Thorens td 160 bc 2 brochure

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THOREIfi TD16OBCH

TRANSCRIPTION TURNTABLE ASSEMBLY

The superlative THORENS TDISDBCH, the leading choice in transcription turntables for the
enthusiast who wishes to select and fit his own pickup arm.

The THORENS Belt-Drive System

The THORENS motor drives the turntable platter by means of a rubber
belt, the natural elasticity of which prevents most motor vibrations from
reaching the platter and therefore the pick-up stylus.

In more than 20 years of constant development, THORENS has reduced
the very few disadvantages of belt drive to an absolute minimum bringing
it to a level of technical perfection which is not approached by any other system known today,

One particular development is the THORENS acceleration clutch, which reduces the starting time and
helps to eliminate chassis vibration and prevent the belt from stretching

THORENS has decided to retain its own unique beltedrive system as long as no better drive system is
developed in THORENS laboratories or elsewhere.

Floating Suspension

Every turntable must be damped by a suspension system to prevent the sensitive pick-up from environ
mental vibration and acoustic feedback. If springs are placed between the motor and turntable platter
they fulfill the additional requirement of almost completely decoupling motor vibrations from the
turntable and pick-up systems

The THORENS TDlBOBCH has such a double chassis system. The platter and the tone arm are both
mounted on a secondary chassis which is resiliently suspended from the main chassis carrying the
motor.

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The Drive Motor

The TD16OBCH turntable is driven by a 16 pole two~phase synchronous motor, This motor has two
identical stators which work on the rotor at an angle of precisely 90°, thus creating a perfectly circular
rotating field and resulting in optimum wow and flutter and rumble figures

This construction also assists in reducing the magnetic stray flux to a minimum, thus preventing any
disturbing hum induction on very sensitive pick»up cartridges.

As is the case with any synchronous motor, the speed of rotation is determined by the power
frequency and by the number of poles used and, therefore, this will always remain constant regardless
of aging, dirt or climatic conditions.

At a mains frequency of 50 Hz the motor rotates at a speed of only 375 rpm, with a speed of 450 rpm
at 60 Hz, and because of this low speed, both the motor rumble figure and bearing wear are reduced
to the absolute minimum,

The motor is controlled by the mains frequency, thus achieving a speed constant which may be
compared with the precision of an electric clock,

THO/TENS TDISUBC fitted with Formula [I7 Pickup Arm

The THORENS TDIGOBCH can be fitted with a variety of pick-up arms including ADC, Connoisseur,
Formula N (shown above), Grace, Hadcock, Ortolon and SME. It is supplied with a mounting board
suitable for fitting SME pickup arms, A conversion kit to enable fitting of the Hadcock GH228 arm is
available direct from Hadcock. A board suitable for the Formula IE arm is available from U.K.
distributors Mayware, Blank boards suitable for cutting to fit other arms are available from Metrosound,

TECHNICAL DATA

Drive system

1 step be! t-drive

mechanical speed selection

Motor speed control

synchronized by mains frequency

Turntable platter

32 kg Zinc alloy
dynamically balanced

Platter diameter

30 cm (12")

Wow and Flutter according
to DIN 45507

less than 0.06%

Rumble weighted

-45 (13 according to DIN 45539

Rumble unweighted

465 dB according to DIN 45539

Mains voltage

110-125 V, 210-240 V AC 50/60 Hz

Power consu mption

2.5 Watt

Dimensions (with dust cover)

43 x 36cm

Height (with dust cover)

15cm

TPsuaai

Motor 16 pole two phase synchronous - ~

motor with slip clutch Sole U K' DStflbumrs

for instantaneous start METROSOUND AUDIO PRODUCTS LTD
Speeds 33V; and 45 rpm Freedex House

4/10 North Road
London N7 QHN
Telephone 01-607 8141
Telex 264773 METROS G

THORENS m

Produced and printed by Trident Press (Sales) Ltd 01-739 1170