MIL-PRF-1-851 Electron Tube, Magnetron Type 5780

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MIL-PRF-1/851H

NOTES:

1. Reference plane A is defined as that plane which is coincident with the face of the mounting surface as shown.

2. Reference plane B is defined as that plane which is perpendicular to reference plane A, and which passes through centers of

mounting holes as shown.

3. Reference plane C is defined as that plane which is mutually perpendicular to reference planes A and B, and which passes

through centers of mounting holes as shown.

4. All metal parts except those designated "S" shall be painted with heat resistant, noncorrosive paint. Qualification inspection

shall apply.

5. Surfaces designated "S" shall be noncorrosive. This requirement shall apply also over full extent of maximum plug penetration.

6. Gear and worm threads of tuning mechanism shall be free from corrosion, paint, or other obstructions. All metal parts of

tuning mechanism except, worm, worm shaft, and striking pin shall be noncorrosive.

7. Output flange shall be M85/1-073-120 waveguide output flange modified as shown. Protective cover shall be provided with

tube and shall be kept in place when tube is not in use.

8. Insulator should be Silastic 65. Dimensions are 2.02 inches (51.31 mm) outside diameter by 1.075 inches (27.31 mm) inside

diameter by .50 inch (12.70 mm) thick before assembly with tube.

9. Surfaces designated "D" are for hermetic connections.

10. Tuning mechanism shall be set at midband frequency for shipment..

11. Counterclockwise rotation of tuning shaft, as viewed from direction of output flange, increases frequency. Complete frequency

range shall be covered in not more than 180, nor less than 150 turns of tuning shaft. Number which appears through hole in

geneva cover indicates revolutions from 0 to 6. Centerline of tuning shaft shall coincide with reference plane C within .045 inch

(1.14 mm).

12. A sleeve .195 inch (4.95 mm) inside diameter by .406 inch (10.31 mm) outside diameter by 1.0 inch (25.4 mm) long shall pass

over ends of tuning shaft to face of worm bracket. Conformance inspection, part 2, shall apply.

13. Axis of heater terminal shall occupy specified locations with .047 inch (1.19 mm) R. Note 17 shall apply.

14. Limits include angular and lateral deviations.

15. Heater terminal and cathode terminal shall be concentric within .010 inch (0.25 mm).

16. Dimension "BJ" defines the minimum length of diameter "BH".

17. With diameter "G" resting on a plane surface coincident with reference plane A, a gauge .010 inch (0.25 mm) thick and .125

inch (3.18 mm) wide shall not enter, and areas coincident with reference plane A beyond diameter "G" shall be flat within .010

inch (0.25 mm).

18. With diameter "W" resting on plane surface, a gauge .005 inch (0.13 mm) thick and .125 inch (3.18 mm) wide shall not enter.

19. Exhaust tubulation.

20. Diameter "CB" may be .178 inch (4.52 mm) minimum and .190 inch (4.83 mm) maximum for a distance of .062 inch (1.59

mm) beyond extremity of dimension "CD".

21. No clamping means shall bear beyond dimension "BP".

22. Mounting: Any position.

23. The acceptance level for the combined attributes in conformance inspection, part 1, shall be 1.0, inspection level II.

FIGURE 1. Outline drawing of electron tube type 5780 - Continued.