RE: can I use a JR xp6102 with my nexstar that has futaba rx
If you aren't in North America, you can, or if you are on ham frequencies. It's only here in the US, Canada & Mexico (I think) that Futaba & Hitech use negative shift. I fly on 6 meters (ham) and I have a couple of ham freq Futaba receivers that were given to me that I fly with my JR 8103.