[QUOTE"heat the CRT's"?? Are you saying these are always in some kind of standby mode?? ][/quote]
Yes, most CRT 's since the early 70's had a heater circuit to keep them heated which allowed a faster turn on time.
Sets before that could take up to 5 minutes to show a picture.
No, I'm not really that old,,,,people just still brought those in for repair when I started as a tech.