Drink wrote:
"Don`t know how many floors up to your roof but, at 43 plus floors,
you`d get awesome reception I suspect if you just put a real antenna on
the roof and ran the line down to your office."

It`s worth a try but may not result in a clear picture. I`ve fought that
battle from the roof of the almost highest building in town. You are
probably at about 650 feet and the TV horizon if visible would be about
36 miles away. Line of sight may have little to do with your problem.
Other structures in a city reflect delayed signals in your direction,
blurring your reception.

You need high directivity to "turn a blind eye" to the multiple
reflections.

Best regards, Richard Harrison, KB5WZI