DUAL CS 1237 (1977)

Function and regulation:

Operation in single and multi play mode

Balancing of the tonearm

Setting of the stylus pressure

Anti-skating  mechanism

Cue control shock-free

Pitch control and calibration of Pitch control

This is our lowest-priced turntable, yet we confidently invite you to compare it with anyone else's highest-priced turntable. Your're not likely to find a tonearm that seriously matches the CS1237's with its four-point gyroscopic gimbal suspension and all th eother design features with other Dual tonearms.

You might, in fact compare the CS1237 tonearm with one of the more exotic separates. You'll find they cost as much as the entire CS1237

Among the CS1237's many features are the folowing:

The cueing system is damped in both directions to prevent bounce.

Pitch  control is variable over a 6 percent range.

The strobe platter is die-cast aluminum and machine-balanced.

Vertical-bearing friction is astonishingly low-less than 8 milligrams. it can track as low as 0,25 gram - which means it will allow any cartridge to operate at its own optimum tracking force.

And if you compare the CS1237 with the higher-priced Dual turntables you'll find they have additional refinements, but no difference in design integrity or manufacturing quality.

The CS 1237's tonearm is mounted in a four-point gyroscopic gimbal-widely acknowledged as the finest suspension system available. The tonearm is centred, balanced and pivoted exactly where the vertical and horizontal axes intersect.

From pivot to tonearm head, the shape is a straight line, the shortest distance between those two important points. Curved tonearms may look sexier, but at the cost of extra mass, less rigidity and lateral imbalance - none of which is consistent with good engineering practice.

Tracking force is applied by a flat-wound spring coiled around the vertical pivot, and this force is maintained equally on each groov wall whether or not the turntable is level. The tonearms's perfect balance is maintained throughout play.

By contrast, tonearms which apply tracking force by shifting the counterweight forward are actually unbalanced during play and prone to mistracking. For example, on warped records the stylus tends to dig in on the uphill side of the warp and to lose contact on the way down.

Vertical-bearing friction in the CS 1237 tonearm is astonishingly low - less than 8 milligrams. It can track as low as 0,25 gram - which means it will allow any cartridge to operate at its own optimum tracking force.

There's  still more. The counterweight is carefully damped to attenuate tonearm resonances. Anti-skating is separately calibrated for all stylus types. Cueing is damped in both directions to prevent bounce. And because the CS 1237 can play up to six records in sequence, the stylus angle can be set for optimum vertical tracking in either single-play or multiple-play.

To find any other tonearm that seriously matches the CS 1237's, you have two choice.

You can consider one of the more exotic separates. But you'll find they cost as much as the entire CS 1237 (price: less than $180, complete with base and cover)

Or you might compare it with one ofthe higher-priced Dual turntables. You'll find a few additional refinements, but no difference in design integrity or manufacturing quality. Which is why no other turntable quite matches a Dual , any Dual

all Dual tonearms are mounted in this four-point gyroscopic gimbal. Tonearm mass iscentered and pivots precisely where the vertical and horizontal axec intersect

Straight-line tubular shape of all Dual tonearms provides maximum rigidity with low mass. Offset angle of tonearm head achieves lowest angle of tonearm head achieves lowest possible horizontal tracking error. Curved lonearms with the same effective lengh require more mass

Technical data

Drive:  Dual 8-pole synchronus motor with precision flat beltfor flywheel drive

Power Consumption:  ‹ 10 watts

Current Drain:  64 mA approx. at 220 V, 50 cycle;  115 mA, at 110 V, 60 cycle

Platter:  non-magnetic, detachable ;  1,00 kg, 270 mm diameter

Turntable Speeds:  33⅓ and 45 rpm

Automatic tonearm set-down coupled to speed adjustment

Pitch Control Variation:  adjustment range of approx. 1 semitone (6%) at both turntable speeds

Total Wow and Flutter:  less than ±0,10 % (according to DIN 45 507)

Rumble:  unweighted  better than 40 dB,  weighted  better than  60 dB

Tonearm:  Torsion-resistent tubular aluminium tonearm in four point gimbal

Tonearm Bearing Friction:  (related to stylus tip)

Vertical :  less than 0,08mN (0,008 g)

Horizontal :  less than 0,16 mN (0,016 g)

Cartridge Holder:  removable, accepting any piezo-electric cartridges with ½"mounting and a weight from4,5  to 10 grams (including mounting hardware)

Stylus Pressure:  from 0 - 50 mN (0 -5 g) infinitely variable, operable from 5 mN (0.5 gram) stylus pressure up.

Adjustable Overhang:  5 mm

Cartridge:  see separate data sheet

Power Supply:  AC, 50 or 60 cycle, changeable by changing motor pulley

Power Supply Voltage:  110-125 V or 220-240 V, switchable

Dimensions: 

Chassis: 13 x 10¾ inches; 

Base: 16½ x 14½ x 3½ inches;

Height with cover:  7¼ inches

Weight:  approx. 4,6 kg