One of the stations here in Greenville had rather old Kleigal equipment-no dimmers-and the modern Kleigal setup I saw was in a TV statioon in Wash DC-this was in the late 70's though-sure they have changed it out by now-the station has also replaced their transmitters since then.Nowadays stations replace equipment more frequently than before-it used to be that major station items were going to be used for at least 20-40yrs-now it lucky to be used for 10 yrs.