The TD 226 by
Thorens is the product of over 100 years experience in the construction of
musical instuments allied tothe mastering of the most advanced technology in
the fields of fine mechanics and electronics. The main objectives of Thorens
engineers remain unchanged; robustness, reliability and life-time maintenance
of the original performance specification.
Semi-professional
Transcription Turntable with two tone arms
Features:
Servo controlled
electronic belt-drive system with DC motor - a Thorens design
Load-correcting automatic pitch contorol (APC)
Three
speeds 33⅓, 45 and 78 rpm
Precision
craftsmanship to meet the highest professional standards
Can be equipped with
two tone arms
Two electric motor
lifts
Flood light
Vacum system
optional
The Thorens floating
suspension.
Every turntable must
be damped by a suspension system to prevent the sensitive pick-up from
environmental vibration and from acoustic feedback If the springs are placed
between motor an turntable platter, they then fulfill the additional
requirement of decoupling motor vibrations almost completely from the turntable
and the pick-up system.
The turntable
platter and the tone-arm both mounted on a secondary chassis which is
resiliently suspended from the main chassis carrying the motor. Thanks to their
exclusive design Thorens transcription turntables claim rumble figures equalled
by no other drive system.
The new load
correcting circuitry APC (Automatic Pitch Control) instsntaneously compensates
for any deviation from the nominal speed. The additional friction resulting
from the use of a dust cleaning arm, for instance, varies proportionately to
the distance from the centre of the turntable platter. The APC circuit
automatically compensates for such variations.
Thorens Isotrack
TP16 Mark III tone-arm (option)
For optimum in
tracking ability it is not sufficient that a tone-arm has low bearing friction.
It is much more important that it has a low effective mass, because high mass
prevents the stylus from following the imperfections (warp or ripple) of the
record as it should do. To overcome high effective mass one can increase the
stylus force, but this results in excessive record wear.
Thorens has solved
the effective mass problem by removing any unnecessary weight from the tone
arm.
The head shell is
reduced to a shielding device, and the detachable connector is placed close to
the pivots where it has negligible influence on the effective mass. In
addition, the Thorens Isotrack is a straight arm and not S-shaped. The
necessary offest angle is independent of the arm shape.
Typical arms have
effective masses of around 15 grammes.
The Thorens Isotrack
is Half this figure, allowing it to track at the lowest possible stylus
pressures.
A special surface
treatment of the tone-arm tube - "split wave technology" - absorbs
all undesirable resonances of the tone-arm.
Friction-free
velocity -sensing electronic shut-off (option)
As the lead -out
grooves of records show a higher pitch - i.e. the grooves are further aparat
from one another - the tone arm motional speed increasses towards the center of
the platter. An electronic circuit picks up the signal produced by the change
in the tone-arm velocity and commands the motor to stop and the tone arm to
raise.
The precision
associated with Thorens turntables is further emphasised here, since the
activation of the auto stop process is not position sensitive, but fully
electronic and friction-free. The Thorens automatic stop system also enables
the operator to cue with studio precision at any point on a disc, even at the
very centre.
Another circuit
prevents the activation of the auto stop process when the tone arm is moved by
hand over the disc surface. A separate motor is used for tone-arm lift
operation.
Specifications
Drive system: 1 step belt-drive
Motor: DC motor with 72 pole tachogenerator
Speeds: 33⅓; 45; 78 rpm, electronic speed selection
Motor speed
control: electronic regulation with
load-correcting automatic pitch control
Pitch control: ±6% illuminated stroboscope
Turntable
platter: 3,2 kg zinc alloydynamically balanced
Platter
diameter: 300 mm (12")
Turntable mat: rubber or felt
Rumble
unweighted: -52 dB acc. to DIN 45539
Rumble
weighted: -72 dB acc. to DIN 45539
Wow and
flutter: ≤0,35% acc. to DIN 45507
Upon request the
TD226 turntable is available with the Thorens VCM system. This new vacuum
technology links tighty the record to the platter through suction of the air
inbetween.
TP 16 MkIII Tone Arm
Plug-in shell TP63
Effective
length: 230 mm (9")
Effective mass: 7,5 g
Stylus
overhang: 14,4 mm
Offset angle: 22°
Lateral tracking
error: ≤ 0,18°/cm of radius
Skating-compensation: magnetic force without friction
Stylus pressure
appliance: by spring
Bearing
friction: ≤ 0,15 mN (15 mp) in both
planes
Cartridge
mouting: Standard ½"
Capacitance of
cable: 190 pF ±10%
Auto stop
(option): electronic velocity sensor
Mains voltage: 117/220 V 50/60 Hz
Power
consumption: 12 watt, with flood light
25 watt
Dimensions
(WxHxD): 675 x 210 x 460 mm (with cover
closed)
Dimensions
(WxHxD): 675 x 480 x 510 mm (with cover
open)
Weight: 20 kg (according to equipment)
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