Drawmer 1961 Operator's Manual

Vacuum tube equaliser

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Summary of Contents for Drawmer 1961

  • Page 1: Table Of Contents

    1961 VACUUM TUBE EQUALISER OPERATORS MANUAL CONTENTS SAFETY CONSIDERATIONS page 1 POWER CONNECTION page 2 INSTALLATION page 2 FUSES page 3 INTRODUCTION page 4 APPLICATIONS page 5 CONTROL DESCRIPTIONS page 5 OPERATION page 7 IF A FAULT DEVELOPS page 10...
  • Page 2 COPYRIGHT This manual is copyrighted © 1995 by Drawmer Electronics, Ltd. With all rights reserved. Under copyright laws, this manual may not be duplicated in whole or in part without the written consent of Drawmer. ONE YEAR LIMITED WARRANTY Drawmer Electronics Ltd., warrants the Drawmer 1961 audio processor to...
  • Page 3: Safety Considerations

    1961 OPERATORS’ MANUAL DRAWMER 1961 VACUUM TUBE EQUALISER SAFETY CONSIDERATIONS CAUTION - MAINS FUSE TO REDUCE THE RISK OF FIRE REPLACE THE MAINS FUSE ONLY WITH A FUSE THAT CONFORMS TO IEC 127-2. 250 VOLT WORKING, TIME DELAY TYPE WITH A BODY SIZE OF 20mm x 5mm.
  • Page 4: Power Connection

    6: Reconnect to mains power source. INSTALLATION The 1961 is designed for standard 19" rack mounting and occupies 2U of rack space. Fibre or plastic washers may be used to prevent the front panel becoming marked by the mounting bolts. Because the tube circuitry generates more heat than an equivalent solid-state design, we recommend space be left above the unit to allow the heat to dissipate.
  • Page 5: Fuses

    This is a stereo jack socket wired such that the Ring carries the input to the 1961 and the Tip carries the output. W hen a plug is inserted, the XLR input for that channel is disconnected. The Audio Insert point may be connected directly to the side-chain access point of a Drawmer 1960 using a stereo jack cable wired with screened cable where the tip connects to the tip;...
  • Page 6: Introduction

    A simple linking facility is included which allows the 1961 to be used in conjunction with the Drawmer 1960 tube compressor/preamplifier where it may be used either in the side-chain ( for de-essing, de-popping and so forth ) or in the main signal path for conventional equalisation.
  • Page 7: Applications

    1961 OPERATORS’ MANUAL APPLICATIONS Further to its obvious applications as a general studio equaliser, the 1961 is also particularly effective as a post-production or mastering tool when used to treat complete stereo mixes, especially when used in conjunction with the 1960 tube compressor.
  • Page 8 1961 OPERATORS’ MANUAL Frequency selector switch. Available frequencies are: Frequency position position position position position position Switch 20Hz 32Hz 50Hz 80Hz 125Hz 200Hz Bass 100Hz 160Hz 250Hz 400Hz 650Hz 1kHz Low-Mid 500Hz 800Hz 1.2kHz 2kHz 3.2Khz 5kHz High-Mid 2.5kHz 4kHz...
  • Page 9: Operation

    The 1961 may also be linked directly to the Side-Chain access connector (or to the Audio Insert points) of a Drawmer 1960 tube compressor via the stereo Audio insert jacks on the 1961 rear panel. This requires only a standard (tip-wired-to-tip and ring-wired-to-ring) screened stereo jack lead.
  • Page 10 Note that a small amount of deliberately added tube distortion can produce the flattering effect associated with vintage tube equipment. The major feature when using the 1961 is that you can control the amount of enhancement using the Input level control, rather than having to accept what the...
  • Page 11 The High and Low-Pass filters are also useful in removing hum and noise from the sound. Driving the output stage of the 1961 so as to generate a little audible distortion can also help flatter most electric guitar sounds, especially those generated using a solid-state preamp.
  • Page 12: If A Fault Develops

    Drawmer Electronics Ltd., will be pleased to answer all application questions to enhance your usage of this equipment. Please address correspondence to: Drawmer (Technical Help line) : Coleman St.: Parkgate : Rotherham : S62 6EL : UK or, E-mail us on : tech@drawmer.com...
  • Page 13: Technical Specification

    1961 OPERATORS’ MANUAL TECHNICAL SPECIFICATIONS (All measurements taken at +4dBu operating level) INPUT IMPEDANCES 20KÙ INSERT 47KÙ MAXIMUM INPUT LEVEL +17dB (+21dBu) OUTPUT IMPEDANCES 50 Ù INSERT 200 Ù FREQUENCY RESPONSE <22Hz to 42KHz -1dB CROSSTALK <-80dB @ 10KHz <-75dB @ 20KHz...
  • Page 14: Block Diagram

    1961 OPERATORS’ MANUAL BLOCK DIAGRAM...

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