Polarity - NPN.
eBay
eBay
eBay
Marshall style gold knob. Viewed from the underside with the flat to the bottom, the pinout is left pin Collector, middle pin Base, right pin Emitter.
eBay
eBay
eBay
2N3904 Bipolar (BJT) Silicon General Purpose Transistor, NPN, - Pack of 10. Condition is New. Dispatched with Royal Mail 2nd Class Large Letter.
eBay
It is suitable for use with general purpose switching and amplification. Bipolar (BJT) Single Transistor, NPN, 45 V, 100 mA, 250 mW, SOT-23, Surface Mount. Transistor Type NPN. Maximum DC Collector Current 100 mA.
eBay