{TAIL ~ Each diode} 162, 164 and 166 conducts in the forward direction and thereby establishes a clipping level at approximately +0.5 volts change in {HEAD ~ gate swing} to emulate distortion associated with grid conduction in a tube amplifier 
{ TAIL ~ Each diode } 162 , 164 and 166 conducts in the forward direction and thereby establishes a clipping level at approximately +0.5 volts change in { HEAD ~ gate swing } to emulate distortion associated with grid conduction in a tube amplifier
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH