The output of the transformer is rectified by {HEAD ~ a diode} and then filtered by {TAIL ~ a large capacitor} 
The output of the transformer is rectified by { HEAD ~ a diode } and then filtered by { TAIL ~ a large capacitor }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL