I don't quite remember what is what, but I believe that this is the only analog transmitter in the DTV building, for WGBX-TV (channel 44). The maker of the combiner network was unwilling to guarantee its operation if WGBX-TV remained in the WGBH building, a few hundred feet away, so rather than lose the benefit of the master UHF antenna, channel 44 moved in here.
Copyright 2004, Garrett Wollman. All rights reserved. Photograph taken 2004-05-05.