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Choose Devices: Device: Type: (All Types) Diode Valve Triode Valve Tetrode Valve Pentode Valve Hexode Valve Heptode Valve Octode Valve Nonode Valve Tuning Eye Valve Metal Rectifier Diode (pn) PNP Transistor NPN Transisitor Barretter Base: (All Bases) B4 B7 B7G B8A B8G B9A Edison Screw GT3 International Octal Mazda Octal TO1