Some  reports indicate that total time on the temporary longwire antenna approached
a year, and with several rebuilds of the long wire, they finally achieved 50 kw into it. 
City permit requirements delayed completion of a backup tower such that the
"temporary" tower topped out just a couple of weeks ahead of the new main tower.
(Thanks, Marv Collins, Bart Bartlett, and Larry Wichman for photo information.)


(Click to Enlarge)

A note on the back of the photo above states that the power was 7-1/2 KW  during
 the 1-1/2 months before a new tower, the first of two, was erected.  The short pole
 to the right of the building and between the two tall poles is still there.