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Summary of Contents for McIntosh MR 78
- Page 1 THE McINTOSH MR 78 SOLID STATE FM/FM STEREO TUNER Reading Time 32 Minutes Price $1.25...
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Page 3: Table Of Contents
2 Chambers Street BACK PANEL INFORMATION 6 Binghamton, New York 13903 Phone: 607-723-3512 FRONT PANEL INFORMATION 6,7 LISTENING TO THE MR 78 TUNER 8 PERFORMANCE LIMITS 9 TYPICAL PERFORMANCE CHARTS 10,11 Take Advantage of 3 years TECHNICAL DESCRIPTION 12,13,14 of FREE Factory Service . . . -
Page 4: Installation
Thread the power cord through the opening on the cabinet panel. Carefully slide the instrument into area of the cabinet panel where the MR 78 is to be installed. Be sure that the edges of the template the opening so the rails on the bottom engage the... - Page 5 track on the mounting brackets. Slide the instru- ment in until it stops at the adjust position latches. Press the latches in and continue to slide the instru- ment until its front panel is flush with the cabinet panel. At the bottom front corners of the instrument are the PANLOC buttons.
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Page 6: How To Connect
An unbalanced 75 ohm antenna can be connected to outdoor FM antenna, (2) an all channel (UHF-VHF-FM) the MR 78. A "type F" connector is used to connect antenna, or (3) the indoor dipole supplied with the the 75 ohm coaxial cable to the back panel 75 MR 78. - Page 7 FM ANTENNA OPTIONAL ANTENNA LEAD-IN PREAMPLIFIER POWER AMPLIFIER RIGHT SPEAKER LEFT SPEAKER...
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Page 8: Back Panel Information
FIXED OUTPUT audio signals. The program at MODE SWITCH these jacks is not affected by the MR 78 front panel The MODE switch has three settings. VOLUME control. Use these output jacks to connect the tuner to a stereo control preamplifier or other STEREO ONLY - Only stations broadcasting the equipment which has its own volume control. - Page 9 to either LOCAL or DISTANT position for muting. SELECTIVITY switch to NORMAL connects a very low Weak stations that may not override noise and inter- distortion 8-pole Rimo filter in the IF circuit. Use the ference are also suppressed by the muting. In the NORMAL position of the SELECTIVITY switch for OUT position, the muting is turned off.
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Page 10: Listening To The Mr 78 Tuner
Listening to the MR 78 Tuner MR 78 will automatically switch to stereo. If a station is not transmitting the 19,000 Hz pilot for stereo, the STEREO indicator will remain off and the tuner will automatically switch to mono. MONOPHONIC FM PROGRAMS... -
Page 11: Performance Limits
Mclntosh instrument. We promise you that the or intermodulation distortion MR 78 you buy must be capable of performance at or exceeding these limits or you get your money back. AUDIO HUM: 70 dB down from 100% modulation Mclntosh is the only manufacturer that makes this guarantee. -
Page 14: Technical Description
104.3 MHz would not bother the signal at 96.3 MHz. When tuned to 104.3 MHz, the tuner will not overload. All MR 78 tuners must pass the 12 volt overload test. The MR 78 has an antenna matching circuit in the... - Page 15 Another new design in the MR 78 front end is the integrated circuit balanced mixer. This mixer is prac- tically impossible to overload. Oscillator pulling, crossmodulation, and other types of distortion so com- mon in ordinary transistor or FET mixers is minimized.
- Page 16 Ordinary stereo filters use a single capacitor. The The MR 78 has the narrowest IF bandwidth ever used in a stereo tuner. It is the correct width to let just one MR 78 uses an elaborate twin-T bandpass filter. This circuit is much more effective in suppressing noise FM station through.
- Page 20 McINTOSH LABORATORY INC. 2 CHAMBERS ST., BINGHAMTON, N. Y. 13903 607-723-3512 Design subject to change without notice. Printed in U.S.A. 038-580...
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