Do you have a question about the McIntosh MR 78 and is the answer not in the manual?
Contact information for McIntosh customer service for operational questions.
Details on the 90-day guarantee and the Three Year Factory Service Contract.
Recommendations for adequate ventilation and required physical space for the tuner.
Using the template to mark and prepare the cabinet panel for installation.
Instructions for drilling mounting holes and sawing the main cutout.
Attaching mounting strips and Panloc shelf brackets to the cabinet.
Sliding the tuner into the cabinet and securing it with Panloc buttons.
Details on using FIXED and FRONT PANEL CONTROLLED audio output jacks.
Connecting outdoor, indoor dipole, or 75 ohm antennas to the tuner.
Information on test points, the 120V AC outlet, and the protective fuse.
Description of antenna connection strip and audio output jacks.
Function of the volume knob for level adjustment and power on/off.
Using the tuning dial, signal strength, and tuning meters for station selection.
Understanding the stereo indicator and the MODE switch settings.
How the muting switch suppresses interstation noise.
Using the FILTER and SELECTIVITY switches for optimal reception.
Interpreting the meter for signal strength or multipath interference.
Dial scale intensity and antenna match selector switches.
Recommended settings for optimal monophonic FM reception.
Settings for automatic stereo/mono switching and stereo-only mode.
How to use NORMAL, NARROW, and SUPER NARROW selectivity settings.
McIntosh performance guarantee, tuning range, antenna inputs, IF, sensitivity.
Harmonic distortion, drift, frequency response, and capture ratio.
IHF selectivity, spurious rejection, image rejection, intermodulation distortion.
Max signal input, audio hum, muting, SCA filter, stereo separation, audio output.
Power requirements, semiconductors, physical size, weight, finish, and mounting.
Charts showing IF selectivity and time delay for different settings.
Graph illustrating harmonic distortion versus frequency at normal selectivity.
Graph showing intermodulation distortion versus frequency at normal selectivity.
Charts for stereo separation limits and signal performance.
Description of the smooth flywheel tuning mechanism and illuminated dial pointer.
Details on the cascode circuit RF amplifier, overload rejection, and antenna matching.
Explanation of the linear-phase Rimo filter for minimal FM distortion.
Description of filter characteristics for NORMAL, NARROW, and SUPER NARROW settings.
Description of the new FM detector for distortionless demodulation.
Details on the integrated circuit audio amplifier and stereo filter.
Function of the two-transistor amplifiers for audio output.
Explanation of the regulated 24-volt and half-wave rectifier power supplies.
Diagram illustrating the radio frequency and intermediate frequency signal paths.
Diagram showing the signal flow through the multiplex and audio stages.