How to Connect
AUDIO OUTPUTS
Use the FIXED OUTPUT jacks to connect to a stereo
control preamplifier or other equipment which has
its own volume control. The VOLUME CONTROL does
not affect the output of the tuner at the FIXED OUT-
PUT jacks.
The output impedance at the FIXED OUTPUTS is
600 ohms. Longer cables than are normally supplied
can be used to interconnect the MR 78 with other
equipment. The length of the cable is limited by the
capacity of the cable. The total capacity must not ex-
ceed 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 equipment such as power amplifiers or tape
recorders where control of volume at the tuner is de-
sired. The load impedance connected to the FRONT
PANEL CONTROLLED jacks should not be less than
47,000 ohms. There is no difference in the signal
quality or maximum output levels available at either
pair of output jacks.
CONNECTING AN FM ANTENNA
One of three antenna systems can be used: (1) an
outdoor FM antenna, (2) an all channel (UHF-VHF-FM)
antenna, or (3) the indoor dipole supplied with the
MR 78.
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. Con-
nect the 300 ohm antenna to the 300 ANT (red)
terminals. A UHF-VHF-FM antenna is often effective
but the antenna must be designed for both FM and TV
reception. Connect the leads from the UHF-VHF-TV
antenna to the 300 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 300
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
convenient location. In some cases, it may be neces-
sary to "position" the antenna for best signal recep-
tion. This should be done before it is permanently lo-
cated. Avoid locating this antenna next to other wires
or metal objects. This antenna may not prove effective
in houses having metal siding or metal-clad insulation.
CONNECTING A 75 OHM ANTENNA
An unbalanced 75 ohm antenna can be connected to
the MR 78. A "type F" connector is used to connect
the 75 ohm coaxial cable to the back panel 75 ANT
input.
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