Heathkit SB-10 Series Troubleshooting Manual page 108

Board Part #
Modulator 85-127P221
85-127-1
85-127-2
85-127-3
IF 85-128P222
85-128P376
85-128-2
85-128-3
85-128-4
85-128-5
Bandpass 85-129P223
85-129-2
85-129-3
85-129-4
85-129-5
85-129-6
Audio 85-130P224
85-130-1
85-130-2
85-130-3
85-130-4
RF Driver 85-131P225
85-131-2
85-131-3
85-131-4
85-131-5
85-131-6
Crystal 85-132P226
85-132-1
Heterodyne
Oscillator
85-133-1
Driver Grid
85-133-2
Driver Plate 85-131P229
85-133-3
Table 11. Printed Circuit Board Part Numbers and Usage
Printed Circuit Boards (PCBs)
Used In
SB-100, SB-101
SB-101
HW-100, HW-101
SB-102
SB-100
SB-101
SB-101, SB-102
HW-100
HW-101
SB-102
SB-100
SB-101
HW-100
SB-102
HW-101
SB-100, SB-101
SB-101
HW-100
SB-102
HW-101
SB-100
SB-101
HW-100
SB-102
SB-102
HW-101
SB-100
HW-101, SB-101, SB-102
SB-100
HW-101, SB-101, SB-102
SB-100
HW-101, SB-101, SB-102
SB-100
HW-101, SB-101, SB-102
Comments
R104 and R105 are 47, R106 is 22k, R110 is unused,
Meter zero pot is 10K and mounted externally
R106 changed to 33k, R110 changed to 510
Board is not screened for aux oscillator components
Board is not screened for sidetone volume control
Page 108