Geeking out on HAM

Just watched the most recent episode, from a couple nights ago, of Last Man Standing.  Tim Allen's character is a HAM and has the call sign KA0XTT.  The "XTT" is a bit of a private joke as Tim's character name on "Home Improvement" was Tim Taylor. So, ex T. T.  Yuk, yuk. 

Info on how the producer, who has a HAM license, incorporated HAM radio into the show and got the call sign.

The QSL card that is sent out:

We've not been using our radios much and I'd really have to do a review of the band plan, for one thing, if we did.  But we do have our call signs as our auto license plates. 

KF6xxx Clear.