N2NXZ

Just so you know about 70 mhz and why you may be getting interference. These links should pretty much give you the answers - http://www.arrl.org/news/fcc-turns-down-petition-to-create-a-4-meter-band-in-the-us https://www.iaru-r1.org/index.php/spectrum-and-band-plans/vhf/4-meter I would be careful using 70mhz to be honest. You could get your ham radio license,they are practically giving them away and entry level license will allow you to use 50 mhz (6 meter band) for your own personal RC frequency if you wanted to. https://radiocontrol.fandom.com/wiki/List_of_RC_frequencies Jim