McIntosh MAC 1900, Руководство пользователя

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2. CONNECTING RECORD PLAYERS
CONNECTING A 75 OHM ANTENNA
The MAC 1900 has been shipped with shorting
plugs in the phono inputs. Remove the shorting
plugs only from the jack that will be used.
Connect a cable from the "left" channel of a
record player into the " L " PHONO 1 input jack.
Connect a cable from the "right" channel of a
record player into the "Ft" PHONO 1 jack.
PHONO 2 is provided for the use of a second
record player.
Connect a second record player in the same
way to the L and R PHONO 2 INput jacks.
3. GROUND CONNECTION:
A ground post is provided. Grounds for turn-
tables, record changers, tape decks, etc. should
be connected to this post. To prevent hum, make
sure the ground wire does not make any connec-
tions to the shields of the left and right program
cables between the program source and the MAC
1900. The left and right program cables and the
ground wire from that source should be wound or
twisted together.
CONNECTING AN FM ANTENNA
One of three antenna systems can be used: (1) an
outdoor FM antenna, or (2) a VHF-TV antenna, or (3)
the indoor dipole supplied.
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. Ro-
tate the antenna until the best reception is obtained.
If the antenna uses a 300 ohm lead, connect it to the
300 ANT (red) push connector.
A VHF-TV antenna is often effective when it is de-
signed for both FM and TV reception. Connect the
two leads from the VHF-TV antenna to the 300
ANT (red) push connector.
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) push connector. 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
located.
Avoid locating the antenna next to other wires or
metal objects. This antenna may not prove effective
in houses having metal siding or metal foil insulation.
An unbalanced 75 ohm antenna can be connected
to the MAC 1900. A "type F" connector is used to
connect the 75 ohm coaxial cable to the back panel
FM ANT 75 input.
AM ANTENNA
For most local and moderately distant AM recep-
tion the built-in ferrite loopstick antenna may be
used. The AM loopstick antenna is on a swivel base.
It must be rotated for best reception.
Better long distant reception is possible with the
use of a copper antenna wire 50 to 150 feet in length.
Suspend the wire in a straight line as high as pos-
sible. Attach the wire at each end with suitable glass
or ceramic insulators. Connect a lead-in wire at any
convenient point on the antenna. It is recommended
that a lightning arrester be used with an outdoor AM
antenna. The arrester should be well grounded to a
suitable water pipe or copper or aluminum rod sunk
into the ground.
Connect the lead-in wire to the AM ANT (white)
push connector on the antenna terminal strip on the
back panel.
CONNECTING A MAXIMUM
PERFORMANCE INDICATOR
The Mclntosh MAXIMUM PERFORMANCE IN-
DICATOR is connected to the TP 1 and TP 2 jacks on
the back panel of the MAC 1900. Use the procedures
as directed in the MAXIMUM PERFORMANCE IN-
DICATOR owners manual.
FUSE
A 3.2 AMP "SLO-BLO" fuse protects the receiver
circuits. This fuse does not protect additional equip-
ment connected to the back panel AC outlets.
AC POWER OUTLETS
There are 2 black and one red AC power outlet.
The power to the black outlets is controlled by the
front panel AC power switch on the VOLUME control.
Use these outlets for a power amplifier, or tape re-
corder, etc. The red receptacle is on at all times. Use
the red outlet for a turntable or record changer. The
turntable is protected by this arrangement. It is nec-
essary to turn off the turntable or record changer
with its own AC power switch.
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