2N3904 or 2N2222 might do you but a 2N3707 is identical to a BF494.
You can get the datasheets here:
You can get the datasheets and the parts for less than Radio Shack here:
Mouser has a great search filter that enables you to put the parameters of a component in and it will tell you all the parts that fit.
Select as Best AnswerUndo Best Answer
Same question as here....Similar circuit, I assume same school?