transistor questions

[darklordchris]

could someone help me out a bit with equivalent transistors ?
I think that getting the right ones is one of the problems i've been having. is their a standard? how do i know whats what? are their going to be minor differences that are going to mess up my radio circuits?

also more importantly does anyone know if the NTE 2N4401 527 is equivalent to the bc548?

[Deleted]

Depends on the circuit, but by comparing the datasheets, not really.

The BC548 has a much higher hfe and 50MHz higher Ft than the 4401.

However, a 2SC945 is your best bet and they can be scavenged from pretty much everything

Peace!