Text preview for : hfe_c-audio_ra1000_2000_3000_schematics.pdf part of C-AUDIO hfe c-audio ra1000 2000 3000 schematics . Rare and Ancient Equipment C-AUDIO RA3000 hfe_c-audio_ra1000_2000_3000_schematics.pdf
Back to : hfe_c-audio_ra1000_2000_3 | Home
F
LABEL
R144 HT+
22R
R24 R25 R27 R29 GATE RESISTORS R127 - R132
150R 2K7 680R 82K
100NF/ C21 LABEL
D1 LT+1
100V OPT
C20 1N4148
Q3 D28
Q4
BF422 IN4004
BF422
C17 Q11 Q12
R37 R31
100UF BF422 BF423
OPT D19
D2 VR3 100R Q16 IN4004
1N4148 470R BF422 R127 R128
R28 560R 560R
E
100R BF422
Q5 Q6 Q17
BC184L BC184L A
C31 Z5
R43
OPT
330R
Q1
BF423
Z3 R39 R30
Q15
6V2 5K6
BF422
R33 R46 R47 R35 R60 R59 1K
CHOKE1
100R 100R 100R 100R OPT 39K
D5
R41
C24 1N4148
100UF/ 220R 15 TURNS
LABEL 16V LABEL
AMP1 R11 R73 O/P1
VR1
1K
1K C28 10R/2.5W
C30
100UF
C25 100NF D
100UF / D6
25V R72 R146
1N4148
R44 R45 R48 R49 10R/2.5W 10R/2.5W
100R 100R 100R 100R
C22 R34 R32 Z4 R40 R58
C29
220PF 39K 220K 6V2 100UF/ 1K5
16V C23 1K
100NF
Z6 C42 C41
R42
100NF/250V 100NF/250V
R36 R38 220R
1K 220K
Q7 Q8 B
LABEL BC214L BC214L
GND1 Q18
BF423
LABEL
Q2 GND
BF422 R56 100R R115 R116
Q19
560R 560R
Q13 BF423
R51
BF422
C
100R
Q9 Q10
D29
R50 BF423 BF423 D20
IN4004
OPT IN4004
C18 D3
1N4148
Q14
100NF/ LABEL
R52 BF423 LT-1
250V C34 330R R53 R55 R57
OPT 2K7 680R 82K GATE RESISTORS R115 - R120
C33 D4
1N4148 LABEL
R143 HT-
22R
R71
47R
B
DIAGRAM SHOWS RA1000 OUTPUT ON AMPLIFIERS WITH FLAT PACK
STAGE. RA2000 AND RA3000 (J162 K1058) MOSFETS
OUTPUT STAGES DIFFER IN THE
NUMBER OF OUTPUT DEVICES PER FIT A 10pF >=250V WORKING
RAIL. THE RA2000 USES 4 DEVICES ACROSS THE GATE, DRAIN OF
PER RAIL AND THE RA3000 USES 6 EACH K1058 MOSFET
DEVICES PER RAIL. ADDITIONAL
OUTPUT DEVICES ARE
CONFIGURED SIMILARLY WITH
560R GATE RESISTORS AS SHOWN. QUIESCENT VOLTAGE ADJUSTMENT
THIS IS MEASURED ACROSS THE
GATE DRIVE AT POINTS A B
TO GIVE 300mV +/- 10mV
Title
CHANNEL 1 AMPLIFIER A
Size Number Revision
RAMAIN 2 3
A3
Date: 1-Jul-1999 Sheet of 2 6
File: D:\PROTEL\RANEW\RAMAIN.S02 Drawn By: LMB
F
LABEL
R145 HT+
22R
C62
OPT GATE RESISTORS R133 - R138
R114 R113 R111 R109
C63 150R 2K7 680R 82K
100NF/ LABEL
D17 LT+2
100V 1N4148
Q42 D32
Q41
BF422 IN4004
BF422
C66 Q34 Q33
R103 R104
100UF/100V BF422 BF423
OPT D21
D18 VR4 100R Q30 IN4004
1N4148 470R BF422 R133 R134
R110 560R 560R
Q29 E
100R BF422
Q40 Q39
BC184L BC184L A
C47 Z8
R106
OPT
330R
Q44
BF423
Z11 R96 R108
Q28
6V2 5K6
BF422
R101 R92 R91 R99 R76 R77 1K
CHOKE2
100R 100R 100R 100R OPT 39K
D13
R94
C60 1N4148
100UF/ 220R 15 TURNS
LABEL 16V LABEL
AMP2 R88 R75 O/P2
VR2
1K
1K C55 10R/2.5W
C50
100UF
C56 100NF D
100UF / D14
25V R74 R147
1N4148
R89 R93 R90 R87 10R/2.5W 10R/2.5W
C61 R100 R102 100R 100R 100R 100R
220PF 39K 220K Z10 R95 R78
C54
6V2 100UF/ 1K5
16V C59 1K
100NF
Z9 C43 C44
R107
100NF/250V 100NF/250V
R98 R97 220R
1K 220K
Q38 Q37 B
LABEL BC214L BC214L
GND2 Q27
BF423
LABEL
Q43 GND
BF422 R80 100R Q26 R121 R122
BF423 560R 560R
Q32
R86
BF422
C
100R
Q36 Q35
R85 BF423 BF423 D31 D22
OPT IN4004 IN4004
D15
C65 1N4148
Q31
100UF/100V 100NF/ LABEL
BF423 LT-2
250V C51 R84 R83 R81 R79
OPT 330R 2K7 680R 82K GATE RESISTORS R121 - R126
C52 D16
1N4148 LABEL
R142 HT-
22R
R105
47R
B
DIAGRAM SHOWS RA1000 OUTPUT ON AMPLIFIERS WITH FLAT PACK
STAGE. RA2000 AND RA3000 (J162 K1058) MOSFETS
OUTPUT STAGES DIFFER IN THE
NUMBER OF OUTPUT DEVICES PER FIT A 10pF >=250V WORKING
RAIL. THE RA2000 USES 4 DEVICES ACROSS THE GATE, DRAIN OF
PER RAIL AND THE RA3000 USES 6 EACH K1058 MOSFET
DEVICES PER RAIL. ADDITIONAL
OUTPUT DEVICES ARE
CONFIGURED SIMILARLY WITH
560R GATE RESISTORS AS SHOWN. QUIESCENT VOLTAGE ADJUSTMENT
THIS IS MEASURED ACROSS THE
GATE DRIVE AT POINTS A B
TO GIVE 300mV +/- 10mV
Title
CHANNEL 2 AMPLIFIER A
Size Number Revision
RAMAIN 3 3
A3
Date: 1-Jul-1999 Sheet of 3 6
File: D:\PROTEL\RANEW\RAMAIN.S03 Drawn By: LMB
LABEL
C7 10PF HT+
JACK1
NOTE:- FOR AMPS WITH FLAT PACK MOSFETS
MC33079 IC IS FITTED TO POSITION IC1 R10 F
R12 10K
1
XLR1
11
IC1A C6 C4
3 C9 10PF
MC33079 R7 R9
R1 1K R2 9K1
2
1K 100K
1
100UF/16V 100UF/16V R13 100K
3 C15
COAX2SYM COAX2SYM 100UF/16V
BLUE R3 1K R4 9K1
2
RED 6
4
SCR 7
5
Z1
2
C3 18V
10PF C5 E
XLR2 R5 R6 R8 IC1B R22
100UF/25V
10K 100K 47K MC33079 100K
C2 C1
220PF 220PF LABEL
3 GND
COAX2SYM
Z2
18V
C16
100UF/25V
1
RED
BLUE
SCR
COAX2SYM
R23
9
8
10 LABEL
HT- D
IC1C
MC33079
SEE NOTE:- VOL1
50K LIN LABEL
AMP1
LABEL
GND1
C8 10PF
2
XLR3
R14 10K RA3000/1 R10, R23 6K8/1W
RA2000/1 R10, R23 6K8/1W
C14
R15 1K R17 9K1 C13 RA1000/1 R10, R23 4K7/1W
3 13 100UF/16V
R21 1K C
14
12
100UF/16V
R16 1K R18 9K1
COAX2SYM COAX2SYM
BLUE IC1D
1
RED MC33079
SCR
C12 BRIDGE/STEREO
10PF MODE SWITCH
R19 R20
1
COAX2SYM COAX2SYM
10K 100K RED
XLR4 C11 C10 COAX1SYM COAX1SYM
LABEL
220PF 220PF BLUE RED AMP2
SCR
SCR
3 COAX2SYM LABEL
GND2
SW2
B
2
RED
BLUE
SCR
GREEN GREEN YELL RED
LABEL
JACK2 LT+
RGND 10R/2.5W COAX2SYM
LABEL
SW1 LEDBR
GROUND LINK
SWITCH VOL2
RA INPUT PCB 50K LIN
Title
INPUT STAGE CIRUITRY A
Size Number Revision