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Fairchild 670 User Manual

Fairchild 670
16 pages
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INSTRUCTION
MANUAL
MODEL
6
7
0
STEREO
LIMITER
Serial
No.
Fairchild
Recording
Equipment
Corporation
10-LO
5th
Avenue
Long
Island
City
1,
New
York
December
1959
(Supersedes
all
previous
issues)
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Fairchild 670 Specifications

General IconGeneral
Input Impedance600 Ohms
Output Impedance600 Ohms
Number of ChannelsStereo
Frequency Response20 Hz to 20 kHz
Attack Time0.2ms, 0.4ms, 0.8ms
Release Time0.3sec, 0.8sec, 2sec, 5sec, Auto 1, Auto 2
Compression RatioVariable, up to 20:1
WeightApproximately 65 lbs (29.5 kg)
Dimensions19"
Release Years1959
Tubes20

Summary

Outstanding Features

First Modern Limiter Design

Highlights the unit's departure from classical limiter design, emphasizing absence of thumps, distortion, and noise.

Independent Vertical and Lateral Amplitude Control

Details the capability to control vertical and lateral components independently for stereo disks.

Extremely Fast Attack Time

Describes the unit's rapid attack time, allowing it to capture short transients effectively.

Variable Release Time Characteristics

Outlines the adjustable release time options, including automatic functions based on program material.

General Description

Limiting in Stereo Disk Recording

Specifications - Controls and Physical

Control Functions Overview

Details the various controls: input gain, threshold, time constant, metering, and mode switches.

Input and Output Connections

Balance and Zero Adjustments

Threshold Adjustments

Remote Threshold Control Setup

Outlines the external method for controlling the threshold remotely using faders.

Normal Operation - Initial Setup

Initial Setup Procedure

Provides a step-by-step guide for initial installation and setting up the unit.

Normal Operation - Usage

Stereo Disk Limiting Strategy

Details the advantages of limiting vertical/lateral components for stereo disk mastering.