MIL-PRF-1/1383D
Dimensions
Ltr
Inches
Millimeters
Ltr
Inches
Millimeters
Min
Max
Min
Max
Min
Max
Min
Max
2°
4.5°
2°
4.5°
A
8.31
8.93
211.07
226.82
W
B
2.63
2.75
66.80
69.85
X
6.19
6.31
157.23
160.27
C
2.77
2.95
70.36
74.93
Y
---
.68
---
17.27
43°
47°
43°
47°
D
5.68
6.18
144.27
156.97
Z
88°
92°
88°
92°
E
1.83
1.93
46.48
49.02
AA
F
1.42
---
36.07
---
AB
.25
---
6.35
---
G
---
8.75
---
222.25
AC
2.09
2.15
53.09
54.61
46°
52°
46°
52°
H
7.84
7.88
199.14
200.15
AD
J
3.20 R
3.37 R
81.28 R
85.60 R
AE
---
4.06
---
103.12
K
---
.59
---
14.99
AF
1.38
1.50
35.05
38.10
L
.13
---
3.30
---
AG
---
2.00
---
50.80
M
1.00
1.18
25.40
29.97
AH
.38
---
9.65
---
P
1.22
1.28
30.99
32.51
AJ
4.95
---
125.73
---
R
.59
.69
14.99
17.53
AK
.56
.63
14.22
16.00
S
3.735
3.765
94.87
95.63
AL
---
.28
---
7.11
T
.97
1.12
24.64
28.45
AM
.09
---
2.29
---
U
.83
.95
21.08
24.13
AN
2.65
---
67.31
---
V
---
11.25
---
285.75
AP
---
1.90
---
48.26
Reference dimension
AR
.52
.60
13.21
15.24
N
---
6.00
---
152.40
NOTES:
1. Terminal has 1 inch (25.4 mm) - 16 unified thread class 2A fit, .38 inch (9.65 mm) long, and 2 holes .258 -.270 inch
(6.55 - 6.86 mm) diameter spaced .438 inch (11.13 mm) on centers.
2. The holes in the filament, grid No. 1 and grid No. 2 coolant terminal connections will accept the pins of the plug-and-
cylinder combination gauge shown in gauge G1 (see figure 5.)
3. Terminal has 1.75 inch (44.45 mm) -16 unified extra fine thread, class 2a fit, .38 inch (9.65 mm) long, 2 holes .508 - .522
inch (12.90 - 13.26 mm) diameter spaced .688 inch (17.48 mm) on centers and index hole .160 inch (4.06 mm)
maximum diameter spaced .344 inch (8.74 mm) from the center of the terminal.
4. The holes in the anode coolant connection will accept the pins of the plug-and-cylinder combination gauge shown in
gauge G2 (see figure 6).
5. Pressure from circuit contacts shall be exerted only over maximum length, AH, of designated contact areas of the anode
or gird No. 1 terminals.
6. This diameter dimension is held only over a length of AH.
7. Dimension L applies over length AB as indicated.
8. The contact surfaces, BA - BA' and BB - BB' of the rf cathode terminals shall be parallel within .06 inch (1.52 mm).
9. Contact of the input and rf cathode terminal shall not be made at a diameter smaller than 4.06 inch (103.12 mm) nor
greater than 4.95 inch (125.73 mm).
10. To prevent excessive stress on the ceramic seal, a .9375 inch (23.813 mm) open-end wrench shall be used to permit
gripping the terminal when removing or tightening the coolant connectors.
11. Contact of the output-end rf cathode terminal shall not be made at a diameter smaller than 6.000 inches (152.40 mm).
The pressure exerted for this rf contact shall be limited to that necessary for good electrical contact. The mechanical
force for the cavity support and pressure seal shall be made at a diameter not less than 6.000 inches (152.40 mm). On
this output-end rf cathode terminal, there are four equally spaced .188 inch (4.78 mm) diameter holes on a circle having
a diameter of 6.75 inches (171.45 mm). These holes are for tube manufacturing purposes only. Attention is called to the
existence of these holes so that equipment designers can avoid making a pressure seal or electrical contact at points
which are coincident with these holes. Mechanical clamping devices for the output cavity shall be designed so as to
exert their clamping force across outer edge of output header flange.
12. Serial number shall be located on this surface between DC grid No. 2 and adjacent coolant heater tubing.
13. Corners may be rounded or chamfered not to exceed .05 inch (1.27 mm).
14. This annular-volume region shall be kept clear. Circuit components (conductors or insulators) shall not be allowed to
protrude into this region which is defined by 5.00 inches (127.0 mm) diameter.
15. This edge is chamfered not to exceed .03 inch (0.76 mm).
FIGURE 1. Outline drawing of electron tube type 2041 - Continued.
9
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