HP 428B Operating And Service Manual page 47

Model 428B
Circuit
Stock No.
Reference
A1, 2 428B-26A Assembly: ww resistor,
A1 includes, R3 thru R6
A2 includes, R7 thru R10
A3 428B-26B Assembly: ww resistor, includes R2, 11
C1 0140-0099 fxd, mica, 1K pf +1%, 500 vdcw
C2 0131-0004 var, mica, 14-150 pf, 175 vdcw
C3 thru C10 Not Assigned
C11 0150-0014 fxd, cer, 5K pf, 500 vdcw
C12 0180-0050 fxd, elect, 40 uf -15% + 100%, 50 vdcw
C13 0170-0022 fxd, my, 0.1 uf +20%, 600 vdcw
C14 nsr, part of T1 assembly
C15 0150-0012 fxd, cer, 10K pf +20%, 1000 vdcw
C16, 17 0170-0019 fxd, my, 0.1 of +5%, 200 vdcw
C18 nsr, part of T1 assembly
C19 0150-0012 fxd, cer, 10K pf +20%, 1000 vdcw
C20 Not Assigned
C21 0180-0059 fxd, elect. 10 uf -10% + 100%, 25 vdcw
fxd, TiO
C22, 23 0150-0015
2
C24 0170-0078 fxd, my, 0.47 uf +5%, 150 vdcw
C25 0180-0058 fxd, elect, 50 of -10% + 100%, 25 vdcw
C26 0150-0012 fxd, cer, 10K pf ±20%
C27 0140-0099 fxd, mica, 1K pf +1%, 500 vdcw
C28, 29 0150-0012 fxd, cer, 10K pf +20%, 1000 vdcw
C30 Not Assigned
C31 0170-0019 fxd, my, 0.1 of +5%, 200 vdcw
C32 0140-0034 fxd, mica, 22 pf +5%, 500 vdcw
C33 thru C40 Not Assigned
C41 0140-0108 fxd, mica, 253 pf +2%, 300 vdcw
C42 0140-0041 fxd, mica, 100 pf +5%, 500 vdcw
C43 thru C50 Not Assigned
C51 0170-0019 fxd, my, 0.1 of +5%, 200 vdcw
C52 0140-0149 fxd, mica, 470.pf +5%, 300 vdcw
C53, 54 0140-2102 fxd mica, 8.2K*pf +2%, 500 vdcw
C55 0140-0147 fxd, mica, 180 pf +5%, 500 vdcw
C56 thru C60 Not Assigned
C61 0180-0011 fxd, elect, 20 uf 450 vdcw
C62A/B 0180-0012 fxd elect, 2 sect, 20 of sect 450 vdcw
C63 0140-0031 fxd, mica, 220 pf +10%, 500 vdcw
Circuit Stock No.
40
Description #
2.2 pf +10%, 500 vdcw
2
1000 vdcw
Description
Reference
C64 0150-0012 fxd cer, 10K pf +20%, 1000 vdcw
C65 0180-0058 fxd, elect, 50µf -10% + 100%, 25 vdcw
C66 0180-0104 fxd, elect, 200 µf 15 vdcw
C67 Not Assigned
C68 0170-0022 fxd, my, 0.1 pf +20%, 600 vdcw
C69 0180-0104 fxd, elect, 200 µf, 15 vdcw
CR1 thru CR8 1901-0028 Diode, Si
CR9 1902-0013 Diode, Si
CR10 1902-0014 Diode, Si
DS1 2140-0012 Lamp:
F1, 2 2110-0007 Fuse:
2110-0008 Fuse:
F3 2110-0012 Fuse:
J1 1251-0089 Connector: female, 4 pin
J2 Not Assigned
J3 1250-0118 Connector: BNC, female
L1 thru L4 nsr; part of probe assembly (see misc.)
L5, 6 428B-60K Assembly, choke
L7 9140-0049 Inductor: var, 16 mh
L8 9110-0025 Inductor: degaussing
Ml 1120-0116 Meter:
P1 1251-0090 Connector:
P2 8120-0050 Cable, power
Q1 1854-0039 Transistor: Si NPN 2N3053
Q2 1853-0016 Transistor: Si PNP 2N3638
Q3 1854-0003 Transistor:
R1 0687-6801 fxd, comp, 68 ohms ±10%, 1/2 W
R2 nsr; part of A3 assembly
R3 thru R10 nsr; part of A1, A2 assembly
R11 nsr; part of A3 assembly
R12 0727-0335 fxd, dep c, 10 ohms +10%, 1/2 W
R13 0757-0002 fxd, mfg, 24.3 ohms ±1% 1/2 W
R14 0727-0035 fxd, dep c, 68.4 ohms ±1/2%, 1/2 W
R15 0727-0060 fxd, dep c, 225 ohms ±1%, 1/2 W
R16 0727-0085 fxd, dep c, 680 ohms ±1%, 1/2 W
R17 0727-0120 fxd, dep c, 2250 ohms ±1%, 1/2 W
R18 0727-0145 fxd, dep c, 6960 ohms ±1%, 1/2 W
R19 0727-0178 fxd, dep c, 24.7K ohms ±1%, 1/2 W
indicating, #12, 2 pin base
1 amp, s-b ( F1 115 V operation)
1/2 amp, s -b (F1 230 V operation)
1/2 amp
0-5 ma, 6 -10 ohms
male, 4 pin
2N1564