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Mission 777 Owner's Manual

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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.
MISSION OWNER'S MANUAL
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  • Page 1 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.
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  • Page 3 MISSION 776 OPERATING INSTRUCTIONS (Bracketed numbers refer to panel drawings) FRONT PANEL 1. ON/OFF SWITCH (5) & (9) There are two push button switches situated on the right hand side of the front panel, the switch on the extreme right is designated "S1" (9) & beside it is "S2" (5).

  • Page 4: Important Notice

    1. A.C. CONNECTOR HOUSING (10) & (11) The detachable line cord connects to the 776 at A.C. input (10). Access to the line fuse (11) is possible only when the line cord has been disconnected & the clear plastic window is moved aside. The fuse housing (11) also contains a small universal voltage card that selects the correct line voltage for the country in which the amplifier is used.
  • Page 5 SPECIFICATIONS MISSION 776 PRE-AMPLIFIER Phono: 2mV. for 1 Volt rms output Input Sensitivity: Line: 100mV for 1 Volt rms output Input Overload at 1 kHz: Phono stage 150m.v. Nominal 1 Volt rms Output Level: Maximum 11 Volts peak Input Impedance: 47kΩ, 150pF.
  • Page 6 MISSION 777 OPERATING INSTRUCTIONS (Bracketed numbers refer to panel drawings) FRONT PANEL 1. GREEN L.E.D. (1) This light illuminates when the amplifier is turned on. 2. ON/OFF SWITCH (1) Self explanatory. BACK PANEL 1. A.C. CONNECTOR HOUSING (2) & (3) The detachable line cord connects to the 777 at A.C.
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  • Page 8: Precautionary Measures

    USING 4Ω SPEAKERS: 5 ampere, fast blow 5. For best possible signal to noise figures Model 776 & 777 amplifiers must be connected to a properly grounded outlet. Do not remove the third wire grounding pin on power cord plug.

  • Page 9: In Case Of Trouble

    B) insure that all cable connections are correct & secure to No sound from one or both speakers (2), (5), (6), of 777 & (12), (13), (15), (16), (17) of 776. C) insure that 776 batteries are fully charged. Refer to operating instructions.

  • Page 10: Important Notes

    & phase errors resulting in incoherent musical information. The Mission designs are the result of a new look at the fundamental parameters & basic operating functions of an audio amplifier. Our research has been painstaking in careful evaluation & correlation of subjective results with advanced &...

  • Page 11: Design Philosophy

    - more suitably rated in kilowatts. The revolutionary battery powered 776 straight line pre-amplifier is strictly for the purist, paying particular attention to the all important role of power supply rejections. A true RIAA equalisation curve is followed to within 0.2dB accuracy (as against arbitrary roll-offs) to ensure phase accuracy at low frequencies.
  • Page 12 Generally, it should not be necessary to remove the chassis in order to replace any major components. b. General The 776 has been designed to be modular in construction, while keeping the number of connectors & contacts in the signal path to an absolute minimum. Switches & connectors used are of the best quality with gold plated contacts.
  • Page 13 Components 1. All active components used in the amplifier section of the 776 are of the low noise discrete type, with high gain x bandwidth figures. This is because no integrated circuit (operational amplifier) has yet been made available with a wide enough open loop bandwidth for true high fidelity reproduction.
  • Page 14 b. Line Stage This is a simple CE stage followed by a current pumping voltage amplifier. The overall feedback of this stage is <20dB with an output impedance of 200Ω. c. The Pre-Amplifier modules These have a gain of 54 dB which is suitable for all moving magnet & high output moving coil cartridges.
  • Page 15 2, Power Supply: Each of the two mono power supplies comprises a specially designed, extremely low regulation transformer (200 Volt-amperes at.3.5% regulation), feeding directly into the power supply module with extra heavy duty copper tracks &, typically, 35,000 microfarads of filtering capacity, decoupled by highest quality polyester capacitors for high frequency performance.
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