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The right way to use multiple antenna systems would be an A/B switch or separate tuners.
That being said, 122 – 36 = 86 which is almost 90. So you are pretty close to the situation where just combining two antennas with a splitter reversed is most likely to possibly work. If two antennas with deep nulls 90 degrees off axis are pointed perpendicularly and then combined, on paper, they should not be picking up signals that will interfere with each other. (The non-committal language is because this is an experiment at your own risk suggestion).
If there are only a few sub channels from 36 degrees you want and you don’t mind SD picture, you could get a converter box for each sub channel you want from 36 degrees. Then you could modulate the analog output (red, white, yellow RCA) from each converter box to an unused UHF channel (remember most TV’s have analog tuners that go to RF69) from 122 degrees.
If you want everything HD with a pretty interface, windows media center, tuners such as the HDHR, and Xbox 360’s would let you combine multiple antennas. WMC can use multiple tuners. Each tuner does not need to get the same signals. When setting up digital antenna signal strength, just tell WMC which tuners get which channels. Then WMC will put everything together in a nice guide. Put an xbox 360 at each TV, connect everything with network cable, and you will get a whole house DVR with the ability to use multiple antennas without any complicated filters.
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