User manual MCINTOSH MCMR65B

[. . . ] We also guarantee the mechanical and electrical workmanship and components to be free of defects for a period of 90 days from date of purchase. If such defects occur, Mclntosh Laboratory or one of its authorized agencies will repair the defect at no cost to the purchaser. This guarantee does not extend to components damaged by improper use nor does it extend to transportation to and from the factory or service agency. THREE YEAR FACTORY SERVICE CONTRACT An application for a FREE THREE YEAR FACTORY SERVICE CONTRACT is included with this manual. Mclntosh will provide all parts, materials and labor needed to return the measured performance of the instrument to the original performance limits free of any charge. [. . . ] Turning the volume control fully counterclockwise turns the AC power off. TUNING DIAL AND METER The MCMR65B 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 the dial pointer has been illuminated to increase the ease of tuning. An FM station is tuned correctly when the TUNING meter pointer is in the black area of the meter scale. The tuning indication is independent of the station signal strength. Maximum left and right pointer swing, which occurs as you tune through a station, is dependent on the setting of the SELECTIVITY switch. STEREO FUNCTION INDICATOR The STEREO FUNCTION indicator lights red when the dial pointer is tuned to or crosses a station broadcasting the 19, 000 Hz pilot signal for stereo. The special circuit used will light only when the 19, 000 Hz multiplex pilot is present. The indicator will not light on noise pulses or interference. It does not light when the FILTER switch is set to OUT. SIGNAL STRENGTH/MULTIPATH SWITCH AND METER The SIGNAL STRENGTH/MULTIPATH meter can be switched to indicate either relative signal strength or relative amount of multipath interference. With METER switch set to SIGNAL STRENGTH, greater pointer deflection indicates a stronger signal. With the METER switch set to MULTIPATH, there is little or no multipath interference when the meter indication remains steady and at the left end of the scale. The station is properly tuned when the TUNING meter pointer comes to rest anywhere over the black area on the meter scale. While tuning across the dial you may notice movement of the tuning meter pointer without hearing a station. This is caused by a station so weak or distant that it does not over-ride the background noise. Extremely weak stations may be heard by setting the MUTING switch to OUT. Rotate the directional antenna for best reception as indicated by a maximum pointer deflection on the SIGNAL STRENGTH meter and a minimum pointer deflection on the MULTIPATH meter. Then adjust the VOLUME control to the desired listening level. STEREO FM PROGRAMS If you wish the tuner to automatically switch between stereo and mono broadcasts, set the: MODE switch to STEREO AUTO MUTING switch to DISTANT SELECTIVITY switch to NORMAL In this mode of operation, setting the FILTER switch to position 1 or 2 will reduce noise on weak stereo stations. [. . . ] The excellent selectivity of the MCMR65B {210 kHz wide at 60dB down) permits tuning stations that are impossible to receive on ordinary tuners. LINEAR-PHASE BRIDGE DISCRIMINATOR The advantages of the Rimo filter would be lost if it had to work into an ordinary FM detector. It is the linear phase bridge discriminator. The linear-phase bridge discriminator uses a balanced transmission line bridge in conjunction with a differential voltage-doubling rectifier to acheive nearly distortionless demodulation of FM signals. [. . . ]