User manual MCINTOSH MR77

[. . . ] THE MclNTOSH MR 77 SOLID STATE FM/FM STEREO TUNER Reading Time: 24 Minutes Price $1. 25 Your MR 77 FM/FM Stereo Tuner will give you many years of pleasant and satisfactory performance. If you have any questions, please contact: CONTENTS SERVICE CONTRACT . 2 Chambers Street Binghamton, New York 13903 Phone: 607-723-3512 WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. Take Advantage of 3 years of FREE Service . . . Fill in the Application NOW. THREE YEAR SERVICE CONTRACT An application for a FREE THREE YEAR SERVICE CONTRACT is included with this manual. [. . . ] ANTENNA CONNECTION STRIP Provides easy push type connectors for 300 ohm FM antenna and a ground connection. FM ANTENNA--75 OHM Provides a "type F" connector for a 75 ohm unbalanced FM antenna. AUDIO OUTPUTS The left-hand pair of AUDIO OUTPUT jacks provides FIXED OUTPUT audio signals. The program at these jacks is unaffected by the MR 77 front panel VOLUME control. AC OUTLET Provides 117 volt AC power up to 350 watts for additional equipment such as amplifiers, etc. It turns on and off with the front panel AC power switch on the VOLUME control. AC POWER CORD Connect the AC power cord to a 117 volt, 50 to 60 Hz power line receptacle. This fuse 5 to a stereo control preamplifier which has its own master volume control. The right hand pair of AUDIO OUTPUT jacks, provides FRONT PANEL CONTROLLED audio signal. The program at these jacks is controlled by the MR 77 front panel VOLUME control. Use these output jacks to connect to external power amplifier, tape recorders, or any equipment which requires continuous front panel control of tuner output volume. Front Panel Information TUNING DIAL The MR 77 has two dial scales: 1. Logging scale--Marked 0 to 100 The logging scale can be used to accurately retune any station. You may find it easier to keep a record of your favorite stations by use of the logging scale. A small portion of dial pointer has been illuminated to increase the ease of tuning. They are: STEREO indicator, MULTIPATH indicator, SIGNAL STRENGTH meter, and the TUNING meter. MULTIPATH INDICATOR The MULTIPATH indicator is an exclusive Mclntosh development. The proper use of the MULTIPATH indicator makes it possible to improve FM reception with precise FM antenna positioning. When rotating the antenna, ob- servation of the multipath indicator will show best orientation for the FM station being received. Multipath distortion causes the two beams on the indicator to fluctuate rapidly. When the antenna is rotated to the best position, the indicator beams tend to remain steady. The directional antenna is then picking up only the desired signal and rejecting the reflected multipath signals. In some locations it is possible for the best reception to occur when picking up a strong reflected signal rather than the direct signal. [. . . ] Highly stable pilot recovery circuits are used to minimize 19 kHz intermodulation beats. Muting, stereo only, and automatic stereo/mono switching are functions also performed within the stereo decoder. AUDIO PREAMPLIFIER SECTION The audio amplifier increases the level of the program adequate to drive a preamplifier or other accessory equipment. It consists of two, three transistor amplifiers, one for each channel. [. . . ]