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A while ago, I bought a handful of Spektrum AR7000 receivers and a Spektrum 2.4 GHz module to go into my existing JR 9Xii transmitter. It all worked fine and the models that I'd transfered to 2.4 GHz were just exactly the same as they had been previously on 35MHz.
Now I've got some more Spektrum receivers and have converted the rest of my fleet to 2.4 GHz, so I've treated myself to a new Tx - a JR DSX9.
Good thing about the 9Xii and the DSX9 is that you can use the data transfer function to copy all your models directly over from one Tx to the other. Sounds simple, and appeared to work just fine.
I've been playing with the new radio this weekend. Flew a plane first, and it needed a bit of trimming out - seemed mildly odd as it was perfectly trimmed before, but wasn't alarming so I adjusted the trims and thought no more of it. Next I flew my Freya (mechanical mixing) - this also needed a bit of trim on the cyclic but again, no real hardship there. It also seemed to lack a smidge of power at full stick. Then I had fly of the Vibe (CCPM mixing). Flew a whole tank and it was horrible - struggled to keep it in a straight line and it definitely lacked oomph at the top end, so I started investigating. Remember, all these model settings were identical to those that I had been running in the 9Xii with the Spektrum module with no problems at all.
Turns out - all the servo centres have moved, quite noticeably which has caused all these issues. it just became most noticeable with the CCPM heli - the swash plate was on the wonk and my pitch range had shifted from -+10 with 0 at the middle to -14+9 with -4 at the middle. Also the throttle servo was giving me full throttle and the rudder servo has shifted in normal mode - didn't notice it in HH mode, cause the gyro just holds it where ever it needs to be.
I'm now in the process of going through all my models and resetting them.
Strange tho - I'm a little disappointed that having changed from one JR Tx to an almost identical JR Tx (all bar the modulation), that there's such a difference in something like this.
Be advised.
Now I've got some more Spektrum receivers and have converted the rest of my fleet to 2.4 GHz, so I've treated myself to a new Tx - a JR DSX9.
Good thing about the 9Xii and the DSX9 is that you can use the data transfer function to copy all your models directly over from one Tx to the other. Sounds simple, and appeared to work just fine.
I've been playing with the new radio this weekend. Flew a plane first, and it needed a bit of trimming out - seemed mildly odd as it was perfectly trimmed before, but wasn't alarming so I adjusted the trims and thought no more of it. Next I flew my Freya (mechanical mixing) - this also needed a bit of trim on the cyclic but again, no real hardship there. It also seemed to lack a smidge of power at full stick. Then I had fly of the Vibe (CCPM mixing). Flew a whole tank and it was horrible - struggled to keep it in a straight line and it definitely lacked oomph at the top end, so I started investigating. Remember, all these model settings were identical to those that I had been running in the 9Xii with the Spektrum module with no problems at all.
Turns out - all the servo centres have moved, quite noticeably which has caused all these issues. it just became most noticeable with the CCPM heli - the swash plate was on the wonk and my pitch range had shifted from -+10 with 0 at the middle to -14+9 with -4 at the middle. Also the throttle servo was giving me full throttle and the rudder servo has shifted in normal mode - didn't notice it in HH mode, cause the gyro just holds it where ever it needs to be.
I'm now in the process of going through all my models and resetting them.
Strange tho - I'm a little disappointed that having changed from one JR Tx to an almost identical JR Tx (all bar the modulation), that there's such a difference in something like this.
Be advised.
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