TTT-Compact: Thales turntable with battery drive
The extraordinary design and performance of our tangential pivoted tonearm Simplicity (which has
become world standard), required a fitting turntable. The compact Thales turntable with batterydrive-system (TTT-Compact) is made to match the Simplicity tonearm perfectly in all aspects: technically, optically and tonally. It provides the most accurate and harmonic sound possible, in a compact
and sublime design never seen before.
Concept
Based on the experience that a turntable with its tonearm
should be one single unit, we have designed our own turntable which is manufactured in our workshop piece by piece
and meets highest requirements. We are convinced about
the sublime and compact design can provide mechanical
stability which could never be reached by a more extensive
concept. Each of the 100 parts has been carefully designed
to perform its function in the overall concept perfectly. In
this documentation we will show you some details of the technical design. But please remember the
final result is not the outcome of sophisticated details only, but the performance of the whole unit as
an ensemble.
Drive
The drive of a turntable is basically very easy: it should make
the record turning with a speed of 33 ⅓ resp. 45 rpm. The
list of what it should not do is much longer: it should not
sound or vibrate at all. It should not be influenced by the
mechanical tracking, no matter in which frequency-range. It
should not care about temperature, humidity or dust. And
finally it should be incredible constant. The human hearing
can discern 1Hz difference at its most sensitive frequency (1000 Hz). If we would have to define one
hour that accurate, we should keep a pitch of less than four seconds! For the TTT, we have realized a
drive system combining the advantages of the very traditional idle wheel drive (strength and constancy) with the benefit of the belt drive (silence and decoupling). The motor itself – a brushless DC
motor with ironless winding – provides a maximum output of 20 Watts and is mounted on a carefully
calculated decoupling element. This element keeps away all vibration from the chassis, but avoids
any axial movement of the motor. The pulley – which acts as a flywheel to compensate the motor
increments – drives the sub-platter via a precision-belt, originally made for medicine applications.
The whole drive system is completely covered by the platter.
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Bearing
The bearing of the TTT is our homage to traditional craftsmanship. The approved construction is known since more
than 50 years in the industry, while we have brought the
realization and finish to a new level by combining it with
traditional knowledge of our watchmaker. The main shaft is
made of hard chrome plated carbon tool steel. Its surface
has been hand polished step by step with basswood and
diamond-paste. The shaft runs in two sintered bronze bushings, which have been soaked and cooked with specifically made oil. This guaranties maintenance
free running for many decades. Vertically, the shaft ends up in a spherical carbide metal piece, lying
on a hardened steel ball. The whole bearing is put inside a body made of ductile cast iron. This material has extraordinary damping qualities and keeps away any noise from the main chassis.
Platter
The platter of the TTT has two important tasks: it enlarges
the rotating inertial mass and provides the underlay for the
record. The complete mass of the platter is 6.5 kg, but by
concentrating the rotating mass at the outside diameter, the
inertial properties are equal to a massive platter of 8 kg. The
platter is tuned to one single resonance frequency and efficiently damped by a customized lead-vinyl inlay. This inlay is
at the same time the mat the record is lying on. After choosing the material of the mat by listening tests, we have proved its function by measuring the vibration
of the bare platter compared to the damped one. As you can see in the picture above, the – quite
high – resonance frequency of the platter (upper curve) is completely damped away with the mat
(lower curve). But in all this, the main signal is kept very precise; there is no flattening or blearing,
usually known as «overdamping».
Spikes
The spikes look quite common from outside, but the secret
of the decoupling and leveling mechanism is inside. The
spikes make the turntable standing on balls, keeping it in
position by a small rubber element. This keeps horizontal
vibration of the ground away efficiently. The leveling mechanism is a combination of a machined thread with a high
precision sliding fit. This makes leveling of the unit easy,
secure and precise, while preventing any play or unstable standing. Depending on the base and environment, we do recommend our air-suspension base Levi-Base.
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Electronics
The electronics has been developed especially for our turntable. It is a closed loop controller which keeps the speed of
the motor constant. The feedback of the brushless DC-motor
is compared with an extreme precise reference voltage,
which makes the drive unit significant more accurate than a
pll-system with quartz controlled oscillator. The outstanding
feature of the TTT-Compact is the battery based power supply with LiFePo accumulators, using nano-technology. The
peak capacity is higher than 1kW while using not one single vibrating element. Therefore it is possible to integrate the power-supply into the main chassis, keep the signal-path short and skip any connection to the power plant. The battery service life is 16 hours, switching between playing- and
charging-mode is to be operated manually.
Technical Specifications:
Turntable Specifications:
- Turntable speed: 33 ⅓ rpm, 45rpm
- 3-phase motor underneath platter
- Wow and flutter at 33 ⅓ rpm, DIN45 507: ±0,06%
- Short belt drive system with flywheel
- Rumble: -60dB (unweighted)
- High-precision bearing, hard chrome-plated
- Output-terminals: RCA / XLR / direct wiring
- Lead-vinyl-mat between platter and record
- Weight: 16 kg
- Decoupling ball element feet
- Size: 432 x 312 x 91mm
- Integrated drive electronics
- Input voltage for charger: 100-240V, 50-60Hz
- Clamp with lead-vinyl-inlay
- Battery service life: 16h
- Black finish with silver edges
Options:
- Additional tonearm-base (9”…12”)
- LEVI-Base with air suspension
Contact:
HiFiction AG
Stäffelistrasse 6
8409 Winterthur
Switzerland
Tel: +41 52 202 43 12
www.tonarm.ch
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