MIL-PRF-1/263G
TABLE I. Testing and Inspection. -Continued.
MIL-STD-
Limits
1311
Unit
Requirement or test
Conditions
Symbol
Min
Max
method
Conformance inspection,
part 3
Heater-cycling life
1506
Ef = 7.5 V;
---
---
---
---
Ehk = 100 V dc;
Epp/a = 0;
Rl = CL = 0
(1 minute "on",
4 minutes "off")
---
Heater-cycling life-test
end point:
μA dc
1336
Heater-cathode leakage
Ihk
---
150
1501
Intermittent life
TA = room
---
---
---
---
See note 8
TE = 165°C (min)
(see notes 9 and 10)
---
Intermittent life-test
See note 11
end points (500 hours):
ΔIo
1353
Change in operation of
---
8.5
%
rectifiers of individual tubes
t
1301
Heater current
If
550
660
mA
μA dc
1336
Heater-cathode leakage
Ihk
---
90
---
Intermittent life-test
See note 11
end points (1,000 hours):
ΔIo
1353
Change in operation of
---
11.5
%
rectifiers of individual tubes
t
1301
Heater current
If
550
666
mA
μA dc
1336
Heater-cathode leakage
Ihk
---
90
NOTES:
1. To simplify the application of the maximum ratings to circuit design, the absolute-maximum ratings are presented in chart form
as rating charts I, II, III, and IV. Operating points should be so selected that the boundary limits on rating charts, I, II, III, and
IV are not exceeded with a bogey tube under the worst probable operating conditions with respect to supply-voltage variation,
equipment component variation, equipment control adjustment, and environmental conditions.
A brief description of each of the rating charts is given below. The values of ac supply voltage as presented refer to the
unloaded supply voltages per anode.
Rating chart I (see figure 1). This chart presents the maximum ratings for ac anode supply voltage and dc output
a.
current. The boundary FAEDG defines the limits for capacitor-input filter operation and the boundary FABCDG
defines the limits for choke-input filter operation.
Rating chart II (see figure 2). This chart provides a convenient method for checking conformance with the maximum
b.
steady-state peak-anode-current rating. Rating chart II applies to capacitor-input filter operation only.
3
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