Spektrum DX-7 - impressions, infos, reviews

[ave_eme]

Hey Folks!

I was thinking about a DX-7 and i would like to know some more about it.

So...I made a thread special for this TX. If anybody know anything pro's, con's, impressions, infos, links, maybe a short review, about accesories etc. feel free to write it down for me and others interested in this radio.

Thanks.

[Filby]

Had mine for about 6 months now and am very happy with it.

Pros are obvious: its 2.4ghz

Cons:
No analogue throttle trim (easier to switch off a nitro engine)
Not well weighted, tends to hang down at the back
Few missing software features


Thats about all I have got. One of the best RC decisions ive made was buying the DX7!

[ave_eme]

Thanks man!

Well...I was actually doing some research on all the spektrum products but i have some misunderstandings:

1. Do you have to bind every time before you fly?
2. Has anyone really checked the range? Is it really suitable for ANY kind of model as they say?
3. Is the 1500 mAh NiMH akku included in the kit?
4. And what other Extras do you have in the kit? ( I couldn't find any "Kit contents' in their website)

[Jermo]

Thanks man!

Well...I was actually doing some research on all the spektrum products but i have some misunderstandings:

1. Do you have to bind every time before you fly?
2. Has anyone really checked the range? Is it really suitable for ANY kind of model as they say?
3. Is the 1500 mAh NiMH akku included in the kit?
4. And what other Extras do you have in the kit? ( I couldn't find any "Kit contents' in their website)

1. No
2. Yes range is futher than you can see the model.
3. Depends on what you buy. It can be purchased without it.
4. Depends. Vendors offer it in different kits. Ask/email for best results.

[ave_eme]

Thanks for the answers..bu i have some more...questions not answers...doahh :)

As I read the DSM2 technology is a bit different than the Futaba's Fasst. One of the most important things I noticed:

Futaba says that their Fasst is constantly changing chanels every 2 ms and if accidentaly another sistem (may it not be a RC) interferes you can't have more than a 2 ms lost...which is something you probably wont notice.

As for The Speektrum DSM/DSM2 they say when you turn on the RC it searches for a free channel and sticks to that. And eventually if somebody else starts it's RC it will happen the same thing so interference is eliminated. BUT! What if while you are flying somebody switches on other 2.4 G system (Wireless Network or other stuff) ?? Wont that spell INTERFERENCE?? :confused:

On the field this is not a problem...but I (and I think i'm not the only one) sometimes fly at the stadium, which is close to my home...and I think my Wi-Fi back home beats to there .. :-s

[Sherpa FE]

No, you can have up to 40 open channels using the Spektrum system, WAY more than will ever be flying at the same time.
If for example I am flying on 2.4 and you turn on your system while I am flying, your reciever will look for an open channel, if there is none, it will not "lock" into a channel and will not cause interference with another system.

[ave_eme]

Ok...I understood that. The RC searches the channels, avoid the computer wireless lan and locks onto a free channel. But what if you have a wi-fi turned on while you are flying and are already locked onto a channel and the wi-fi emites in the same frequency you are locked onto!
Actually what i am asking if there is a sort of dynamic frequency.

[Sherpa FE]

The only interference that I have heard of is the spektrum 2.4 interferring with remote cameras and such. I have not heard of anything with blue tooth, or wi-fi, cell phones, house phones or anything else. I love my 2.4 system.
Keep in mind that NO system is bulletproof though.

[HFG]

i dont own a spektrum radio, i have a 9303. For as many problems 2.4Ghz claims to eliminate it seems to create more of its own. Look around the forums here, looks like there are ALOT more ppl with "glitching" problems or firmware issues then 72Mhz problems. Yes any 2.4Ghz device has the potential to cause interference. Most ISM band systems use random frequency hopping, most have very crued collision detection schemes. But if your flying out in a feild your not likely to be close enough to a transmitter to cause any serious problems.

[txflyer]

ive got a dx6 and fly in my back yard, with my cell phone in my pocket, house phone on my hip. i have wireless internet, andmy back yard is out lined by telephone poles and cables. i have never ever had a single problem with glitching or anything like that. from the firs ttime ive used it to yesterday never a single problem...

ive flown out at the local off road rc track while they were racing. alot of guys use the spektrum surface radios and 1/3 of the guys dont they use fm systems. never a single a problem...

[Sherpa FE]

i dont own a spektrum radio, i have a 9303. For as many problems 2.4Ghz claims to eliminate it seems to create more of its own. Look around the forums here, looks like there are ALOT more ppl with "glitching" problems or firmware issues then 72Mhz problems. Yes any 2.4Ghz device has the potential to cause interference. Most ISM band systems use random frequency hopping, most have very crued collision detection schemes. But if your flying out in a feild your not likely to be close enough to a transmitter to cause any serious problems.

I am not totally convinced that those "glitches" are not due to operator error. I have mostly flown planks, and they are screaming the same thing. Come to find out the antennas were not mounted properly, they modified it somehow, or some other problem that they caused.
Like ANY new technology, it is going to have growing pains, from both the manufacturer, and the operators, on proper usage, and improved safeguards.
I do agree though that there have been problems, with the new 2.4 systems, and MOST of those had been manfacturer defect.
Just my .00002 cents worth, since I am in no way an electrical enginner.

[HFG]

ISM isnt by any means a new technology, most if not all of these systems are based around off the shelf components or hard IPs. The manufactures add a uP to do the interfacing between the PPM signal and the ISM RFIC. I agree with you about most of the glitches being due to operator error, but same with 72Mhz stuff.

[Sherpa FE]

Understand about the ISM not being new, I meant towards the application of RC.

[BarnOwl]

The major advantage of the DX7 is the directness of control. I did not have this experience with my former Futaba PCM. It really improved my flying.
The glitches: Since I have the DX7 I have had one problem with glitching on a faulty AR6100 rx a long time ago. I never experienced any glitches on my 7000 rx. I have it for months now.

[ave_eme]

thanks a lot guys for the feedbacks :D

[Jermo]

DX7 since I started flying in Feb. Zero issues. Now I have 2 TRex450s and a 600.

[KrazyKyle]

I'm also thinking about a DX7. I would like to use it on fixed-wing as well as helis (I don't have a heli yet...stil researching).

Does the DX 7 have things like elevon and V-tail mixing available? (I will gladly explain all the little flappy thingies on fixed wing for those who need a refresher!:wink:)

[txflyer]

DX7 Airplane Function Mode


Dual Rates
Exponential
Servo Reverse
Sub Trim
Travel Adjust
Elevator to Flap Mix
Aileron to Rudder Mix
Flap System
Differential
Programmable Mix (1-6)
Servo Monitor
Timer

[joehelicopter]

is the reciever/flight pack battery.
You must have a battery the can sustain the load.If battery voltage drops too low,the reciever shuts down and re-sets....can take several seconds!
I use a large LIPO and a regulator-running 6 volts to the reciever and servos.
This radio has the best feel/response of any I have owned-very connected to the model:thumbup:

[Sherpa FE]

(I will gladly explain all the little flappy thingies on fixed wing for those who need a refresher!:wink:)

:lolol:lolol:lolol:lolol
:nanabobo
Yeah, take that...LOL

[BobbyL]

I just bought a used dx7, its about 3 months old,,,, nice radio,, but something scary happened,, during setting up for a new heli,, wz just about too set the gyro up and center it, when pop! the fuse inside the dx7 blew,,,,,,, I have no idea why,,,,,,,,, went too radio shack and picked up a new fuse,, I have been playing with the radio,, so far ,, no blown fuse,, this is scary ,, what if this happens again in flight with my new trex 600????/ oh my,,,,