McIntosh MR78

Contattaci

TUNING RANGE: 88 to 108 MHz

ANTENNA INPUTS: 300 ohms balanced; 75 ohms unbalanced

INTERMEDIATE FREQUENCY (IF): 10.7 MHz

SENSITIVITY: 2.uV for 35 d B of quieting; 2.5.uV at 100% modulation (± 75 kHz deviation) for 3% total noise and harmonic distortion

SIGNAL TO NOISE RATIO: 75 dB below 100% modulation.

HARMONIC DISTORTION: 0.2% 20 Hz to 15,000 Hz, mono or stereo at 100% modulation. Typically, 0,05% at 1000 Hz

DRIFT: 25,000 Hz for the first two minutes; thereafter 5,000 Hz at 25°C in 24 hours

FREQUENCY RESPONSE:

- MONO ± 1 dB 20 Hz to 20,000 Hz with standard de-emphasis, (75uS)

- STEREO ± 1 dB 20 Hz to 15,000 Hz with standard
de-emphasis, (75.uS)

CAPTURE RATIO: 0.25 dB detector only; 2.5 dB complete tuner

SELECTIVITY: (IHF)

- SET SWITCH TO: NORMAL, NARROW, SUPER

- Adjacent Channel 7 dB 22 dB 55 dB

- Alternate Channel 55 dB >90 dB »90 dB

SPURIOUS REJECTION: 100 dB IHF
IMAGE REJECTION: 100 dB, 88 to 108 MHz. (IHF)
INTERMODULATION DISTORTION: 0.2% mono or stereo for any combination of frequencies from 20 Hz to 15,000 Hz with peak modulation equal to 100% or less. Typically 0.1%

MAXIMUM SIGNAL INPUT: 12 volts across 300 ohm antenna terminals will not increase harmonic or intermodulation distortio

AUDIO HUM: 75 dB down from 100% modulation

MUTING: 70 d B noise reduction between stations

MUTING THRESHOLD (Typical): Distant position 5uV; Local position
20uV

SCA FILTER: 50 dB down from 67 kHz to 74 kHz; 275 dB per octave slope

STEREO SEPARATION: 40 dB at 1,000 Hz

STEREO FILTER (Typical): 10 dB noise reduction In Position 1; 20 dB noise reduction in Position 2

AUDIO OUTPUT:

- Front panel controlled: 2.5 volts into 47,000 ohms

- Fixed output: 2.5 volts into 47,000 ohms; 1.0 volt into 600 ohms (All tuner performance limits were measured with
selectivity switch set at NORMAL, unless
otherwise stated)

POWER REQUIREMENT: 120 volts 50/60 Hz 35 watts

SEMICONDUCTOR COMPLEMENT: 3 JFET's, 2 MOSFET's, 17 Bipolar Transistors, 43 Diodes, 4 Integrated Circuits

SIZE:

- Front Panel: 16 inches wide (40.64 cm) by 5-7/16 inches high (13,81 cm);

- Chassis: 15 inches wide(38.1cm) by 13 inches deep (33.02 cm), including PANLOC shelf and back panel connectors;

- Knob clearance 1-1/2 inches (3.81 cm) in front of mounting
panel

WEIGHT: 27 pounds (12.25 kg) net, 39 pounds (17.69 kg) in shipping carton

FINISH

- Front panel: Anodized gold and black with special gold/teal panel nomenclature illumination;

- Chassis: Chrome and black

MOUNTING: Mclntosh developed professional PANLOC