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Radio Suppression Capacitor Open Or Short Test

  1. Adjust ohmmeter to x1000 scale. Place ohmmeter lead on one of rectifier "BAT" blade terminals and remaining lead on rectifier base plate. Reverse leads and repeat test. Note reading in both positions.
  2. Infinite reading should be obtained in one direction. This indicates reverse current direction through the diodes. Reading of approximately 1000 ohms should be obtained in the other direction. This indicates the forward current direction.
  3. Replace rectifier if same reading is obtained in both directions. Capacitor can be checked for shorts by placing leads to rectifier "BAT" terminal and base plate in the forward (1000 ohms) current direction.
  4. Observe ohmmeter indicator needle while reversing leads and again contacting them to rectifier "BAT" terminal and base plate. Indicator should jump slightly.
  5. This indicates that ohmmeter batteries are charging the capacitor. Indicator should then return to infinite reading. If indicator does not jump, capacitor is open. Replace rectifier assembly.
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