Originally Posted by
marksp
Interesting comment.
The appeal of 900 MHz alternative channel is to mitigate the 2.4GHz radio “hits” experienced by many flyers at my local field. If 900 MHz is unusable, well then that would suck.
How did you identify the 900Mhz issues? If possible, it’d be great to sort before buying and flying.
Cheers
Where I fly 900Mhz is absolutely saturated. A small aerospace company asked if they could test fly some drones at our site and when they went to try it they found their 900Mhz gear would barely operate at all at our site. These types of issues will be location specific so it may work perfectly for you, but there is no guarantee it will work everywhere.
The only way to tell is to try it, do range tests, etc and see how well it works. A single receiver isn't all that expensive. I'm only suggesting you try it on a single aircraft to see how well it works for you before buying a 900Mhz receiver for every airplane your own..
I also would recommend the setup ZB posted with 2, 2.4Ghz receivers and a 3rd 900Mhz backup. If you fly at multiple fields then most everyone is on 2.4Ghz so that should work well enough at any flying site and even if 900Mhz doesn't work well at every place you fly, you'll still have dual 2.4Ghz receivers..