Reading Time: 32 Minutes
Price $2.00
THE MR 75 AM/FM TUNER
Page 1: ...Reading Time 32 Minutes Price 2 00 THE MR 75 AM FM TUNER...
Page 2: ...the rear panel of the chassis Record that serial number here Serial Number The model serial number and purchase date are important to you for any future service Record the purchase date here Purchase...
Page 3: ...ACT the SERVICE CONTRACT CER TIFICATE must be presented when the instrument is taken to the service agency 3 Always have service done by a Mclntosh authorized service agency If the instrument is modif...
Page 4: ...ctions 1 Open the carton and remove the PANLOC brack ets hardware package and mounting template Re move the MR 75 from its plastic bag and place it up side down on the shipping pallet then unscrew the...
Page 5: ...length in the A holes on each side attach the PANLOC brackets to the cabi net panel the short flange is mounted against the front face of the cabinet panel The screws pass through the PANLOC bracket f...
Page 6: ...e ANTENNA 300ft FM push connectors The flexible folded dipole antenna 300 ohm sup plied with the MR 75 is for use in urban or high strength signal areas Connect the two leads from the dipole to the AN...
Page 7: ...LTERNATE AM ANTENNA TO EXTERNAL GROUND FM ANTENNA OPTIONAL 75 ANTENNA LEAD IN TO AC POWER SOURCE MAXIMUM PERFORMANCE INDICATOR OR OSCILLOSCOPE LEFT SPEAKER PREAMPLIFIER RIGHT SPEAKER 5 POWER AMPLIFIER...
Page 8: ...C outlet Front Panel Information and Use of Controls The MR 75 Tuner has a flexible control system Pro per use of these controls will yield a high level of per formance INPUT SELECTOR The two position...
Page 9: ...Knob can be tuned mechanically slightly away from the frequency of the FM station without detuning the MR 75 This makes tuning the MR 75 very easy but can cause the MR 75 to not return to the FM stati...
Page 10: ...ion 60 dB minimum AM SECTION Sensitivity 75 V IHF with external antenna Signal To Noise Ratio 45 dB minimum IHF or 55 dB at 100 modulation Frequency Response 0 6 dB from 20 Hz to 3500 Hz Harmonic Dist...
Page 11: ...1k 10k SIGNAL INPUT IN MICROVOLTS F M HARMONIC DISTORTION 100 MODULATION 0 5 0 4 0 3 0 2 0 1 0 20 100 1k 10k 20k FREQUENCY IN HERTZ HARMONIC DISTORTION IN PERCENT RESPONSE AND SEPARATION IN dB 10 0 1...
Page 12: ...MINIMUM USABLE SENSITIVITY IHF AM SELECTIVITY AT 1000 kHz 970 980 990 1000 1010 1020 1030 10 FREQUENCY IN HERTZ FREQUENCY IN kHz 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 0 120 100 8...
Page 13: ...LTIPLEX The heart of the multiplex section is a new third generation phase locked loop PLL stereo decoder in tegrated circuit IC This PLL IC incorporates two special systems an automatic variable sepa...
Page 14: ...ain a high degree of selectivity yet allowing good audio fidelity A 10 kHz active filter eliminates the whistle and irritating monkey chatter caused by an adjacent station The automatic volume control...
Page 15: ...McINTOSH MR 75 AM FM TUNER Block Diagram 13...
Page 16: ...C 2 CHAMBERS ST BINGHAMTON N Y 13903 607 723 3512 The continuous improvement of its products is the policy of Mclntosh Laboratory Incorporated who reserve the right to improve design without notice Pr...
