150 - CRYSTAL GRINDER, RADIO

150 - CRYSTAL GRINDER, RADIO

Grinds, finishes, and calibrates quartz used in crystal-controlled radio sets. 

Must be thoroughly familiar with all types of crystal cuts and their characteristics. Must know the type of holder to be used, the required crystal activity and tolerances, and the type of testing unit to be used in calibrating crystals for any particular set.

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