What is stereo?




There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.



H.H. Scott '59





Lenco L 75

 The Lenco L75 record player is a precision instrument of true Hi-Fi quality which will satisfy even the most demanding music lover. The instrument can be used for stereo as well as monophonic listening.
The usual speeds of 16²/₃; 33¹/₃; 45 and 78 RPM can be pre-set in click stops and the speed can also be varied continuously from 30 to 86 RPM.
 The light tonearm of the L75 is a first-class example of fine mechanical precision, and guarantees clear, undistorted sound reproduction, with the greatest possible protection for your records. The tonearm is lowered onto the record by a hydraulically damped lowering device - thereby eliminating the possibility of record or needles being damaged whilst putting the tonearm onto the record.
 Technical Description
The very silent 4-pole motor is spring mounted onto a rigid steel baseplate. The dynamically balanced turntable is made of die-cast zinc, and weighs 4 kg.
The power is transmitted from the conical motor shaft to the turntable by arubber covered idler whell. The speed is changed by moving the idler wheel on the motor shaft.
The miniature ball-bearings fitted into the tonearm allow for a free sideways movement, and the knife-edge bearing keeps friction to a minimum.
 An adjustable sliding weight enables one to set stylus pressure exactly to suit the cartridge being used. An automatic brake comes into operation when the turntable is switched off. All tonearms can be supplied with an anti-skating device.
Every L75 is supplied with a centre piece for records with a large centre hole, a stroboscope disc for exact setting of speed, a stylus-adjusting gauge for accurate setting of stylus overhang, a set of shock-absorbing mounting supports and a cut out template (only required for chassis model).
Specifications
Type:  Single record player
Drive:  Idler drive
Motor:  4-pole synchronous with conical axis
Speeds:  Four speeds 78, 45, 33-1/3 and  16-2/3
Fine Speed Regulation: Yes, continuously adjustable
Wow and Flutter:  ±0,08% / ±0,4%
Rumble:  36 dB (unweighted);  60 dB (weighted)
Plater:  Zinc-alloy
Diameter :  306 mm
Weight :  3,7 kg
Tone-Arm:
Lenght:  227 mm
Overhanging:  17 mm (adjustable)
Offset Angle:  23°12' (±0,8° max.)
Material:  Tubular Aluminium
Stylus pressure:  0,5 g
Design:  Power Requirement:  110 - 220V AC, 50/60 Hz
Finish:  Polychromatic Dark Grey and Silver
Dimensions:  445 x 335 x 150 mm
Weight:  10,5 kg

Lenco L-75/S (1976) italiano

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