earbud amp to build

 I am going to try my hand at constructing again. I am regaining my hand eye coordination. This is one I thought about trying  long time ago. The 2SK2539 is a good njfet to work with BUT it is surface mount so will require a mounting surface?

This is a min part count (variety). All the stages using the same parts except R9 of the output stage. It has to be set to bias the transistor.

I put t here so I will not misplace it. Hope to start the build soon.

 

2SK2539 SPICE MODEL

 .MODEL 2SK2529 NJF(VTO=-3.1621 BETA=5.01519m BETATCE=-0.5 LAMBDA=2.40112E-2 RD=1.48485 RS=1.48485 CGS=1.05000E-11 CGD=1.40000E-11 PB=5.68050E-1 IS=9.11151E-16 XTI=3 AF=1 FC=0.5 N=1 NR=2 MFG=PHILIPS)