what does OA in OA79 stands for?
C Thread Starter chaithanyatkm Joined Aug 26, 2011 23 Sep 17, 2012 #1 what does OA in OA79 stands for?
S sceadwian Joined Jun 1, 2009 499 Sep 17, 2012 #2 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.
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.
