DX-7. This Changes Everything.. Again!

[madmax]

Alright guys, slow 'er up please.

[bodywerks]

	Quote: Originally Posted by Green-Giant
	looks wicked but i am not 100% on 'spektrum' ???? is this just synthesised with a new name????

Your current systems are 72mhz and have a set number of frequencies. If you take off on channel 29 and someone in the pits turns on channel 29, your plane crashes. Also, at 72mhz, the band is in very close range to a host of different pieces of equipment in our planes that cn vibrate and occilate at smilar frequencies and cause interference and, thus, crash your plane.
Synthesization as you are refering to is still 72mhz but you can change frequencies without changing crystals. Contrary to popular belief, there is still a crystal-type device in a synthesized module or receiver, but you are changing the frequency in which it occilates when you turn the pots to a specific channel. It will still receive interference from vibration and onboard equipment and will still go crazy when someone turns on their radio that happens to be on your channel.
2.4ghz (which the Spektrum operates on) is digital and truly crystalless. It is at such a high frequency, too, that no known equipment that we typically put in our planes can even come close to producing high enough frequencies to come close to causing interference.
Also, every time you turn on the system, it scans for open "channels" and locks in to it. If there are no open channels (virtually impossible) it simply will not come online. This means that once you are on and flying, no one can turn on to your frequency and, therefore, no one can shoot you down. Also, as I understand it, the Spektrum system constantly monitors the strength of the current signal. If it decides that it is not 100%, it automatically switches to a more solid open signal and you will never know it.
Again, I am not radiowave guru and I am sure there are better technical explanations, but the bottom line is this is so far from anything 49-72mhz or synthesized that it doesn't even associate with it.
I love and notice the way more solid connection I have with my DX-6 (yes, I do own one) and I love the idea of 2.4ghz, but I have 8 or so small electric planes in my fleet, and the only plane with the DX-6 is a pylon racer with aileron and elevator. All my other planes are still 72mhz because they are aerobatic planes and my 9303 has the capabilities I need to set them up. The DX-6 is lacking in multipoint mixing, rudder expo, and doesn't even have adjustable gimbal springs!
I am sure the DX-7 has more capabilities besides just another channel, but it still won't replace my 9303.

[bodywerks]

	Quote: Originally Posted by madmax
	Alright guys, slow 'er up please.

Sorry 'bout that. My post did come out as a little hostile - it was not the way I meant it. I "worded" it a little better!

[bryan01601]

If you read the manual this radio also prevents you from having the wrong model selected in the radio. If you have the radio set to model #1 it will only operate model#1. Pretty cool. No more taking off with the wrong model selected in the plane.

The manual is located here. http://www.spektrumrc.com/ProdInfo/F...DX7_Manual.pdf

[TheTank]

	Quote: Originally Posted by bodywerks
	I am no radio wave geek by any means, but I don't see how much more interference you can expect from a 'typical' giant scale gasser. Being that the system operates at 2.4 ghz, it is WAY out of the interference wavelengths of anything on the airplane.

Biggest problem is on a large gasser is when you are flying towards yourself, you have an 6-10 pound block of metal which shields the signal, and if you are running a carbon prop, you then add a 27-32" carbon disk that the 2.4 will not pass through. This is directly from JR at Joe Nall 2006 in reference to the Spektrum technology in the DX6, It seems they have found a way to solve it in the DX7 with the twin RXs and antennas that are 90 degrees out.

[jongurley]

They must have gotten it down to a art,, I think the alien looking antenna extension takes care of that,, , ,now if they will just come out with a module for my 9303.....

[kahloq]

I have to say I am a little ticked off now. I have been running a Dx6 in several electric planes with zero issues at all and its great to not have to worry about the freq. board. Gets a little annoying with ppl asking me what channel I'm on, but funny at same time to see their face when i say I dont have a channel. Anyways...I'm ticked because I just bought a JR 7202 system a month ago because I'm starting to get into 60 size and 90 size planes(with eventual move into 27% and larger) for which the DX6 is not useable. I am going to have to ask if the LHS will take my 7202 back in exchange for the Dx7

[bodywerks]

Kahlog, is FTC Fort Carson, or Fort Collins?

[Spinner]

Oh this is sweet! Thanks to the Spektrum guys WTG! I'll be getting one of these in Nov. Can't wait. It is exciting to watch the technology grow.

Looks like they won"t be shutting down the Patent Office this century either

[faces0fdeath]

sounds fair ...

[adrian]

anything on price?

[dick hanson]

need more than 7 channels?
porque?
parachute drop ?
candy drop?
pilot waves arm?
what is pro class setup ?
My 10x and 9303 have more channels but the signal interpreted in the TX and executed at the RX is the same as the 7 Channel---
I will stick the new 7 in my 42%- just add more servo inputs externally

[bodywerks]

It's not the number of channels needed for sparachute drops that disappoints me, although having to run matchboxes or a powerbox on pretty much any gasser is a PITA and a waste of money for me. My typical setup is a 10 channel receiver with all the recepticals filled:
left aileron servo(s, on a Y-harness) - aux2
right aileron servo(s, on a Y-harness) - aileron
left elevator - gear/aux1
right elevator - elev
rudder(s, on a Y) - rudder
throttle
Ignition cutoff - aux4
battery leads - aux3, aux5, aux6, batt
All of this done with no added weight or matchboxes...
Still, I use my servo speed adjustment features, my multipoint mixes, my flight modes (where more stuff changes than just dual rates and expo, like trims and various mixes), and I have a trainer button that I programmed to be my ignition kill so that I don't inadvertantly flip a toggle switch and go dead. If, by some miracle, some genius comes up with a way to stuff this thing into a 9303, I might be willing to overlook the lack of channels on the receiver and buy one, but only of the XPS is not available by this January.

[Flyinrazrback]

I think this system would work for the most of us, the only thing I would add is a smart fly power expander to increase the number ports so y-harnesses would not be needed. I may give one of these a try unless in the next month or two something comes along where I can use my 9303.

[kahloq]

	Quote: Originally Posted by bodywerks
	Kahlog, is FTC Fort Carson, or Fort Collins?

Fort Collins

Fort Carson is in Colorado Springs. Been there, but too much snow for my taste.