MS90546B
TABLE II. Electrical characteristics (final).
Inspection group |
Allowable variation from Initial measurement |
Allowable percent from specified minimum value in electrical characteristics (initial) table |
||
Inductance (percent) |
DC resistance |
Self-resonant frequency |
Q |
|
Qualification inspection Group II Group III Group IV |
±2 ±5 ±3 |
--- ±(2% +.001 ohm) ±(2% +.001 ohm) |
--- -5 -5 |
-10 -15 -10 |
Conformance inspection group C Subgroup I Subgroup II Subgroup III |
±2 ±3 ±5 |
--- ±(2% +.001 ohm) ±(2% +.001 ohm) |
--- -5 -5 |
-10 -10 -10 |
Application notes:
1. Core shall be set at the maximum specified inductance value indicated in the electrical characteristics (initial) table prior to all inspection tests. This core setting shall not be changed until electrical characteristics (final) measurements are performed.
2. Temperature rise and terminal pull tests are applicable.
3. Barometric pressure (test condition C) is applicable.
4. Operating torque shall be maximum of 6 ounce-inches and a minimum of 0.5 ounce-inch for tuning coil.
5. The test fixture in the diagram below shall be used for electrical measurements. The effective inductance shall be determined for all coils whenever this measurement is specified. Allowance of approximately .03 µH shall be determined for internal inductance of the Q-meter and test fixture when measuring inductance
values of 10 µH or less. The shorting bar shall be made of solid copper wire (AWG #20) bent to conform to the body configuration of the coil under test (see diagram above).
5
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