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HP 450A Operating And Servicing Manual page 19

Hp 450a amplifier serials prefixed: 010
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Model 450A
Section V
Circuit
Description
Mfr.
*
<Fp
TQ
RS
Ref.
Stock No.
R17
Same as R1
R18
Resistor: fixed, composition,
01121
0693-1031
2
1
10,000 ohms ±10%, 2 W
R19
Resistor: fixed, composition,
01121
0690-5631
1
1
56,000 ohms ±10%, 1 W
R20
Not assigned
R21
Resistor: fixed, wirewound,
35434
0816-0003
1
1
500 ohms ±10%, 10 W
R22
Resistor: fixed, composition,
01121
0690-5641
1
1
560,000 ohms ± 10%, 1 W
R23
Same as R18
R24
Resistor: fixed, composition,
01121
0690-3331
1
1
33,000 ohms ±10%, 1 W
R25
Resistor: Optimum value selected at
factory.
R26
Resistor: fixed, composition,
01121
0690-8231
1
1
82,000 ohms ±10%, 1 W
R27
Resistor: variable, wirewound,
28480
M-77
1
1
)
linear taper, 10 ohms
R28
Resistor: fixed, composition,
01121
0687-6811
1
1
680 ohms ± 10%, 1/2 W
R29
Resistor: fixed, composition,
01121
0690-1511
1
1
150 ohms ±10%, 1 W
Sl,2
Switch, toggle
04009
3101-0001
2
1
T1
Transformer, power
28480
9100-0016
1
1
.
V1, 2, 3
Tube, electron: 5654
86684
1923-0001
3
3
V4
Tube, electron: 5Y3GT
86684
1930-0010
1
1
V5
Tube, electron: 6AU5GT
33173
1923-0020
1
1
V6
Tube, electron: 6AV6
82219
1939-0001
1
1
V7
Tube, electron: OA2
97966
1940-0004
1
1
)
*
Refer to
II
List of Manufacturers"
TQ
Total Quantity used in the instrument.
RS Recommended spares for one year
isolated service for one instrument.
Figure 5-1. Replaceable Parts (Sheet 3 of 4)
00001-1
5-3

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