MIL-PRF-1/1392D
TABLE I. Testing and inspection - Continued.
Inspection
Inspection
Method
Type
Conditions
Acceptance
level
Symbol
Limits
Unit
level
or code
Min
Max
Conformance inspection,
part 2 - Continued
Grid cutoff voltage
5241
All
---
---
Ec1
-25
-70
V dc
µA dc
Grid No. 1 leakage
5251
All
---
---
Ic1
---
3
current
Aperture alignment
---
All
6/
---
---
Distance
---
5
mm
Secureness of base,
1101
All
---
---
---
---
---
---
cap, or insert
Heater or filament
1301
All
---
---
If
540
660
mA
current
Side terminal and
5101
All
---
---
---
---
---
---
base alignment
Eb = 8,800 V dc
Stray light emission
5216
All
---
---
---
---
---
---
Ec2 = 330 V dc
(conventional type)
P14A
P7A
Ec2 = 770 V dc
P25
Ec2 = 770 V dc
Screens
5221
All
---
---
---
---
---
---
P7A Ib = 200 µA dc
mm
0.50
---
Width
---
---
Line width "A"
5226
P14A Ib = 200 µA dc
mm
0.25
---
Width
---
---
(magnetic deflection)
P25 Ib = 25 µA dc
mm
0.20
---
Width
---
---
P7A Ib = 200 µA dc
Line width "C"
5226
---
---
Width
---
0.60
mm
P14A Ib = 200 µA dc
(magnetic deflection)
---
---
Width
---
0.35
mm
P25 Ib = 25 µA dc
---
---
Width
---
0.30
mm
Ib = 200 µA dc;
Focusing ampere turns
5246
All
---
---
---
369
495
---
D = 2.75 inch
Heater-cathode leakage
5251
All
---
---
---
---
---
---
current
Grid No. 2 leakage
5251
All
---
---
---
---
---
---
current
Permanence of marking
1105
All
---
---
---
---
---
---
See footnotes at end of table.
3
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