At 20mA, that's about 120 Ohms. The current gain depends on the collector current, but figure on 50. With a base current of 20mA, that's a collector current of way more than the 2N3904 can handle, so 20mA will saturate it thoroughly. You can probably get by with a lower base current. Look at a 2N3904 datasheet for gain at different collector ...
Feb 19, 2008 · To match an 8 ohm speaker without using parallelled output devices (since you are not allowed to use higher rated ones) you could use a transformer - these were often used in cheap transistor radios with a push-pull output stage though you could also use a single-ended output stage. 2N3904 Signal Transistor. Catalog №: 2762016. $2.00 Sold-out Online. Request notification Find a store. Tweet. Maximum Power Dissipation: 350 mW. Maximum Collector ... 2N3904 Datasheet, 2N3904 PDF, 2N3904 Data sheet, 2N3904 manual, 2N3904 pdf, 2N3904, datenblatt, Electronics 2N3904, alldatasheet, free, datasheet, Datasheets, data ...
2N2222 datasheet, 2N2222 pdf, 2N2222 data sheet, datasheet, data sheet, pdf 2N3904 NPN General Purpose Amplifier . This device is designed as a general purpose amplifier and switch. The useful dynamic range extends as a switch and to 100 MHz as an amplifier..
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View similar products to the 2N3904 Transistor in the Transistors product category. Top of Page. Reviews. ... Part # 2N3904. Your Price $0.36 (2 Reviews) Details. 2N3904, 2N3904 Datasheet, 2N3904 NPN General Purpose Transistor Datasheet, buy 2N3904 Transistor 2N3904 2N3904 TO-92 / Bulk 2N3904-AP 2N3904 TO-92 / Ammopack TO-92 Bulk TO-92 Ammopack 1/5 DATA SHEET Product speciﬁcation Supersedes data of 1999 Apr 23 2004 Oct 28 DISCRETE SEMICONDUCTORS 2N5550; 2N5551 NPN high-voltage transistors book, halfpage
NPN General Purpose Amplifier(continued)Typical Characteristics (continued)Storage Time vs Collector Current110100510100 datasheet search, datasheets, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes and other semiconductors. The 2N3904 is a common NPN bipolar junction transistor used for general-purpose low-power amplifying or switching applications.    It is designed for low current and power , medium voltage , and can operate at moderately high speeds. 2N3904 / MMBT3904 / PZT3904 Rev. 1.1.0 October 2014 2N3904 / MMBT3904 / PZT3904 NPN General-Purpose Amplifier Ordering Information Part Number Marking Package Packing Method Pack Quantity 2N3904BU 2N3904 TO-92 3L Bulk 10000 2N3904TA 2N3904 TO-92 3L Ammo 2000 2N3904TAR 2N3904 TO-92 3L Ammo 2000 2N3904TF 2N3904 TO-92 3L Tape and Reel 2000 View similar products to the 2N3904 Transistor in the Transistors product category. Top of Page. Reviews. ... Part # 2N3904. Your Price $0.36 (2 Reviews) Details.
The 2N3904 is a common NPN bipolar junction transistor used for general-purpose low-power amplifying or switching applications.    It is designed for low current and power , medium voltage , and can operate at moderately high speeds.