kookookachu

Hi everyone, this is my first post on this forum. First, I want to thank all the members on this forum, it's been very helpful to me! I am looking for equivalent to BF494 or BF495 transistor...because I cannot find them where I am. Does anyone know equivalent transistors? And what is the difference between the two? NPN and PNP? Also, this could be very useful to me and many people, how do you go about finding equivalent or close to equivalent transistor? You look at the maximum voltages for for the base collector and emitter, but what about the frequencies etc...can someone help on that? It would facilitate my researchs greatly! :) Thank you all very much!