12AT6
Double Diode Triode (General Electric)
12AT7
Receiving Valve (BRIMAR)
12AT7
Beam Power Tube (RCA)
12AT7
Double Triode (MAZDABELVU)
12AT7
Compactron Tube (Shuguang)
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)