• In a mechanical component, such as a dial, looseness or play within which the desired effect is not yet achieved. For instance, the initial movement of a tuner control mechanism that doesn't yet effect a change in frequency.
  • The discrepancy in the indicated and/or actual values of a quantity when the dial controlling them is turned clockwise versus counterclockwise.
  • In a thermionic tube, incomplete rectification due to positive ions in its gaseous atmosphere.

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