Just wanted to mention.
There are some posts in another thread, which I think might suggest a possible solution for receiving a troublesome Channel 6, with interfereing FM signals coming from the same direction. (ie. like the Global issue)
A specific channel 5 yagi - or something close to that design.
Delhi 5y & 10y Channel Cut VHF Yagis - Saved From Oblivion For DIYers
Post # 111 by 300Ohm - characteristic graphs for the ch 5 yagi - showing the roll off in the FM.
Post # 115 - suggestion by myself
They have some graphs showing some characteristics for a Delhi specific cut channel 5 YAGI that look like an interesting possibility (to me) for a test.
Theory / Question / Possible Experiment:
Would a Delhi 5Y5s or 10Y5s, cut channel yagi for channel 5, or something close to that design, receive channel 6 well enough, and cut down FM at the same time - in order to better receive those troublesome Global signals on channel 6 ? ( ex. Ottawa and Paris?)
Use a channel 5 specific cut yagi, or something close that design, to receive channel 6, and at the same time cut down the interfereing FM from the same direction - based on the characteristic roll off of that sort of antenna, shown in the graphs, for the interfereing FM. (?)