What is a comparable transistor to the bc 184b?

Question

I am building the metal detector at http://www.easytreasure.co.uk/bfo.htm and buying the parts at digikey but the transistor suggested isn't available in quantities I'd like to purchase. Could you suggest a comparable part?

I have plenty of experience in constructing circuits for physics labs but not enough knowledge to easily find the part on my own.

Thanks!

Answer 1

The NTE cross reference is the NTE123A, which is a pretty general purpose NPN transistor.  

The specs for the NTE123A read just like a 2N2222A.  You can get those anywhere.  

After studying the circuit... a 2N2222A will do, just fine.

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