{HEAD ~ The emitters} of transistors Q5 and {TAIL ~ Q6} are coupled to the emitter series feedback resistors R1 and R2, respectively 
{ HEAD ~ The emitters } of transistors Q5 and { TAIL ~ Q6 } are coupled to the emitter series feedback resistors R1 and R2 , respectively
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH