McIntosh C29 Service Manual

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11113111113511

C329

PREAMPLIFIER

SEEIVICE INFORMATION

STARTING WITH SERIAL NO. 821001

MclNTOSH LABORATORY INC. BINGHAMTON. NEW YOFIK 13903

039 049

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PERFORMANCE LIMITS

FREQUENCY RESPONSE

+ O -O.5 d8 20 Hz to 20.000 Hz

DISTDRTIDN

.02% maximum at rated output level. 10 Hz
20.000 Hz

INPUT SENSITIVITY AND IMPEDANCE

AUXILIARY. TUNER. TAPE 2. 0.25 volts at
250.0uu ohms; PHono I and PHono 2. 2 millivolts
Il.000 Hz) at h7,000 ohms and 65 pF; MICRO-
PHONE. 2.5 millivolts at 500,000 ohms

HUM AND NOISE

AUXILIARY. TUNER, TAPE I. TAPE 2. IHFA IOO dB
unweighted 90 dB below rated output; PHDNO l.
PMOND 2 IHFA 90 dB. unweighted 80 dB below I0
millivolts input, equivalent to less than I.0
microvolt at the Input terminals; MICROPHONE
I.5 mlcrovolts at the input terminals.

OUTPUT LEVEL AND IMPEDANCE

MAIN: 2.5 volts with rated Input. less than
IOO ohms source impedance. to operate into
I0.DOO ohms or greater.

TAPE: 0.25 volts with rated input. less than
200 ohms source impedance. to operate into
l0.000 ohms or greater.

HEADPHDNE LINE: 0.75 volts into 8 ohm load

or 2.5 volts into 600 ohm line, M7 ohm source
Impedance. level controls provided.

VOLTAGE AMPLIFICATIDN IN DECIBELS
fiUXILIARY, TUNER, TAPE I and TAPE 2

to MAIN output 20 dB
to IAPE output 0 dB
to NEADPHONE/LINE Output 30 dB
PHONU I and PHONO 2 at I kHz

to MAIN output 62 dB
to TAPE output #2 d8
to HEADPHONE/LINE Output 72 dB
MICROPHONE

to MAIN output 60 dB
to TAPE output #0 dB

to HEADPHONE/LINE output 70 dB

POWER REQUIREMENT
120 volts. 50/60 Hz. us watts

HECHANICAL INFORMATION

SIZE: Front Panel measures 16 Inches wide

(h0.6 cm) by 5-7/i6 Inches high (I3.8 cm).
Chassis measures lh-Blh Inches wide [37.5 cm)
by h-lS/I6 Inches high (I2.2 cm) by l3 inches
deep (33.0 cm), including PANLOC shelf and
back panel connectors. Knob clearance required
is Ill inches (3.2 cm) in Front of the mount-
ing panel.

WEIGHT: l9 pounds (8.6 kg) net. 3| pounds
(ih.l kg) In shipping carton.