User manual MCINTOSH MC2102 VACUUM TUBE POWER AMPLIFIER

[. . . ] Owners Manual MC2102 Power Amplifier MC2102 McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 FAX: 607-724-0549 IMPORTANT SAFETY INSTRUCTIONS! PLEASE READ THEM BEFORE OPERATING THIS EQUIPMENT. The lightning flash with arrowhead, within an equilateral triangle, is intended to alert the user to the presence of uninsulated dangerous voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. WARNING - TO REDUCE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. To prevent the risk of electric shock, do not remove cover or back. No user serviceable parts inside. NO USER-SERVICEABLE PARTS INSIDE. [. . . ] It is secured to the MC2102 Chassis. Note: Gloves or a soft cloth will prevent fingerprinting of the Tubes during their installation. Tube Cover 1. Orient the MC2102 so the Front Panel is facing you. Using an appropriate screwdriver, rotate the two Tube Cover Screws counterclockwise, for approximately five turns, until the Tube Cover can be removed from the MC2102 Chassis and the screws are still attached to the cover. Repeat the above steps for the remaining three 12AX7A Tubes. On the top left side of the amplifier, locate the Tube Socket that has the nomenclature V3L 12AT7A next to it on the chassis. Insert the Tube, following the same procedures as in steps 3 and 4. Repeat the steps 6-9 for the remaining three 12AT7 Tubes. Caution: To prevent electrical shock make sure that the MC2102 Tube Cover is installed before connecting the AC Power Cord. KT88/6550 12AX7A 12AX7A 12AT7 Figure 5 12AT7 Tube Cover Fastening Screw Locations Before operating the MC2102, locate the previously removed Tube Cover and perform the following steps: Installing the Tube Cover: 1. The Tube Cover has a wide opening along one side of its longer dimension. Orient this wide opening so that it is facing towards you. Carefully place the Tube Cover onto the MC2102 while at the same time aligning the screws with the openings on the MC2102 Chassis. Using an appropriate screwdriver secure the Tube cover to the chassis, approximately five turns, do not over tighten the screws. Tube Cover Figure 6 Warm Air Location and Ventilation Adequate ventilation extends the trouble free life of the MC2102. The suggested minimum space for operating the MC2102 is 24 inches (60. 96cm) in width, 22 inches (55. 88cm) depth, and 22. 5 inches (57. 15cm) in height. Always allow air to flow through the ventilation holes on the bottom of the amplifier and a means for the warm air to escape at the top, refer to figure 7. For installation of the MC2102 into a cabinet, refer to the next page. Cool Air Figure 7 7 Installation in a Custom Cabinet 1 inch (2. 54cm) in front of the mounting panel for knob The MC2102 can be placed upright on a table or shelf, standing on its four feet. It also can be custom installed in a clearance. Be sure to cut out a ventilation hole in the mounting shelf according to the dimensions in the drawing. piece of furniture or cabinet of your choice. The four feet may be removed from the bottom of the MC2102 17-1/4" when it is custom installed 43. 82cm as outlined below. The four feet together with the mounting screws should be retained for possible future use if the MC2102 is re8-1/4" moved from the custom in20. 96cm MC2102 Front Panel stallation and used free standing. The required panel Custom Cabinet Cutout cutout, ventilation cutout and unit dimensions are shown. Always provide adequate ventilation for your MC2102. Cool operation Cutout Opening for Custom Mounting ensures the longest possible 12" Cabinet operating life for any elec30. 48cm Front tronic instrument. [. . . ] Watts- The meters respond to all the musical information being Figure 16 produced by the amplifier. They indicate to an accuracy of at least 95% of the power output with only a single cycle of a 2000Hz tone burst. Hold - The meter pointer is locked to the highest power peak in a sequence of peaks. It is electronically held to this power level until a higher power peak passes through the amplifier. [. . . ]