User manual MCINTOSH C22

[. . . ] STEREO PREAMPLIFIER C22 1 1 2 2 3 8 8 8 9 9 10 11 11 11 16 16 GENERAL DESCRIPTION TECHNICAL DESCRIPTION Mechanical Specifications Electrical Specifications FRONT PANEL INFORMATION INSTALLATION CONNECTIONS AC Connections AC Power Input Connections Output Connections Loudspeaker Phasing Connections Ground Connection OPERATING INSTRUCTIONS GUARANTEE 3-YEAR FACTORY SERVICE CONTRACT CONTENTS OWNER'S MANUAL C 22 C22 STEREO PREAMPLIFIER GENERAL DESCRIPTION The Mclntosh C22 Stereophonic Preamplifier is a control center for any stereophonic sound system. To increase your enjoyment of stereo, this control center does four jobs with precise control. As the record rotates on the turntable, undulations in the grooves move the pickup stylus approximately one thousandth of an inch, in any direction, from the rest position. From this slight mechanical movement, the pickup stylus generates a weak electrical impulse on the order of a few thousandths of a volt. [. . . ] When the LOUDNESS switch is moved to the COMPENSATED position, it converts the volume control to a loudness compensated control. CONTROLS BEHIND THE FRONT PANEL Depressing the PANLOC buttons allows the C22 to slide forward to a point approximately 3 inches from the mounting panel. Controls Behind the Front Panel. 7 PANLOC BUTTONS At the bottom front corners are the PANLOC buttons. After a preamplifier is installed on the PANLOC shelf, depressing the PANLOC buttons will lock the preamplifier firmly in position. Depressing the PANLOC buttons a second time (as with a ball-point pen) will release the preamplifier. The pre- amplifier can then be slid forward to the inspection and adjustment position. Releasing the ADJUST position latches allows you to slide the preamplifier completely out of its mounting shelf, or back into normal operating position. The PANLOC system gives you absolute ease of installation, operation and maintenance. INSTALLATION The C22 can be installed in conventional furniture cabinets, custom built installations or professional relay racks. If the unit is to be placed on a shelf or table-top, it is recommended that it be housed in a Mclntosh cabinet. The C22 installs conveniently from the front of the cabinet by sliding into its PANLOC shelf. To support the weight of the C22, the wood panel used to mount it should be at least ¼ inch thick. The C22 installation should allow approximately 14 inches behind the front panel to mount the PANLOC shelf and allow for connecting wires. To allow sufficient space for the circulating air, the desirable minimum internal cabinet dimensions should be 16 inches and 5½ inches respectively. CONNECTING AC CONNECTIONS There are five AC outlets on the rear panel of the C22(See Figurel4. ) These receptacles have a maximum rating of 660 watts total. The power to the four black receptacles is controlled by the POWER switch on the front panel. The red receptacle is used for powering a turntable or record changer. The receptacle is not switched so that the turntable power will not be turned off while the turntable idler wheel is engaged. The turntable is protected by this arrangement because it is necessary to turn off the turntable with its own control switch so that no damage will result to the turntable drive system. Figure 14. A-C Connections. 8 AC POWER Plug the AC power cord in 105 volt to 125 volt, 50 to 60 cycle power line. The power used by the C22 is 34 watts. INPUT CONNECTIONS The C22 provides eight separate program inputs controlled by the I N P U T SELECTOR switch. One input for tape monitor or tape comparison is controlled by the TAPE switch. The input program connections should be made in accordance with Table 1. Figure 15. CONNECTION TAPE MONITOR (COMPARE) AUX TAPE TUNER 1 & TUNER 2 FUNCTION The tape monitor input accepts a signal from a tape recorder with a monitor head and preamplifier The auxiliary input accepts any auxiliary service requiring flat frequency response, such as a T. V. The tape input operates with tape machines containing their own playback preamplifier The tuner inputs accept AM and FM outputs from a stereo tuner or a pair of stereo tuners or the multiplex output of an adapter of multiplex tuner INPUT SENSITIVITY 0. 25V 0. 25V 0. 25V 0. 25V INPUT IMPEDANCE 250K 250K 250K 250K CONNECTION PHONO 1 & 2 MAGNETIC TAPE HEAD 1 & 2 2-10 MV MIC FUNCTION These jacks are to be used with magnetic cartridges. [. . . ] You can now make a copy on the portable machine of any tape played on the permanent machine. You can copy any other program source onto both tape machines at the same time. When recording from one tape machine to Two tape machines can be used with the C22 Stereophonic Preamplifier. After you have connected your tape machine to the rear panel of the preamplifier someone may desire to bring i. n a portable machine to make a copy of one of your tapes or to listen to one of his tapes on your system. [. . . ]