User manual MCINTOSH MX113

[. . . ] THE MclNTOSH MX113 FM/FM STEREO-AM TUNER-PREAMPLIFIER Reading Time: 45 Minutes Price $1. 25 Your MX 113 AM-FM/FM stereo tuner and stereo preamplifier will give you many years of pleasant and satisfactory performance. If you have any questions please contact-- CONTENTS Service Contract Installation How to Connect What the Controls Do And How to Use Them Using the Pushbuttons Balancing Your Stereo Listening to Your Stereo Performance Limits and Ratings Performance Charts Technical Description Block Diagrams Station Log 1 2, 3 4, 5 6, 7 7 8 9 10, 11 12, 13, 14 15, 16, 17 18, 19 20 CUSTOMER SERVICE Mclntosh Laboratory Inc. 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. [. . . ] When the TAPE pushbutton is at the OUT position the program being recorded is heard. Separation of a weak station from a strong adjacent station can be improved with the SELECT button at the IN position. Separation of a weak station from a strong adjacent station can be improved with the SELECT button at the IN position. When the STEREO indicator is lighted, the station is broadcasting a 19, 000 Hz pilot signal for stereo and the MX 113 will automatically switch to stereo. If a station is not transmitting the 19, 000 Hz pilot signal for stereo, the STEREO indicator will remain off and the tuner will automatically switch to mono. The MX 113 uses a new Mclntosh developed automatic mono-stereo switching circuit. The circuit action is electronic and prevents switching clicks or transients. The ultrasonic muting circiut suppresses all noise between FM stations. It also suppresses all weaker stations not strong enough to override the background noise. The muting threshold setting determines the strength of the signal which can be heard with muting in operation. While tuning FM you may notice that the tuning meter will show a station yet no program is heard from the speakers. The muting circuit in the tuner has rejected the station because there is objectionable noise with the weak signal from the station. Push the MUTING pushbutton to the OUT position and the station will be heard. Most programs that can be tuned in this manner are of poor quality due to interfering noise. The ability to separate a weak station from a strong station will be improved by the use of the SELECT pushbutton. With the pushbutton at the IN position a Mclntosh developed circuit compresses the sides of the IF curve which improves the separation of weak stations from strong stations on adjacent channels. 9 Performance Limits and Ratings Performance limits are the maximum deviation from perfection permitted for a Mclntosh instrument. We promise you that the MX 113 you buy must be capable of performance at or exceeding these limits or you get your money back. Mclntosh is the only manufacturer that makes this guarantee. FM USEABLE SENSITIVITY 2. 5 microvolts at 100% modulation (±75 kHz deviation) for less than 3% total noise and harmonic distortion SIGNAL TO NOISE RATIO 70 dB at 100% modulation HARMONIC DISTORTION Mono: 0. 3% at 100% modulation ±75 kHz deviation Stereo: 0. 5% at 100% modulation ±75 kHz deviation FREQUENCY RESPONSE ±1dB from 20 Hz to 15, 000 Hz with standard de-emphasis CAPTURE RATIO 1. 5 dB SPURIOUS REJECTION 90 dB IHF IMAGE REJECTION 95 dB; 88 to 108 MHz (IHF) STEREO SEPARATION 35 dB at 1000 Hz SELECTIVITY Adjacent Channel--6 dB normal; 15 dB IHF with position Alternate Channel--58 dB normal; 88 dB IHF with position IHF with SELECT button in SELECT button at the IN IHF with SELECT button in SELECT button at the IN ADJACENT CHANNEL SELECTIVITY 35 dB with SELECT button at the OUT position 45 dB with SELECT button at the IN position IMAGE REJECTION 65 dB; 540 kHz to 1600 kHz PREAMPLIFIER FREQUENCY RESPONSE ±0. 5 dB, 20 to 20, 000 Hz DISTORTION 0. 1% at 2. 5 volts output, 20 to 20, 000 Hz INPUT SENSITIVITY PHONO 1 and PHONO 2: 2 millivolts for 2. 5 volts output at 1, 000 Hz AUX and TAPE: 0. 25 volts for 2. 5 volts output INPUT IMPEDANCE PHONO 1 and PHONO 2: 47, 000 ohms AUX and TAPE: 250, 000 ohms VOLTAGE AMPLIFICATION PHONO 1, PHONO 2 to MAIN output 62 dB, to TAPE output 42 dB AUX andTAPEtoMAINoutput20dB;to TAPE output 0dB HUM AND NOISE PHONO 1 and PHONO 2: 72 dB below 10 millivolt input; equivalent to less than 3 microvolts at the input terminals. AUX and TAPE; 85 dB below 2. 5 volts output, unweighted BASS CONTROL -18 dB to +16 dB at 20 Hz TREBLE CONTROL ±20 dB at 20, 000 Hz LF FILTER Flat or roll off below 50 Hz, down 12 dB at 20 Hz HF FILTER Flat or roll off above 5, 000Hz, down 12 dB at 20, 000 Hz OUTPUT Main: 2. 5 volts with rated input. Phono input signal of TUNING INDICATOR D'Arsonval movement meter STEREO INDICATOR Stereo light activated by 19, 000 Hz pilot signal only AM SENSITIVITY 75 microvolts at 1, 000 kHz (using external antenna input) SIGNAL TO NOISE RATIO 45 dB HARMONIC DISTORTION 1% at 30% modulation FREQUENCY RESPONSE Down 6 dB at 3, 500 Hz 10 10 millivolts produces 1. 2 volts output. FM and will produce 1. 2 volts output at 100% modulation. L + R: 2 volts with rated input WEIGHT: 26 pounds (11. 79 kg) net, 38 pounds (17. 24 kg) in shipping carton. FINISH: Front panel: Anodized gold and black with special gold/teal panel nomenclature illumination. CHASSIS: Chrome and black. GENERAL TRANSISTOR COMPLEMENT 2-JFET 3--MOSFET 30--Silicon Planar 31--Diodes MOUNTING: Mclntosh developed professional PANLOC. 2 Integrated Circuits--(each contains the equivalent of 16 transistors and 8 diodes) POWER REQUIREMENTS 120 volts, 50/60 Hz, 30 watts FACILITIES AND FEATURES VOLUME CONTROL: Precision "tracked" at all listening levels. [. . . ] For example, at 1, 000 Hz, the phono input can accept 150 millivolts of signal without overload. Ten millivolts of signal at the phono input at 1, 000 Hz will produce 1. 2 volts at the tape output. The selector switch connects either the output of the phono amplifier, the FM tuner section, the AM tuner section or one of two high level inputs (TAPE or AUX) to the main preamplifier. A loudness circuit is connected to a tap on the volume control to provide loudness compensation. [. . . ]