1. chaithanyatkm

    Thread Starter New Member

    Aug 26, 2011
    23
    0
    what does OA in OA79 stands for?
     
  2. sceadwian

    New Member

    Jun 1, 2009
    499
    37
    From what I can find it's an extremely old notation for vacuum tubes, the 0 means the filamnet is zero volts (diodes have no filament) and the A means it's a single diode.
     
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