YOM: 2006
Ver. 2.6.2.22
Tube WILL be approx. 650K sec. / 205K counts (plus/minus when de-installed)
*Tube scan (as of Oct. 2020): 523K sec. / 163K counts
*System scan (as of Oct. 2020): 3.200K sec. / 1,220K counts
**The last tube replacement in May 2018
