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The Broadcast Electronics FMi 703, when operating in pure HD mode, can make about 2.8 kW. In this case, because KTAR-FM and KPKX are high-level combined, they need all of that power—because 90% of it will be thrown away in the combiner. (The reject load is on the roof of the building.) There no obvious labeling of the two transmitters to show which one is which.
Copyright 2009, Garrett Wollman. All rights reserved. Photograph taken 2009-04-16.