MIL-PRF-1/66C
TABLE I. Testing and inspection - Continued.
Inspection
Method
Notes
Conditions
Symbol
Limits
Limits
Unit
Min
Max
Conformance inspection,
part 2
Heater current
1301
---
If
540
660
mA
Electrode current
5201
---
Ec1 = 0
Ic2
---
50
A dc
(grid No. 2)
Side terminal and base
5101
---
Pin No. 5
---
---
---
---
alignment
Stray light emission
5216
---
Eb = 8,800 V dc;
---
---
---
---
(conventional types)
Ec2 = 770 V dc
Screens
5221
---
---
---
---
---
Line width A
5226
---
Width
---
0.65
Ib = 200 A dc
mm
Line width C
5226
---
Width
---
0.75
mm
Ib = 200 A dc
Focusing ampere turns
5246
---
AT
337
459
---
Ib = 200 A dc
D = 2.75 inches
Heater-cathode leakage
5251
---
---
---
---
---
current
Grid No. 2 leakage current
5251
---
---
---
---
---
Secureness of base, cap
1101
---
---
---
---
---
or insert
Base pin solder depth
1111
---
---
---
---
---
Permanence of marking
1105
---
---
---
---
---
Conformance inspection,
part 3
---
---
---
---
Group C;
---
---
Life test
Eb = 8,800 V dc;
Ec2 = 770 V dc;
Ib = 60 A dc;
t = 500 hours
(minimum)
---
Life-test end points:
mm
0.75
Width
---
---
5226
Line width A
Ib = 200 A dc
mm
0.85
Width
---
---
5226
Line width C
Ib = 200 A dc
V dc
38
---
---
5223
Modulation
Ec1
Ib = 200 A dc
See notes at end of table.
3
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