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