2000, Issue 37, Category: Communication World
Q: "Electronic News" "Cordless Telephone Extension" and other articles described that after replacing the C1971 in the main unit with the transmitting transistor C2539, you can get greater output power, but the actual arrangement of the two components does not have a pin arrangement Similarly, can you introduce the pin functions of these two components?
Answer: The arrangement of C1791 and C2539 is shown in the figure, the middle leg of C1971 is the emitter, the left is the base, and the right is the collector (subject to the side marked with text), which is completely arranged with the pins of ordinary triode Different, so you can identify counterfeit products on the market, and the arrangement of C2539 is special, the four pins around and the heat sink are ground pins (emitter), the middle two pins are the base and collector ( Relatively speaking, the collector pin is wider than the base pin). Chengdu Li Bo
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Published on 2006-04-15 20:46 • 202 times read
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