JR-9303 2.4 Field Results

[dick hanson]

The resolution--a tricky thing -- In actual use the 2.4 DX2 is very tight feeling
To me ,it is far better than the 1024 72 stuf

The two have to be flown side by side to see effective difference .
One point not many have picked up on - the 2.4 on non digital servos works extremely well .
In my book - I prefer this combo but the digital servo is entrenched in the minds of many -as the best - and there are really only a few high powered non digitals with which to compare .
A 2.4 DX2 and the very inexpensive 126 Sport servo by JRSport -on 6 volts is really quite an eye opener. The 9303 , I have back ordered but my present DX7 does all the basics the same way. Having owned and flown all the various 10 series JR and the 9303 (non 2.4 type) I am confidant the new one will be a excellent unit.

[wgdenge]

OK, I did not use the new 9303-SS, but I converted my 9303 to SS.
I re-maidened my YAK it this weekend with SS. (2.6 CompArf YAK, PowerExpander, 106qs, ect.. ect...)
I was very pleased.

I, would like to know what kinds of readings people are getting in the data-logger after each flight.

I have the 9000, with the extra reciever, so 4 recievers in total. I registered 5 frame losses in 1 flight.
The manual says anything under 20 is good.

Have any of you moved recievers based on data-logger readings..?

Just looking for other experiances.

wayne

[Zeeb]

	Quote: Originally Posted by Mudsurfer1234
	Here's a newbie question, what's the resolution like on the 9303? Is it better than 1024 PCM on 72 MHz? as in higher resolution (not response time)

Okay I'm a little fuzzy on this one and I can't find the post right now, besides the fact that it was on "another forum" but IIRC, here's what Danny said about that.

The new X9303 is capable of a 2048 resolution when coupled with either an AR9000 or an R921. The thing I saw which brought this up was a guy who'd previously been using a DX-7 setup with an AR7000 and tried to set it up with his new X9303 and was having some problems. Danny said something to the effect that the tx had to "learn" to use the 1024 resolution for that model match and would not try to broadcast with the higher resolution once set.

So don't shoot me if I missed something on exactly how the system works since I don't have my new X9303 yet, I can't say I've tried it but will do so with the two models I have flying with the DX-7 right now. I will tell you that the "more connected feel" they talk about with the DX-7 vs. a 72MHz system seems to be accurate in my experience with those two models I've already converted. So even if the standard 1024 is all you get, I think you'll be pleasantly surprised at the result. I think Steve mentioned something to that effect in his first post???

[Edge540 Freak]

So does anybody have any more field reports of this radio? I'm gonna get mine soon, but I just wanted to see how everybody else was liking theirs.

I've never owned a JR radio but how does the programing display compare to Futaba?

[bodywerks]

my understanding of resolution is that it is FAR superior to 2048, but I may be wrong...
I do know that I have a much more "locked in" feel with my DX7 than that of any other radion I have used.
I have the 9303 2.4, and it will be going into my H9 35% 260, with CF pipes, CF wingtube, CF spinner, and CF prop. I plan to mount the satellite rx up in the cockpit, and the main rx on my Power Expander Pro. The rx will be powered through the Power expander via two sets of A123 lithium batteries, no regulators.
I already voided my warranty on my 9303, though, as I was told by Horizon Service reps that this radio could not be converted to stick mode 4 due to no hidden system parameters existing for it (funny, they switched over both of my 9303 72mhz no problem). It can be done mechanically by switching wires, but they said they wouldn't do that for me, so I did it myself. I have full confidence in my conversion as I had to do it to my Dx7 for the same reason (Horizon not wanting to help me) and have over 200 flights on it without issue.

[madmax]

FG Product Perspective is posted. The X9303 2.4 is 2048 only when used with the Spektrum AR9000 and the JR R921 receivers. Nick, get an extra satellite rec. The R921's sat's are fully interchangeable with the AR9000's FYI.

Sweet setup on the H9 BTW, make sure to post some piccys.

[madmax]

BTW, Pinning this topic folks. Keep the discussion alive.

[btomlinson]

My 9303 will be here today... Fed Ex overnite :>)

[bosshoss]

I am testing on these for a friend, we are putting it in a beat-up gasser of mine. I will be using my standard power setup for 50cc class.

Fromeco Super Regulated Reliaswitch, 3 3amp leads into the receiver (2 if only 2 fit), heavy gauge input wire from the batts with Deans conn.

Since the plane is a Yak with a large canopy....we will stick the dongle recvr up into the canopy on a wood stick , so it can look "out". I did this with my AR7000 and DX7 on this bird and it was fine. My knees were knocking , but the plane was fine. LOL.

It will be cool to download the program from my '03 to the 2.4 '03.

[1bwana1]

Yesterday, we tested the system in a 40% Carden Extra. Once again, the transfer of the programming between the 72 MHz 9303 and the new 2.4 X9303 went perfectly. This time the RX was mounted to a Smart-Fly power Expander. I read somewhere that the Smart-Fly power expander line is the only system that has never shown a reboot during testing at Horizon, so this seems the safest way to go. We got a perfect range test at double the recommended distance. When we range test, we always rotate the plane so that we test from all angles. Three of us flew the plane on multiple flights with perfect results. We all agreed that the plane felt "touchy" so we ended up increasing the Expo in the radio and it settled in perfectly. Could this be the result of the higher resolution?

The current setup still only has the main RX and one satellite. The extra satellite RX and data logger have arrived so they will be installed prior to the next test. The connection seems solid but without data, we could be on the edge and not know it. It will be interesting to see the results.

There is another guy flying a DX-7 based system (AR9000) at the field. It is in a 2.6m CompARF Extra. He has the main RX and 2 satellite RX installed, as well as the data logger. He has flown many flights with the system. However, on his last flight, the plane went into lockout for about three seconds. Fortunately, it came back before he crashed, and he was able to land without damage. When the data logger was examined, it showed no dropped frames, fades or any other problem. We assume that this means that the RX re-booted, wiping out the data. I always thought that it took longer than that for a re-boot, but with no other indication of problems, what else could have happened? I guess this means that the data logger is not useful for diagnosing voltage issues. This is a problem, as it seems voltage drops are the most frequent cause of crashes with this system. He is now afraid to fly the plane. He did not have a power expander installed, so I have suggested that he get one.

Given what we have learned so far, I can see the need for a product designed specifically for the Horizon/JR 2.4 systems. It would include the current power expander features, plus a data logger that includes voltage info that persists after a re-boot. It should also include some system that absolutely keeps the voltage above the re-boot limit (assuming the batteries don’t fail).

We will continue to experiment with the system as we escalate it up to the competition planes. We’ll keep this thread updated as we do. In the mean time we are interested in hearing from the rest of you.

[bosshoss]

1Bwana,

I onder if an Eagle Tree together with the data logger would help. Doesn't the ET record voltage on a timeline for each flight?? This might help.

Does the DL have a timeline??

Keep up the science based testing, this is great info, glad you saved the bird.

We are doing a maiden on a H9 260 with the 2.4 '03 tomorrow morning. It should go well.

[GooseF22]

	Quote: Originally Posted by Edge540 Freak
	So does anybody have any more field reports of this radio? I'm gonna get mine soon, but I just wanted to see how everybody else was liking theirs. I've never owned a JR radio but how does the programing display compare to Futaba?

Freak,
Its pretty intuitive, moreso than futuba in my humble opinion. I picked up an old Jr six channel, borrowed a 9303, and bought a DX7, which is identical almost to a JR 7202, it was pretty darn easy. Expo is opposite, and volume max is 150%, offset works a little different. Other than that its a no brainer. I came over from a Futuba super 8, which I just ordered a sptktrum module for, since it has all my smaller models on it, and I dont have to switch everything at the same time $$$. I really had no trouble. All radios have the same basic fuctions. I programmed a 10x not long ago, just had to look up the codes.