It is recommended that the MR 78 tuner be mounted
in a normal or horizontal position. However, with ade-
quate ventilation the tuner can be mounted in any
position.
Adequate ventilation extends the trouble-free life
of electronic instruments. It is generally found that
each 18° F rise in operating temperature reduces the
life of electrical insulation by one half. Adequate
ventilation is an inexpensive and effective means of
preventing insulation breakdown that results from
unnecessarily high operating temperatures. The direct
benefit of adequate ventilation is longer, trouble-
free life.
The MR 78 tuner requires a mounting space that is
at least 15 inches deep, 17½ inches wide and 6 inches
high. Provide additional space for the air flow across
the bottom of the tuner and a means for warm air to
escape at the top.
Remove the tuner, shelf brackets, parts bag and the
mounting template from the carton. Remove tuner
from the plastic bag and place the tuner upside down
on the shipping pallet, then remove the four plastic
feet fastened to the bottom of the chassis.
The installation may be accomplished in six easy steps.
1. POSITION TEMPLATE AND MARK
Position the plastic mounting template over the
area of the cabinet panel where the MR 78 is to be
installed. Be sure that the edges of the template
clear any shelves, partitions or existing equipment
located behind the panel. With the template in place
mark the six "A" and "B" holes and four small holes
locating the corners of the cutout. Next, join the
four corner marks with pencil lines; the edge of the
template may be used as a straight edge.
2. DRILL HOLES
Holding a drill perpendicularly to the panel, drill
the six "A" and "B" holes using a 3/16 inch drill.
THE SIX HOLES MUST BE DRILLED BEFORE
MAKING THE CUTOUT.
3. SAW CUTOUT
Using a saw carefully cut the rectangular opening
on the inside of the pencilled rectangle.
4. SECURE MOUNTING STRIPS
Secure mounting strips (supplied in the hardware
package) on the inside of the cabinet panel.
Insert two screws (supplied in the hardware pack-
age) into the center holes ("B" holes on the tem-
plate). Use the ¾-inch long screws for panels under
½-inch or 1¼-inch screws for panels ½-inch thick
or over. Place a mounting strip on the back of the
cabinet panel as shown. Align it with the three holes
in the panel and tighten the screw. The screw head
should pull slightly into the wood panel. Attach the
other mounting strip by repeating the procedure.
5. MOUNT PANLOC SHELF BRACKETS
Attach the Panloc shelf brackets to the cabinet panel
using four screws of the proper length. Place the
template over the mounting screws. The screws
should be centered on the "A" and "B" holes in the
template. If necessary, loosen the screws and push
the mounting brackets into alignment then retighten.
6. INSTALL THE UNIT
Thread the power cord through the opening on the
cabinet panel. Carefully slide the instrument into
the opening so the rails on the bottom engage the
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