Symetrix 501 Schematic

6	5	4	3	2	1

D

C

B

A

INPUT

J1

XLR-FEMALE

2

1 3

4

CHGND

J2

SIDECHAIN (SH2)

				C5
				47pF
R38		R1		R3
2K10		43K2		45K3
		2	-	U1A	C7
				1
		3
			+	BA4560	4.7NP
R100		R2
2K00		13K0
C1	C2	R4		C6
.001	.001	15K0		150pF

REVISION RECORD

LTR

REVISIONS DONE OR ECO NUMBER:

DATE:

F.3

Redraw in PADS; chg 5% resistors w/ 1%.

0 3 / 1 2 / 9 6

F.4

Changed R102 from 130 ohms/5% to 121

0 5 / 0 9 / 9 6

+15V

ohms/1% to standardize on 1% values.

F.5

Changed note on pg3 to make R29-30 20 Ohm 1 0 / 8 / 9 7

R119

3 CW

R118

* * *

* * *

2

C9

100K

TRIM

768K

C10

*** SEE NOTES ON PAGE 3 REGARDING OUTPUT

1

+15V

TRANSFORMER OPTION (501-01)

OUTPUT

82pF

82pF

C13 * * *

R20

-15V

3

7

R22

+

EC1

VCC

13K0

R5

10K0

100/35

J3

1

U2

8

6

U1B

R21

T2 * * *

XLR-MALE

IN

2150A

OUT

-

7

2

U4A

R30 * * *

121005

13K0

S

V

E

G

5

-

1

5

7

2

Y

E

C

N

+

BA4560

10K0

3 +

1

100.0

M

E

2

D

BA4560

3

4

5

2

6

+15V

R31

4

100K0

+15V

R6

4

2

CHGND

3

51.1 OHM

CW

R9

J4

3

6

8

R17

2

R10

CW

OUTPUT

100K

2

R11

1M

TRIM

7K50

50KB GAIN

1

R7

R32

5K11

R8

1

100K0

61.9 OHM

-15V

5

U4B

R29 * * *

1

-15V

+

7

3

-15V

6

-

BA4560

100.0

C14 * * *

R19

+

+15V

VC

100/35

825 OHM

( S H 2 & 3 )

+15V

R18

61.9 OHM

R37

2K37

R35

200K0

D2

OUTPUT

9

+

U9D

RED

R33

D1

14

PEAK

8

-

LM339

10K0

1N4148

R34

C17

R36

1M

.1uF

49K9

		COMPANY:	SYMETRIX, INC.
			14926 35th Avenue West
			Lynnwood, WA 98037-2303		USA
		TITLE:					REV:
A	DATED:	501 LIMITER - COMPRESSOR					F.5
DRAWN:
B	0 3 / 1 2 / 9 6
S
		DRAWING NO:	020150
RELEASED:	DATED:				SHEET:	1 OF 3

D

C

B

A