Only hear a buzzing sound...
Posted 11 June 2009 - 07:17 AM
Posted 17 July 2009 - 12:56 AM
The 2N3904 is a "low power" NPN transistor while the 2N3906 is a low power PNP transistor. Basically, these two are not interchangeable because of their junctions. They are opposite polarity and when you put the 2N3906 in place, it probably shorted VCC (or drive circuit) to ground... thus the pop. The NTE382 is a higher power NPN transistor so using the 2N3904 (NPN) wouldn't have fixed your problem either
I know nothing about your radio, but given the NTE382 is an audio transistor, it's probably in some kind of push-pull configuration. I may be wrong. Do you have a schematic of the radio handy? In your research, did you run across a schematic someone posted somewhere?
Edited by makai, 17 July 2009 - 01:59 AM.
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