MIL-PRF-1/61D
TABLE I. Testing and inspection.
Limits
MIL-STD-
Acceptance
Unit
1311
Requirement or test
Conditions
level
Symbol
method
(see note 5)
Min
Max
Conformance
inspection, part I
µA dc
Total grid current
1266
Test condition (1)
0.65
Ic1
0
-1.0
(see note 2)
Electrode current (1)
1256
Test condition (1)
0.65
Ib
6.5
12.0
mA dc
(anode)
µmhos
Transconductance (1)
1306
Test condition (1)
0.65
Sm
1,600
2,400
Emission
1231
Eb = Ec1 = Ec2 = Ec3
0.65
Is
65
---
mA dc
= 30 V dc (see note 2)
Short and discontinuity
1201
0.4
---
---
---
---
detection
Conformance
inspection, part 2
mV ac
Low-frequency vibration
1031
Test condition (1);
---
Ep
---
100
Rp = 2,000 ohms
mA
Heater current
1301
---
If
138
162
µA dc
Heater-cathode leakage
1336
---
Ihk
---
20
Electrode current (2)
1256
Test condition (2)
---
Ib
1.3
2.6
mA dc
(anode)
Electrode current (1)
1256
Test condition (1)
---
Ic2
1.6
3.4
mA dc
(screen)
Electrode current (2)
1256
Test condition (2)
---
Ic2
0.35
1.0
mA dc
(screen)
µmhos
Transconductance (2)
1306
Test condition (1);
---
Sm
1
30
Ec1 = -35 V dc
µmhos
Transconductance (3)
1306
Test condition (2);
---
Sm
950
1,450
Esig = 0.05 V (see note 3)
Direct-interelectrode
1331
Without shield
---
Cg1p
---
0.0035
pF
6.2
capacitance
Without shield
Cin
3.8
pF
8.8
Without shield
Cout
5.2
pF
---
Secureness of base,
1101
---
---
---
---
cap, or insert
---
Insulation of electrodes
1211
---
---
---
---
---
Permanence of marking
1105
---
---
---
---
Conformance
inspection, part 3
Life-test provisions
Group A; Ehk = 100 V
---
---
---
---
---
---
µmhos
Life-test end point
Transconductance (1)
---
---
Sm
1,300
---
(500 hours)
See notes at top of next page.
2
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