seems almost every entry is negative and seems almost someone is taking a shot on Spektrum.
and since everyone is starting his own Thread

been using the system for some time now.
it is .......... GREAT

i fly until it is out of sight ..
i abuse it everyday
i crashed allready 2 models (mid-air - 1 rudderhorn elevator came of (fatique))
and still use the same receiver(s)
i mounted the receiver only 5cm from a ignition source
BUT i use a rock solid power suplly that does NOT drop below 5,5 volts at any time...

in my case:
cant wait until they bring out the JR size modules for the MX-22 and MX-24

Same for me Sandor, i have 8 models set up inc jets, props and helis and have 2 TXs. I have (in the larger models) 2x RX running half the plane each and i have not had 1 single problem.

I think that like all things, the same respect must go into the installation. just because its bullet proof, it does not mean you can shoot it!!

Dave Stephens

Hi Dave

Trevor has also had no problems on the Hawk with the DX7, but reading some of the other threads (including props) it seems that the problem is with the power system.

If the voltage drops too low the RX re-boots!
They now supply a capacitor to plug in to the servo rail that helps prevent this happening.

Paul

Dave, Sandor,

Have flown the hawk with DX7 for 30+ flights and in an EDF for around the same number. Complete reliability and all the benefits of flying when you want to without waiting for your peg.

Trevor Skedge.

This is the link to the plug in to help prevent the re-boot.

[link]http://www.horizonhobby.com/Products/Default.aspx?ProdID=SPM1600[/link]

Hi Trev.

Paul

I too have the DX7, with three of the 7ch and 2 of the 6100 Rx and they both work flawless so far. I had one experience were it was my fault in the setup, where I under managed the ESC in an electric DF and was depended on the BEC for a power source. When I over loaded the ESC it shut down and I lost all control of the model. So it is really important how well you research your installation. Now since then I have a TAM Rafale and it flies great on the DX7 with no issues from the radio install, and I am in the process of setting up my Bae Hawk with the DX7. Now I can wait until 12X comes out.

From what I'm reading it sounds like a 5 cell battery pack should be recommended.

Joe

It looks that way, or as mentioned on other threads, use 2 bats. 1 for servos and 1 for the rx.

This way the rx gets a solid supply all of the time.

paul

I use the smart-fly regulator and a two, two cell Fromeco batteries and have no issues and I charge them with my Schulze ISL 6-330d charger.

No problems whatsoever on my MW44 Gold powered Reaction 44. 4 cell Nimh 2300 RX pack, all flight servos midi sized digitals. Many more flights on 2 other electric aircraft with UBEC supplying rx. All flights without incident. Looking forward to the X9303 2.4 to eliminate some Y harnesses.

Dave

Over 200 flights on mine! NOT A GLITCH.

I too am waiting for the 12x.

Billy

this Capacitor is not new, the car boys have been using them on the car 2.4 systems since they first come out! i cant believe no one from Horizon has not mentioned this before? i was aware of this capacitor but never used one as i always make sure i use heavy duty cabling in the batterys and always make sure my batteries / switches can deliver under the loads required. i also only use 5 cell.

i did discover a problem with an RX shutting off on my sons 3M Extra though, and after investigation it was a tag on one of the 3600ma NMH was not spot welded properly and it was just the heat shrink holding the tag in contact with the battery! this was a reputable brand battery! i think on a standard RX i would have not noticed this for a while as normal RXs are not as power critical. i now cut the heat shrink off all my new batteries and check the welds.


bit diaspointed in the JR/ Horizon reps for not being aware of this easy fix. i did mention the fact that the car boys use the capacitor to one of the Spektrum guys at Florida Jets and he just looked at me like i was an idiot!!

Dave Stephens

I too have not had any problems. I have been flying a skymaster hawk with the DX-7 since it was introduced. I however use a battery backer system from Electrodynamics that gives me constant voltage to the receiver.

The General

I have two DX7 systems at work and we did some drop tests for a project where we mounted the rx with double sided tape to the test unit and we saw 12G impacts and the rx has never missed a beat since. I have a 12x on my list for when they are out. Until then I'kk use the DX7 over anything else.YMMV

So, instead of a $6 capacitor, i think that using 2 x 6v pacs of cells at twice the recomended capacity, & wired through 2 separate switches should suffice. Waddya think guy's. ? That's what i use on my jets anyway. Ray

Just got the modules in today from Horizon for all the JR radios.

these are good for Power spikes i agree
been selling them a lot for Cars in the past
since cars have humongous servo,s and uses lots of amps these elco,s are ok for the job
but us with planes have some more room and can use multiple power sources.

Out of curiosity, what's the capacitor's specification?

Kelly

Sandor

As Trevor says we have both used the 2.4 since November last year and so far no problems-My Turbo Raven uses a Powerbox so no problem with power supply, even my SpeedCat i/c with a 4.8v Nicad has been fine over multiple flights.

One thing-you won't be able to use 2.4 in the MX-24...no module to replace.

Regards

Dave Wilshere

a 10000uF 10 Volts will do the trick

mm didnt now that , guess i will have to buy one in the uk then..
also i heard Graupner wont release the 2,4 Ghz yet because of FCC ruling that they are not alow to have more then 100Mw of power.
the spektrum where in the range of 110-120 Mw
but again its hear say cant confirm.

Sandor

I understand it's a little more complicated in Germany/France and that it is unlikely it will be made legal.
The Big Boys want 2.4gHz to themselves and we small modellers may have to take a back seat.

Buying the MX-24 in the UK won't help as Graupner have decided that the built in Synth module will only be available on the German legal frequencies...so it's the PCM 12x for us

regards

Dave

Just two like everyone else?

Just to add mt tuppence worth, Ive been using the dx7 over the last couple of months, in two EDFs, one with a speed controller with BEC and the other larger EDF with 6 midi servos driven off a seperated BEC.
No problems whatsoever experienced and perfectly happy (so far!)