AFAIK there was no pressing need to get off the Medford tower up behind Malden Hospital, especially with the translator covering downtown
Now, 'FNX is limited to a couple hundred watts toward the South Shore-they have a worse signal there that they used to have from Medford, even though they are physically closer. Originally 'FNX had a CP to run 3 kW ERP from about halfway up the Medford tower-I was the one that insisted on the tower top. I did so for several reasons. First, Frank DiRico was just beginning to develop the tower-and having the antenna part way up would have meant going off the air a LOT when climbers were on the tower. Second, we did a shadowing study and found that downtown Boston multipath would have been MUCH worse from lower down the tower. Finally, the power hit was less than 3 db (1650 watts vs 3000 watts), and the extra 140 feet also pushed the 1 mv contour out a few extra miles to the west (you used to be able to listen to 'FNX clearly within pretty much the entire 495 corridor (except due south toward 101.5); now it barely covers the 128 corridor). Finally, there was a reason the antenna was positioned on the pole the way it was-it blew about 4 db more power in the vertical plane towards downtown Boston then a 'real' non-directional antenna. It would have been even more, but the Phoenix botched the leasing process with Harvard and we wound up having to use a 3 inch mounting pole instead of a 5 inch one. The irony was that the complimentary null went right over Lynn, the city of license.