Scott seems to think that this was previously the KVOA AM (1290, now KCUB) tower. I can't find any source to corroborate this, although we do know that 1290 has always been non-directional, and Scott is usually right about these things, so I can't dismiss it out of hand.
Copyright 2009, Garrett Wollman. All rights reserved. Photograph taken 2009-04-17.