{HEAD ~ An electrical connection} is provided to {TAIL ~ opposite ends} of the cathode through two or more low resistance resistors with high temperature coefficients of resistance 
is provided to
{ HEAD ~ An electrical connection } is provided to { TAIL ~ opposite ends } of the cathode through two or more low resistance resistors with high temperature coefficients of resistance
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH