Revox B790 Turntable"

Revox Turntable: Revox B790


Revox B790 Turntable"
 Revox B790 Turntable a crystal-controlled direct power unit with tangential short clay/tone arm, was introduced together with the rear-Fi-plant B77/B750/B760. All people were not inspired by the Design of the tiltable "cigar box", but capability characteristics of the new creation let aufhorchen. Here simply an existing conception was not improved, but in principle new solutions for old problems were found.
The Revox B790 "LINATRACK" Tonarm was 4 cm long and weighed inclusive pick-up cell only 40 g. the clay/tone arm was opto-electronically steered, by means of servo-drive tangential still-led, exactly the same as a record also cut. Putting on was a children's game: Plate present, box pivot, key press. The Revox B790 clay/tone arm did not need an antiskating device, because from the tangential guidance no Skatingkraefte resulted and concomitantly no rattling/clinking distortions and no cross modulation (caused due to trace angle errors) arose.
The plattenteller did not exhibit a stroboscope as a check of the number of revolutions. Revox B790 Turntable" Because a stroboscope uses anyway only the frequency as reference, it could do without it. The drive of the Revox B790 was more exact. The brushless, hallkommutierte and directly propelling DC engine was phaserigidly bound to a quartz reference via Tachogeber and PLL servo control. Nevertheless there was a speed regulation of 7 %, and even the variable numbers of revolutions were crystal accurate measured and indicated by illuminated figures.
The Revox B790 united security and simplicity in the operation with best rendition quality, its concept was protected with three patents. By the Revox B790 altogether 45000 units were sold.
Technical data
Numbers of revolutions 33,33 and 45 U/min, crystal accurate
Number of revolutions accuracy 0,01 %
Revox B790 Number of revolutions fine adjustment 7%
Pitch fluctuations, evaluates better than 0.05 %
Rumpel weighted signal-to-noise ratio better than 68 railways
Tangential trace loss angle smaller than 0.5 degrees
Revox B790 Tracking force, adjustable of 8... 20 mN (0.8... 2 p)
Assembly 29 ICs, 30 transistors, 24 diodes, 1 LED, 4 seven segment displays 3 bridge rectifier
Revox B790 Weight 11 kg

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