This Collins transmitter is KLAC's backup. Collins made two transmitters of this design, the 5-kW 820E-1 and the 10-kW 820F-1. Both models used the same front-panel trim, which is marked “820E/F-1”, so it's impossible to tell which one this is without a close look at the builder's plate.
Copyright 2006, Garrett Wollman. All rights reserved. Photograph taken 2006-04-21.