MIL-PRF-1/866F
Dimensions
Ltr
Inches
Millimeters
Min
Min
Max
Max
Qualification inspection
Base: B6-63
N
Contact Cap J1-21
X
Conformance inspection, part 2
7.062
7.312
179.37
185.72
A
See note 1
B
1.375
1.500
34.93
38.10
C
13.000
13.500
330.20
342.90
D
7.312
185.72
E
---
---
5.750
6.125
146.05
155.58
F
3.938
4.438
100.03
112.73
G
M
10°
10°
Reference dimensions (see note 2)
H
2.219
56.36
NOTES:
24.00 R
609.60 R
J
1. The minimum useful screen radius shall be not less than
3 inches (76.2 mm).
.375 R
9.53 R
K
2.
Reference dimensions are for information only and are not
L
.750
19.05
required for inspection purposes.
P
50°
50°
3.
The bulb shall be a J57-1/2C or J57-1/2D type.
4.
Do not handle tube by the part of the bulb having the anticorona coating.
5. Dimension C applies to the entire length of the neck below the reference line. The reference line is determined by the
point where a gauge 1.500 ± .003 inches (38.10 ± 0.08 mm) inside diameter and 2 inches (50.8 mm) in length will stop
against the bulb body.
FIGURE 1. Outline drawing of electron tube types 7ABP7A and 7ABP19A.
5
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