12A01M
Low-Frequency General-Purpose Amplifier Applications (Sanyo Semicon Device)
12A01SP
Low-Frequency General-Purpose Amplifier Applications (Sanyo Semicon Device)
12A02CH
Low-Frequency General-Purpose Amplifier Applications (Sanyo Semicon Device)
12A02SP
Low-Frequency General-Purpose Amplifier Applications (Sanyo Semicon Device)
12A02SS
Low-Frequency General-Purpose Amplifier Applications (Sanyo Semicon Device)
12AB5
Beam Power Tube (RCA)
12AE10
Beam Power Tube (RCA)
12AL5
Twin Diode (GE)
12AT6
Double Diode Triode (General Electric)
12AT7
Double Triode (Ei-RC)