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Mission 776 User Manual

Mission 776
20 pages
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MISSION OWNER'S MANUAL
MISSION 776/777 UNPACKING-INSTALLATION
MODEL 776
The following items are included with the pre-amplifier.
- Warranty card
- Owners manual
- Pre-amplifier line cord
- Banana plug
- 1 spare line fuse
MODEL 777
The following items are included with the power amplifier.
- Warranty card
- Owners manual .
- Power amplifier line cord
- 1 spare line fuse, 2 spare output fuses
If any of the above items are not included contact your dealer or the factory.
IMPORTANT: REFER TO OPERATING INSTRUCTIONS PRIOR TO USING SYSTEM.
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Mission 776 Specifications

General IconGeneral
BrandMission
Model776
CategoryAmplifier
LanguageEnglish

Summary

Mission 776/777 Unpacking and Installation

Model 776 Included Items

Lists items included with the Mission 776 pre-amplifier.

Model 777 Included Items

Lists items included with the Mission 777 power amplifier.

Mission 776 Front Panel Controls

ON/OFF Switch Operation

Explains the operation of the ON/OFF switches and LED indicators.

Input Selector Switch

Describes the input selector switch and how to identify selected input.

Volume Control Adjustment

Details the volume control, its range, and step-wise gain adjustment.

Tape Monitor Function

Explains how to select tape monitor mode using the push button.

Mono/Stereo Selection

Details the mono/stereo switch and how to select mono operation.

Mission 776 Back Panel Connections

AC Connector Housing and Fuse

Covers the AC input connector, fuse access, and voltage selection.

Grounding Terminal

Describes the grounding connection for turntables and its importance.

Phono Input

Specifies the phono input for moving magnet or high output moving coil cartridges.

Auxiliary and Tape Inputs

Details auxiliary and tape inputs for connecting external audio sources.

Balance Control Feature

Notes the balance control's potential detriment and its status in newer models.

Tape Output and Pre-Amplifier Output

Covers tape output for recording and pre-amp output for power amplifier connection.

Mission 777 Front Panel Operation

Green LED Indicator

Explains the illumination of the green LED when the amplifier is turned on.

ON/OFF Switch

Notes the self-explanatory nature of the ON/OFF switch.

Mission 777 Back Panel Connections

AC Connector Housing and Fuse

Covers the AC input connector, fuse access, and voltage selection for the 777.

Input Connection

Specifies the connection point for the pre-amplifier output.

Speaker Outputs

Details the five-way binding posts for various speaker cable connections.

Output Fuse Protection

Explains the role of output fuses in protecting speakers and the amplifier.

Soft Clip Feature Status

Informs that the soft clip switch has been disabled due to redundancy.

Precautionary Measures

Equipment Handling and Power

Guidelines for safely disconnecting equipment and managing volume during operation.

Amplifier Placement and Ventilation

Instructions on amplifier placement to ensure adequate airflow and prevent overheating.

Fuse Replacement Guidelines

Details on maintaining proper fuse ratings when replacing fuses.

Electrical Connections and Cabling

Guidance on grounding outlets and selecting appropriate speaker/interconnect cables.

Troubleshooting Guide

No Sound or Low Volume Issues

Solutions for no sound or low volume from one or both speakers.

Hum, Crackling, or RFI

Troubleshooting steps for hum, crackling, or radio frequency interference.

Audio Quality Issues

Solutions for audio quality problems like hollow sound or poor instrument definition.

Introduction to Mission Amplifiers

Congratulations and Important Notes

Congratulates the user and offers essential notes before operation.

Amplifier Design Principles

Explains the core design philosophy and technical considerations for the amplifiers.

Mission Amplifier Design Philosophy

General Design Approach

Outlines Mission's philosophy of straight-line design, avoiding unnecessary features.

Power Supply Importance

Emphasizes the critical role of the power supply as an integral part of the audio chain.

Amplifier Section Quality

Discusses amplifier section quality, focusing on dynamic distortions and load handling.

Technical Evaluation and Construction

Key Measurement Parameters

Explains crucial parameters for amplifier evaluation and performance.

Amplifier Construction Details (Mechanical)

Details the mechanical construction of the amplifier case and internal access.

Amplifier Construction Details (General)

Covers modular design, minimal connectors, and track layout for optimal performance.

Mission 776 Pre-Amplifier Components and Power

Component Selection and Quality

Explains the selection and quality of active components, capacitors, and resistors used.

Power Supply Configuration

Details the battery-derived power supply, filtering, and impedance characteristics.

Phono Stage Design

Explains the phono stage design, RIAA equalization, and feedback approach.

Mission 776 Pre-Amplifier Features

Line Stage Design

Explains the design of the line stage and its output impedance.

Pre-Amplifier Modules and Facilities

Details pre-amplifier module gain, controls, and volume potentiometer.

Mission 777 Power Amplifier Construction

Mechanical Construction

Details the mechanical construction of the 777 amplifier, including its case and heat sink.

General Design and Modularity

Covers the modular design and minimal connectors for ease of servicing.

Component Selection

Explains the selection of discrete components, resistors, and power supply capacitors.

Mission 777 Power Amplifier Design

Power Supply Circuitry

Explains the power supply design, transformer, filtering, and impedance characteristics.

Power Amplifier Operation

Details the Class A/AB operation, DC coupling, and low feedback implementation.

Protection and Stability

Covers output fuse protection and the amplifier's inherent stability without Zobel networks.