MIL-PRF-1/1756B
NOTES:
1. Insulation material between heater and heater-cathode shall be securely affixed.
2. Dimensions in electrode contact area table are for socket design purposes and are not intended for inspection purposes.
3. Silver plated 30 MSI minimum.
4. Plating not required over radiator and radiator support of copper, aluminum, or approved equivalent.
5. This surface shall be used for measurement of anode shank temperature.
6. Holes for tube extractor through top fin only.
7. Inner edge of heater and outer edge of cathode rf connection shall be free from burrs and sharp edges.
8. This fin shall withstand a 6-inch (152.40 mm) drop test without loosening and without distortion as judged by ability to
maintain dimension K.
9. Distortion of fins permissible provided distance between adjacent fins at any point on circumference meets tolerances for
dimension K.
10. Eccentricity of contact surfaces shall be gaged from center line of reference shall be as follows:
TIR maximum
Reference
Contact surface
Anode
0.020
Cathode
Grid
0.020
Cathode
Heater
0.012
Cathode
11. Diameters N, R, T, and U shall apply throughout entire contact areas as defined by dimensions AA, AB, AC, and AD
respectively.
12. This surface shall not be used for clamping or locating.
FIGURE 1. Outline drawing of electron tube type 8964 - Continued.
Custodians:
Preparing activity:
Navy - EC
DLA - CC
Review Activities:
(Project 5960-3594)
Navy - AS, CG, OS, SH
8
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