worldwide Distribution
REVOX ELA AG
CH-8105 Regensdorf/Switzerland
INintelaettine kim ce)