Tube-tech CL 2A Dual Opto Compressor User Manual download pdf

LYDKRAFT ApS

Mose Allé 20, DK 2610 Rødovre

Denmark



TUBE-TECH CL 2A

dual compressor

DESCRIPTION.

The TUBE-TECH compressor CL 2A is a dual opto compressor with a gai n reduction

element, which have no long-term degradation and almost infinite life. Th is element are

placed afte r the inp ut-tran sformers of the compressors and follo wed by an all t ube-based

amplifier with a gain of -



dB to +10 dB.

Thus the signal is not fed through any semiconductor circuitry on its way to t he output.

The amplifier is based on two tubes (dual triodes) in push-pul l co nfiguration (one ECC 83 as

adifferentialamplifier,andoneECC82astheoutputstage), and an output transformer.

The power supply for the differe ntial amplifie rs i s stabilised and the heaters of all four tubes

are f ed with a stabilised DC voltage.

The two amplifiers (including input and output transfo rmer) and the p ower supplies are

placed on one PC-board.

Both input and output are bal anced and fully float ing.

The compressors are switched i n and out via two relays (click less).

THE SIDECHAIN:

The two side cha ins are the only part of the compressor that contains semiconductors.

It contains two J-FET quad op-amps, one npn-transistor and one FET-transistor, which

handles the signal for the gain-reduction element.

The compressor contains two time constants circuits:

1. Fixed a ttack and release times

2. Vari able attack and release times

COMPRESSOR INTERCONNECTION:

The side chain sockets fo r interconnection of several compressors are locate d on the rear

panel.

A swi tch on the front selects which compressors are interconnected, and on which bus the y

are connected. If you e.g. have 10 compressors in a rack, you can select compressor 1,5,7

and 8 on link 1, and compressor 2,3,6 and 9 on link 2, leaving compressor 4 and 6 in the off

position.

Compressor 1,5,7,8 is now interconnected and all four will perform the exact same

compression. This applies to compressor 2,3 ,6 and 9 as well. Compressor 4 and 6 are

independent.

(150203)

1 2 3 4 5 6 7

Summary of Contents

Page 1 - TUBE-TECH CL 2A

LYDKRAFT ApSMose Allé 20, DK 2610 RødovreDenmark1TUBE-TECH CL 2Adual compressorDESCRIPTION.The TUBE-TECH compressor CL 2A is a dual opto

Page 2 - CONTROLS:

LYDKRAFT ApSMose Allé 20, DK 2610 RødovreDenmark2The interconnection implies, that the unit that performs the most compression is controllingthe other

Page 3 - (981214)

LYDKRAFT ApSMose Allé 20, DK 2610 RødovreDenmark3NB:Leave the meter swit ch i n positioncompressionas it mightintroduce distortion if left i noutputpo

Page 4

LYDKRAFT ApSMose Allé 20, DK 2610 RødovreDenmark4SUGGESTED APPLICATIONSOFTUBE-TECH COMPRESSOR CL 2AIn the following, you will find suggestions on vari

Page 5 - P1/P101 located

LYDKRAFT ApSMose Allé 20, DK 2610 RødovreDenmark5ADJUSTMENT PROCEDURE:CAUTION:Before making any adjustment let the unit heat-up at least 15 min.Observ

Page 6

LYDKRAFT ApSMose Allé 20, DK 2610 RødovreDenmark6ADJUSTMENT OF THE VU METER READING "COMPRESSION":1) Turn theTHRESHOLD-control fully cou nte

Page 7

LYDKRAFT ApSMose Allé 20, DK 2610 RødovreDenmark7TECHNICAL SPECIFICATIONS CL 2A:Input impedance: 5KOhmsOutput impedance: <60OhmsFrequency-r esponse

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Tube-tech CL 2A Dual Opto Compressor User Manual

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Summary of Contents

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