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INSTRUCTION MANUAL
McINTOSH MODEL MC-30
30 WATT POWER AMPLIFIER
Type A-116B
Serial #9E341 and above
038-243
MCINTOSH LABORATORY, INC
DESCRIPTION
The McIntosh Model MC-30 i 3s a 0 watt high d fidelity power amplifier designe for home en-
tertainment systems and pr o fes s ion a l applications. The Model MC-30 is similar to the earlier
McIntosh Model A-116 30 watt amplifiers and includes all of the rigid electrical specifications
and features found in these earlier units plus: less than 1/3% harmonic distortion at any power
output up t 3o 0 watts and at any frequency in the audio spectrum, 20 to 20,000 cps; less than
1/2% intermodulation distortion if instantaneous peak power is below 60 watts for any combin-
ation of frequencies 20 t 9o 20, 000 cps; and noise and hum level 0 db or more below rated output.
The famous McIntosh high efficiency output circuit i ts used o obtain the high standard of per-
formance found in this amplifier.
The MC-30 maybe operated from any signal source delivering 0. 5 or more volts, or d ire c tly
from a McIntosh Audio Compensator or Pre-Amplifier, such as the Models C-8, C-4, C-104,
or C-108. Output impedances of 4, 8 and 16 ohms are provided for direct connection to loud-
speakers. Additional outputs for 166 ohms (70.7 volts) and 600 ohms are provided for use with
multiple speaker systems, lines, etc.
INSTALLATION
Location
The MC-30 should be located i on a ventilated area. If the amplifier is housed in a cabinet r
other enclosure, holes should be provided for air circulation.
Input Connections
1. When a McIntosh Audio Compensator or other McIntosh pre-amplifier is used with the
MC-30, plug the pre-amplifier's output-power cord into the "Pre-Amp input" receptacle on the
MC-30 and turn the "gain" control fully counter clockwise. This receptacle supplies the re-
quired plate and filament power to the pre- a m plif i e r equipment as well as providing the neces-
sary audio connection.
For pre-amplifier installation and operation refer to the p r e -amplifier's instruction manual.
2, When a signal source of 0. 5 volts or more is used to drive the amplifier, such as the
output from a tuner, tape recorder, or pre-amplifier, plug the source into the "0. 5 volt input"
pin jack receptacle or connect to the "0.5 volt" and "GND" screw terminals. Use the "gain"
control to obtain the desired operating level.
GU AR AN TE E
We guarantee the performance of this equipment and the mechanical and electrical workman-
shipto be free of defects for a period of 90 days. This guarantee does not extend to components
iamaged by improper use nor does it extend to transportation to and from the fac to r y.
SERVICE I N FO R MAT I ON
All McIntosh equipment is designed far long trouble fr e e o p era t ion . All com p on ent s are of
highest quality and are conservatively operated. If trouble develops the a mpl if ie r m ay be ser-
viced by your franchised dealer, a competent ser vic em an , or r e tu r n ed to the f a c t o r y . E qu ip -
ment will not be accepted at the fa ct o ry unless f a c t o r y re t u r n a uth o r iza t i on is fi r s t re c e iv e d .
The following chart of operating voltages and re s i s t a n c e s is o f f e r e d as a g u i de fo r s e r v i c i n g the
unit. All voltages and res i s t e n c es ar e me as ur ed to ch a s s i s ex ce pt those wit h a s t e risk (*).
These are measur ed to chassis with pin # o2 f the 5U4GB g r o u n d e d . Vo l ta g es are m e a s u r e d
with high impedence V T V M . N O T E - - U N I T MUST BE T U R N E D OFF WHEN MEASUR ING RE-
SISTENCES.
VOLTAGE A N D RESISTANCE CHART
Tube
12AX7
(Input)
12AU7
12BH7
Pin No.
1
2
3
4&5
6, 7, 8
9
1
2
3&8
4&5
6
7
9
1
2
3&8
4&5
6
7
9
DC Volts
No Signal
134
0
1.2
Fil
-
Fil
270
134
138
Fil
270
110
Fil
355
0
16
Fil
355
0
Fil
DC Volts
at 30W out
120
0
1. 1
6. 3 V. ac t Pio n 9
-
-
235
120
126
6. 3 V. ac to Pin 9
235
100
•
295
0
14
6. 3 V. ac to Pin 9
295
0
-
AC V olts
at 30W out
1. 3
0. 24
0. 22
-
-
-
9
13
0. 57
-
9
0
-
132
9
0. 32
132
9
-
Res i s t a n ce
U n i t off
330K*
1M
3 . 3 K
0 to 70
-
0 to 70
40*
330K*
13K
0 to 70
43 K *
26M *
0 to 70
12K*
220 K
1. 2K
0 t 7o 0
12K*
220K
0 t 7o 0
Produktspecifikationer
| Varumärke: | McIntosh |
| Kategori: | mottagare |
| Modell: | MC-30 |
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