Stacking FM & TV Antenna's

[WDX4CWC]

I have a question about antenna's. I have for FM antenna an APS-9 on a rotor. I now have a TV antenna that I have mounted temporarily on a different mast, utilizing the arm-strong rotor method as of now. Can I vertically stack the FM and TV antenna's and utilize the same rotor/mast without degrading performance of either antenna? If so, how far apart should they be? If not, how far should the antenna's be apart horizontally if on different masts?
Any help, thoughts or input would be very helpful.
Thanks,
Craig Cook WDX4CWC EL98JQ

[bozey45]

vertical stacks are usually 4 ft. or so apart. If the other is a TV only antenna and not designed for FM also that should be fine; if the TV antenna is cut for FM also you can usually trim the FM element(s) as per the instructions that came with it. But 4 ft. is the usual distance aoart for vertical.

[WDX4CWC]

Thanks, think I am going to space it about 5 or 6 feet and give it a try.