How To Connect - McIntosh MR 77 Owner's Manual

How to Connect

AUDIO OUTPUTS
Use the FIXED OUTPUT jacks to connect to a con-
ventional control preamplifier which has its own volume
control. The VOLUME CONTROL does not affect the
output of the tuner at the FIXED OUTPUT jacks.
The output impedance at the FIXED OUTPUTS is
600 ohms. Longer cables than are normally supplied
can be used to interconnect the MR 77 with other equip-
ment. The length of the cable is limited by the capacity
of the cable. The total capacity must not exceed 1600
pF. For instance: cables with a capacity of 32 pF per
foot may be 50 feet long; 16 pF per foot cable may be
100 feet long.
Use the FRONT PANEL CONTROLLED jacks to con-
nect to a conventional control preamplifier when use of
the tuner volume control is desired. These jacks may
be used to connect to external equipment such as power
amplifiers or tape recorders where control of volume at
the tuner is necessary. The load impedance connected
to the front panel controlled packs should not be less
than 47,000 ohms. There is no difference in the signal
quality or maximum output levels available at each pair
of output jacks.
CONNECTING AN FM ANTENNA
One of three antenna systems can be used: (1) an
outdoor FM antenna, (2) a VHF-TV antenna, or (3) the
indoor dipole supplied with the MR 77.
An outdoor antenna is recommended for optimum
performance in all areas. In fringe (outlying) areas, best
results will be obtained with a highly directional FM
antenna used in conjunction with a rotator. Rotate the
antenna until the best reception is obtained. Connect
the 300 ohm antenna to the 300W ANT (red) terminals.
CONNECTING A 75 OHM ANTENNA
An unbalanced 75 ohm antenna can be connected
to the MR 77. A "type F" connector is used to connect
the 75 ohm coaxial cable to the back panel 75W ANT
input.
A VHF-TV antenna is often effective but the an-
tenna must be designed for both FM and TV reception.
Connect the leads from the VHF-TV antenna to the
300 ohm ANT (red) terminals.
CONNECTING AN INDOOR DIPOLE ANTENNA
The flexible folded dipole antenna (300 ohm) is for
use in urban or high strength signal areas.
Connect the two leads from the dipole to the 300W
ANT (red) terminals. The flexibility of the thin flat wire
assembly permits it to be placed under a rug, tacked
behind the stereo . . . or, placed in any other conven-
ient location. In some cases, it may be necessary to
"position" the antenna for best signal reception. This
should be done before it is permanently located. Avoid
locating this antenna next to other wires or metal ob-
jects. This antenna may not prove effective in houses
having metal siding or metal-clad insulation.
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