Crown D-150, D-150-A Schematic

2

1.2 SPECIFICATIONS

1.2.1 STEREO SPECIFICATIONS

Output Power

Frequency Response
1KHz

Power

Harmonic Distortion

I.M. Distortion

(60Hz-7KHz

Slewing Rate

Damping Factor
Output Impedance
Load Impedance

Voltage Gain

4:1)

80 watts per channel minimum RMS (both channels
operating) into an 8 ohm load over a bandwidth of 1Hz-20KHz
at a rated RMS sum total harmonic distortion of 0.05% of the
fundamental output voltage.

±0.1dB DC-20KHz at 1 watt into 8 ohms;

90 watts RMS into 8 ohms, per channel, both channels operating, 0.1% total harmonic
distortion.

Less than 0.001% from

watts RMS per channel into 8 ohms.

Less than 0.05% from 0.01 watt to 0.25 watts and less than

watts into 8 ohms, per channel.
6 volts per microsecond (slewing rate is the maximum

output signal, or the maximum slope of the output signal).
Greater than 400,
Less than 15 milliohms in series with less than 3 microhenries.
Rated for 8 ohm usage; safely drives-any load including completely reactive loads,

20.6±2%

or

26.3±.2dB

20Hz-400Hz,

DC-400Hz

into 8 ohms.

at maximum gain.

±1dB DC-100KHz.

and increasing linearly to 0.05% at

0.01%

value of

the

from

0.25

first

derivative

20KHz

watts to

at

80

of the

80

Input

Sensitivity

Output Signal

1.19 volts

Unbalanced, dual channel.

±2%

for 80 watts into 8 ohms.

PARTS LIST, D-150A Page 2

Schematic
Designation

R115, R215

R11
R116, R216
R117, R217
R118, R218

R123, R223

Description

10K

ohm ½ watt 1% Film

820 ohm ¼ watt 10%
33K ½ watt 5%

120 ohm ½ watt 5% Film

82 ohm ¼ watt 5% Film

5.1K

1 watt 5%

27K

½

watt 5% Film

82 ohm

2.2K ½
750 ohm

15 ohm

Selected

¼

watt 10%

watt 5% Film

¼

watt 5%

¼

watt 10%

Crown
Part

#

2343

3301
3137
3837

3960

2808

3970
3300
3145
3803
3614

Other Information

47 ohm ¼ watt 5%

180 ohm ¼ watt 10%

½

5.6 ohm

180K

2.2K

1.5K

200K

91K

6.2K ¼

2.7K
390 ohm

Semiconductors

Selected

watt 5%

¼

watt 10%
½ watt 10%
2 watt 10%

¼

watt 5%

ohm ¼ watt 5%

watt 5%

1 watt 10%

½

watt 10%

2N3859A

1011

2873

3299

2884

1’036
3303
3622
3621
3619

1079
2609

2961

Q2

2N4125

PN4250A

3625

3786

PARTS LIST,

D-150A Page 3

Schematic
Designation

Q102,Q202
Q105,Q205
Q107,Q207

Q112,Q212

D1, D2
D106, D206
D102, D202

D4,

D3,
D107, 0207

D5

DlOO,D200
DlOl,D201

D103,D203
D104,D204
D105,D205

IC-lA,

B

IC-lA;B

Description

MPSA93

MPSL01
NSD106
NSD206

1

N4003

IN961B 1OV

IN270
IN4148

Dual

µA739PC OP

Dual uA749 OP AMP

Zener

AMP

Crown

Part #
3578
3232
4069
4116

2851

3549
3447
3181

3231*
3643*

*NOTE: R108, 208 are omitted

Other Information

when uA739 is used, and
when uA749 is used. See R108,208
under resistors.

3.3K

LlOO,

L200

L102, L202

Miscellaneous
.5

MH axial lead choke
Main PC board
TO-92 D-clip
D-150A PC board mount bracket

#6 internal star washer
6-32 Hex nut

3/8

6-32 x

Dual TO-92 cooler
14 pin DIL IC socket

Transistor lead PC receptacle

OUTPUT INDUCTOR ASSY.

Output coil, torroid form 2850
Nylon washer 3609
#16 brown wire

BHP screw

3510
9604
3953
9562

1823

1889
2134
3493

3450
3519

40959

2812

Mounts over
Fastens 3953 to PC board
Used to mount 9562.
Used to mount 9562.
Used to mount 9562.

Mounted over Q102, Q202.
Socket for
Used to mount R128, R228.

One on each side of coil.

Q111, Q211

IC-1.

#8

int. star washer

1951

Used to mount coil