Electret mic to line level amp

I want to record the output of a stethoscope. I plan on connecting an electret mic to the earpiece and amplifying the output to feed to a recorder. I have found a one transistor amp with 30 to 40 db gain, but I don't have a transistor with hfe as high as the design(bc549c). I'm looking for a two transistor design using 2n2222 or 2n4401. Most designs I see have an opamp after the transistors. I just want a simple circuit to raise the mic level to line. Thanks for your help Mike