That's good to know. There are quite a few 66's and 68's out there with good RF sections but a crapped out display section. Looks like new life for a classic!
About a year ago I repaired a couple broken HP8566B spectrum analyzers at work. I really wanted to take one home but my boss is no fool. A couple months ago we lent one to a couple guys who pinched a 115 VAC lead with a current probe and blew the low frequency front end and managed to mess up the display. We were very unhappy because this unit had a good CRT. Well they owned up to hurting our equipment and offered to pay for the repair.
We sent it to Tucker where they installed a cool modification, a new multicolor LCD display. They replaced the blown front end and returned the good CRT to go in of our very dim unit.
The HP8566B is one of the best spectrum analyzers known to man and this upgrade makes it as good as new. My boss and I were like two kids under the Christmas tree playing with it this morning. I think the modification was just over $2K including a fresh calibration sticker. Well worth the price for this classic. Didn't make it any lighter....