MIL-PRF-1/776F
Dimensions
Ltr
Inches
Millimeters
Min
Max
Min
Max
Conformance inspection, part 2
A
5.188
5.688
131.78
144.48
B
---
2.812
---
71.42
Conformance inspection (periodic check) part 3
(see note 1)
C
.328
---
8.33
---
D
.350
.365
8.89
9.27
E
A5-97 (EIA)
NOTES:
1. This test shall be performed during the initial production and once each succeeding 12-calendar months in which
there is production. An accept on zero defect sampling plan shall be used, with sample of three tubes with an
acceptance number of zero defects. In the event of failure, the test will be made as a part of conformance
inspection, part 2, acceptance level 6.5 (see 6/). The regular "12-calendar month" sampling plan shall be reinstated
after three consecutive samples have been accepted.
2. Does not include increase due to solder.
FIGURE 1. Outline drawing of electron tube type 4D21.
5
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