MIL-PRF-1/849G
NOTES:
1. Gold, silver, or nickel plate over full extent of maximum plug penetration.
2.
Maximum projection of the tubulation shall not extend more than 0.125 inch (3.18 mm) beyond the centerline of the two
mounting holes on the side opposite the waveguide flange.
3.
Reference point for anode T measurements locate where a central fin meets the anode block near the output section.
4.
All metal surfaces shall be painted except those designated "S" and "D". Surfaces designated "S" shall be gold, silver, nickel,
or bright alloy plated, or brass surfaces except as specified.
5.
Hermetic connections may be made to surface "D".
6.
Axis of cathode terminal shall occupy specified location within 0.047 inch (1.19 mm) RAD. 7/ shall apply.
7.
Limits include angular and lateral deviations.
8.
With diameter "G" resting on a plane surface coincident with reference plane "A", a gage 0.010 inch (0.25 mm) thick and
0.125 inch (3.18 mm) wide shall not enter, and areas of the base plate outside diameter "G" shall be within 0.010 inch (0.25
mm) of the plane surface.
9.
With diameter "W" resting on a plane surface, a gage 0.005 inch (0.13 mm) thick and 0.125 inch (3.18 mm) wide shall not
enter.
10. Any portion of the assembly which extends below reference plane "A" shall be within 0.625 inch (15.88 mm) RAD of specified
axis of input.
11. Defines extremity of cylindrical section designated by 0.169 inch (4.29 mm) diameter.
12. Defines extremity of cylindrical section designated by 0.540 inch (13.72 mm) diameter.
13. Clamping shall be confined to this area.
14. Heater terminal and cathode terminal shall be concentric within 0.010 inch (0.25 mm).
15. Protective covers shall be provided with tube.
16. Reference planes "A", "B", and "C" are mutually perpendicular.
17. Gear and worm threads shall be free from corrosion, paint, and other imperfections. All tuner parts except worm, shaft, and
striking pin shall be nickel plated.
18. A sleeve .195 inch (4.95 mm) inside diameter by .406 inch (10.31 mm) outside diameter by 1.00 inch (25.40 mm) long must
pass over ends of shaft to face of worm bracket.
19. For vibration tests, axes of vibration shall be normal to reference planes "A", "B", and "C".
20. Reference point for cathode bushing temperature measurements. Locate on 1.000 inch (25.40 mm) diameter cathode
terminal.
FIGURE 1. Outline drawing of electron tube type 6543 - Continued.
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