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FRONT PANEL INFORMATION

TUNING DIAL SCALES

The MR 71 has two dial scales, the 88 to

108 scale marked in megacycles and the

0-100 logging scale. The dial scale marked

in megacycles indicates the positions of FM
stations in the 88 to 108 megacycle band.

The logging scale with linear divisions from

0-100 is located directly beneath the 88 to

108 scale. 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.

INDICATORS

The MR 71 has four indicators on the

dial panel: MULTIPATH indicator, SIGNAL
STRENGTH indicator, STEREO indicator, and

the TUNING indicator.

MULTIPATH INDICATOR

The MR 71 MULTIPATH indicator is an ex-

clusive Mclntosh development.

The MR 71 MULTIPATH indicator makes it

possible to improve FM reception with
precise FM antenna positioning.

Reduce noise due to multipath reception.
Reduce distortion due to multipath recep-

tion.

Improve stereo separation and the accu-

racy of your STEREO INDICATOR by reducing

multipath reception.

The MR 71 MULTIPATH INDICATOR shows

distortion from multipath signal reception.

Multipath reception causes the two beams on

the indicator to fluctuate rapidly. When the
antenna is rotated to the correct position,

the indicator beams will remain steady. The

directional antenna is picking up only the
desired signal and rejecting the reflected
multipath signals. In some locations, it is

possible that the best reception will occur on

a strong reflected signal rather than the
direct signal. When you tune to a different

station, the multipath indicator will tell you
if multipath is present. Multipath is inde-

pendent of signal strength.

STEREO INDICATOR

The stereo indicator will light when the dial

pointer crosses a station broadcasting multi-
plex stereo. The special circuit used will light

ONLY on the 19KC multiplex carrier. The

indicator will not light on noise pulses or
interference.

TUNING INDICATOR

An FM station is correctly tuned when the

indicator is in the black area of the tuning
indicator. The action of the TUNING indicator
is independent of station signal strength.

VOLUME

Controls volume level when the tuner is

connected to the pair of jacks marked

FRONT PANEL CONTROLLED.

6

Содержание MR 71

Страница 1: ...NFORMATION INSTALLATION CONNECTING Audio Outputs Stereophonic FM Multiplex Monophonic FM Remote Amplifiers Off The Air Recording Antenna Connections OPERATING INSTRUCTIONS Stereophonic FM Multiplex Mo...

Страница 2: ......

Страница 3: ...ich do not need zero setting adjustments 5 A new computer designed filter to re duce noise from stations broadcasting sub carrier auxiliary music services No other tuner uses such a filter The MR 71 a...

Страница 4: ...e cut off for listening to weak and noisy stations A back panel adjust control is fac tory set to the correct muting threshold level The mixer output is amplified through five intermediate frequency s...

Страница 5: ...al workmanship and components of extend to damage incurred during transpor this equipment to be free of defects for a tation to and from Mclntosh Laboratory Inc 3 YEAR FACTORY SERVICE CONTRACT An appl...

Страница 6: ...cator beams remain relatively steady showing that multipath distortion has been eliminated Two pairs of audio output jacks are on the back panel One pair of jacks is controlled only by the front panel...

Страница 7: ...ype Peak detecting self matrixing detector SCA Filter 50db down at 67KC to 74KC 275db per octave slope AutomaticMono StereoSwitch An exclusive Mclntosh development all electronic automatic mono stereo...

Страница 8: ...5 BLOCK DIAGRAM MR 71...

Страница 9: ...ducing multipath reception The MR 71 MULTIPATH INDICATOR shows distortion from multipath signal reception Multipath reception causes the two beams on the indicator to fluctuate rapidly When the antenn...

Страница 10: ...resumed the MR 71 will automatically switch to FM monophonic AUTO FREQ CONTROL The Automatic Frequency Control AFC circuit makes FM tuning easier It eliminates the possibility of tuner drift The AFC c...

Страница 11: ...ntennas to the MR 71 1A SLO BLO FUSE A 1 amp Slo Blo fuse protects the tuner circuits This fuse does not protect additional equipment connected to the back panel AC outlet AC OUTLET Provides 117 volt...

Страница 12: ...gnal appears at both the left and right channel AUDIO OUTPUTjacks REMOTE AMPLIFIERS The pair of audio output jacks not being used in an installation may be connected to external or remote amplifiers A...

Страница 13: ...10...

Страница 14: ...rear panel of the MR 71 OPERATING INSTRUCTIONS STEREOPHONIC FM MULTIPLEX 1 Turn the MODE SELECTOR to STEREO AUTO 2 Turn MUTING to IN 3 Turn the FM TUNING dial to the desired station The TUNING indica...

Страница 15: ...e dial panel lights by means of the PANEL LIGHT switch on the tuner back panel Set the switch to BRIGHT for maximum panel light Set the switch to DIM for less dial light and extended lamp life OUTPUT...

Страница 16: ...FM STATION LOG STATION DIAL FREQ LOG SCALE LOCATION CITY STATE ANTENNA DIRECTION REMARKS MONO STEREO TIME DATE...

Страница 17: ...FM STATION LOG STATION DIAL FREQ LOG SCALE LOCATION CITY STATE ANTENNA DIRECTION REMARKS MONO STEREO TIME DATE...

Страница 18: ...FM STATION LOG STATION DIAL FREQ LOG SCALE LOCATION CITY STATE ANTENNA DIRECTION REMARKS MONO STEREO TIME DATE...

Страница 19: ......

Страница 20: ...2 CHAMBERS STREET BINGHAMTON N Y Made in U S A Phone Area Code 607 723 5491 038 029 BE022003 Printed in U S A LABORATORY INC...

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