MIL-PRF-1/262H
TABLE I. Requirements and tests - Continued.
Limits
MIL-STD-1311
Requirement or test
Notes
Conditions
Symbol
Unit
Min
Max
Method
Conformance
inspection, part 3
1506
Ef = 7.5 V;
---
---
---
---
Heater-cycling life
Ehk = +100 V dc;
Epp/a = 0;
1 min "on",
4 min "off"
---
Heater-cycling life-test
end point:
µA dc
1336
Ehk = 450 V dc
Ihk
---
150
Heater-cathode leakage
1501
4, 7-8
TA = room;
---
---
---
Intermittent life
---
TE = +180°C (min);
Ehk = Eo
---
Intermittent life-test
end points (500 hours):
ĆIo
1353
---
8.5
Change in operation of
%
rectifiers of individual
t
tubes
1301
830
984
Heater current
mA
If
µA dc
1336
---
75
Heater-cathode leakage
Ihk
---
Intermittent life-test
end points (1,000 hours):
ĆIo
1353
---
11.5
Change in operation of
%
rectifiers of individual
t
tubes
1301
830
993
Heater current
mA
If
µA dc
1336
---
75
Heater-cathode leakage
Ihk
NOTES:
1.
To simplify the application of the maximum rating to circuit design, absolute 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 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.
(a)
Rating chart I. This chart presents the maximum ratings for ac anode supply voltage and dc output current. The
boundary FAEDG defines the limits for capacitor-input filter operation, and the boundary FABCDG defines the limits
for choke-input filter operation.
(b)
Rating chart II. This chart provides a convenient method for checking conformance with the maximum steady-state
peak-anode current rating. Rating chart II applies to capacitor-input filter operation only.
3
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business