Before describing {HEAD ~ a further development} of the invention illustrated in FIG 2, a suitable dual control electrode adjustable focus x ray tube for using {TAIL ~ the new self compensating biasing voltage supply} will be described in reference to FIG 3 
Before describing { HEAD ~ a further development } of the invention illustrated in FIG 2 , a suitable dual control electrode adjustable focus x ray tube for using { TAIL ~ the new self compensating biasing voltage supply } will be described in reference to FIG 3
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH