FP-Empathy

Part Value    
C1   100n     
C2   100n     
GAIN 250KB    
Q1   2N5088 or similar
R1   2M       
R2   4K7      
R3   1M       
VOL  250KA    

D1-2, D3-4 were added as optional clipping mods. Try what you like.
Wire S1-3 to a SPDT ON-OFF-ON toggle if using these.

This circuit is notoriously finicky about the transistor. Some will sound great. Some will suck. Noone has pinned down the exact parameters of what it requires.