MIL-STD-981C
Table XIII. Group B tests for RF transformers (families 11 and 12) (see 5.6.7.4).
Test 1/ |
Class S |
|
Sample Size |
Defective units allowed |
|
Subgroup 1 Resistance to soldering heat Terminal strength Operating torque (when applicable) Temperature rise Dielectric withstanding voltage (2 x working voltage) 2/ Electrical characteristics Vibration, winding continuity Visual and mechanical examination (external) Visual and mechanical examination (internal) *(one sample unit) 6/ |
2 |
0 |
Subgroup 2 Solderability Resistance to solvents Life 3/ Induced voltage Dielectric withstanding voltage (at reduced voltage) Insulation resistance 4/ Electrical characteristics (final) Visual and mechanical examination (external) Visual and mechanical examination (internal) *(one sample unit) 6/ |
2 |
0 |
Subgroup 3 Corona discharge 5/ |
2 |
0 |
1/ Specified tests shall be performed in accordance with MIL-T-55631.
2/ At maximum temperature for the class.
3/ Raise temperature one class, for 500 hours.
4/ Full voltage with insulation resistance (IR) of 1.5 times the specified value.
5/ Applicable when material is stressed greater than 100 volts/mil due to maximum operating
Voltage. Subject one sample each from subgroups 1 and 2 to this test.
6/ Real time x-ray is an acceptable method of examination in lieu of dissection or disassembly.
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