INSTRUCTION MANUAL MclNTOSH MODEL MC-60 60 WATT POWER AMPLIFIER Type A-121 Serial No. 5F846 and above MclNTOSH LABORATORY, INC. 2 Chambers St. Binghamton, N. Y. U.S.A.
ELECTRICAL AND MECHANICAL SPECIFICATIONS Specifications for the Mclntosh Model MC-60 Audio Amplifier Power Supply 117/125 volts, 50/60 cycles Power Consumption 280 watts at 60 watts output 155 watts at zero signal output Power Output 60 watts continuous Input Level Input #1, 0. 5 volts to 30 volts, with gain control Input #2, 2. 5 volts (for use with Mclntosh Audio Compensators and Pre-Amps) Frequency Range 20 to 30, 000 cycles ± .1 db at 60 watts output 16 to 60, 000 cycles ± .
DESCRIPTION The Mclntosh Model MC-60 is a 60 watt high fidelity power amplifier designed f o r home entertainment systems and professional applications where high power and distortion free performance is required. The Model MC-60, like all other Mclntosh power amplifiers, uses the exclusive Mclntosh high efficiecny output circuit and bifilar output transformer to obtain the high standard of performance found in this amplifier. Some of the more important characteristics of the amplifier are; less than 0.
WARNING: Output plugs wired for Mclntosh 20W-2 and 50W-2 amplifiers must not be used with the MC-60 without rewiring the plug. Output connections for the MC-30 are the same as those for the MC-60. Power Connections The MC-60 operates from any 110 to 130 volt 50-60 cycles power line. (When continuous use is contemplated on 120 to 130 line volts the transformer primary should bo re-connected using the 125 volt tap.
Tube 12AX7 Pin No. 1 2 3 4&5 6 7 a 9 KT-88/6550 (Both tube*) 1 2 3 4 5 6 7 5U4GB (Both tubes) 8 1 2 3 4 5 6 7 8 DC Volts No Signal DC Volts at 60W out 435 -46 365 -45 Fil 435 -46 -45 Fil 0 Fil 435 435 -45 - Fil .8 440 37 5 AC AC Volts at 60W out -46 -45 6.3V ac to Pin 9 36S 106 148 148 - 106 .46 -45 - 148 148 - 0 0 6. 3V.ac to Pin 7 106 110 365 365 -45 2.5 - 380 - 148 110 8.
SERIAL NO 3FB46 AND ABOVE Plate Plate Choke Choke C1 .1mF, 200V C2 100mF, 12V C3 8mF, 250V C4 .22mF, 400V C5 ,047mF, 600V C6 .047mF, 600V C7 .22mF, 600V C8 .22mF, 600V C9 .47mF, 200V C10 .47mF, 200V C11 470mF, 500V C12A 35mF, 500V C12B 80mF, 500V C12C 15mF, 450V C13A 35mF, 500V C13B 80mF, 500V C13C 15mF, 450V C14 8mF, 250V CH1 CH2 PRE-AMPLIFIER INPUT SOCKET CONNECTIONS Pin 1 - Ground Pin 2 - Pre-Amp Input (2.5V) Pin 3 - Not used Pin 4 - +360V at 3.5 mA Pin 5 - Pre-Amp input (0.
038-177 Be102002
