RE: Spektrum DX-7  
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    • All Forums >> Radios, Batteries, Clubhouse and more >> RC Radios, Transmitters, Receivers, Servos, gyros >> RE: Spektrum DX-7
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    RE: Spektrum DX-7 - 10/21/2006 3:44:53 PM   
    Geistware



    Posts: 12946
    Joined: 4/9/2002
    From: Locust Grove, GA, USA
    Status: offline     		You are right, JR is not Spektrum. They are a joint venture with JR supplying the radio control expertise and Spektrum supplying the modulation and transmission technology. Any way you look at it, JR will get the publicity whither positive or negative. Brand loyalty will last as long as a modeler is getting what he/she desires from his/her equipment. I prefer Futaba. If JR releases a product (under what ever name or association) that better meets my needs without a counterpart from Futaba, I am not adverse to change.

    _____________________________

    Aircraft Proving Grounds
    http://www.rcaircraft.net/
    Information on the building and flying of Radio Control Aircraft.
    Site for hobbyist in the R.C. Aircraft modeling world.

    (in reply to pilotpete2)
           Post #: 26

    RE: Spektrum DX-7 - 10/22/2006 2:28:29 AM   
    Jimnie


     

    Posts: 158
    Joined: 12/4/2003
    From: Monticello, IL, USA
    Status: offline     		air mail,
    Yep, it is cool, also there is another huge feature I see people have not picked up on. DX7 has Model Match. Because the rx in a DSS system communicates with the tx then it transmitts an id signal. If the transmitter memory is set to a certain model but the receiver is in a different model the system will not work. The transmitter must be set to the same model as you are trying to fly.

    If someone says they haven't ever been shot down then they either don't fly models or their time is coming. If something can happen it will. With DSM there is no chance to get shot down, thats all. BTW, DX6 has been flying for almost two years and there are many posts on RCU from people who have been flying it in glow models from the beginning. The other one regarding the model memory is the same, at some time everyone I know has at least tried to fly or has crashed because they didn't select the correct model, so same thing, if it can happen it will.

    It is backward compatible with the DX6 receiver so it flys park flyers or indoor models with many more features than the DX6 (including a flight timer for the electric guys). And the price is right.

    Pretty good article with quick to the point features: try this: http://www.horizonhobby.com/Articles/Article.aspx?ArticleID=1626

    Jimnie


    (in reply to air mail rcu)
           Post #: 27

    RE: Spektrum DX-7 - 10/22/2006 2:46:18 AM   
    RTK


     

    Posts: 3953
    Joined: 4/20/2003
    From: CENTRAL , CA, USA
    Status: offline     		Check out http://www.xtremepowersystems.net/xtremelink.php

    (in reply to Jimnie)
           Post #: 28

    RE: Spektrum DX-7 - 10/22/2006 5:51:32 AM   
    Electriceddie



    Posts: 330
    Joined: 8/21/2002
    From: Massapequa Park, NY, USA
    Status: offline
    Guys,

    Like I said before 95% of the guys who crash won't admit it is pilot error. They blame it on the radio. If the radio absolutely does not get any interference 110% when in use and a crash ocurrs, then we would have to say then that it was pilot error, correct? So no matter how perfect a radio may be it is still controlled by a human being who is not perfect, although many believe in the own minds that they are. After all, we all know the guy in the club, and we all know one "Who is a Legend in his own Mind" that he is a "Hot Shot" pilot and does not ever crash, so it must be radio interference. Most fields have pretty good frequecy board control that I have been at, and if it is followed by all there won't be any accidental shoot downs.

    However spread spectrum will help stop the accidental transmitter on your frequecy, being turned on by some geek at the field and shooting you down. Good frequency board control will do that, but pilot error still remains.


    At our field we have good freq. board control. Sometimes what may appear to be an interference issue at first, which turns out upon inspection to be a bad switch or a low charged battery or some similar issue. In the last couple of years that I recall there has not been one documented crash due to actual radio interference at the field I fly at.


    So get spread spectrum possibly to eliminate the possible shoot down from the accidental turn "ON" of a radio on your freq. But don't be fooled by the spread spectrum system that if you buy it you will never have a crash.

    Just something to think about, another angle of many out there. I am not putting down spread spectrum I think the technology is something worth following up. I just get the feeling from what I have read that some people feel this will solve all of their airplane demise problems.


    Happy flying

    _____________________________

    "GO FAST & TURN LEFT"

    (in reply to Jimnie)
           Post #: 29

    RE: Spektrum DX-7 - 10/22/2006 5:57:38 AM   
    Geistware



    Posts: 12946
    Joined: 4/9/2002
    From: Locust Grove, GA, USA
    Status: offline     		Personally, I am more afraid of the local park flyer who turns on there TX and goes flying or attempted to fly and crash. A $180 model purchased at the LHS and then taking to a nearby field is more dangerous than anything that I can imagine.

    _____________________________

    Aircraft Proving Grounds
    http://www.rcaircraft.net/
    Information on the building and flying of Radio Control Aircraft.
    Site for hobbyist in the R.C. Aircraft modeling world.

    (in reply to Electriceddie)
           Post #: 30

    RE: Spektrum DX-7 - 10/22/2006 6:11:09 AM   
    Electriceddie



    Posts: 330
    Joined: 8/21/2002
    From: Massapequa Park, NY, USA
    Status: offline     		Geistware,


    Understandable. I just can't believe that that would be an issue. In the area were we fly there are several clubs in a 15 - 20 mile area and of the 2 that I fly at, there is no place that a Park Flyer could fly close enough to us. Is that rally a problem? What percentage across the board with respect to interfernce does that represent? Is it a small or large percentage?

    Hey here's an Idea! Most Park flyers flying RC is a novelty after a destroyed plane or two they will probably not be back into RC anyway. "So shoot them down first"
    LOL

    Only kidding..........



    _____________________________

    "GO FAST & TURN LEFT"

    (in reply to Geistware)
           Post #: 31

    RE: Spektrum DX-7 - 10/22/2006 7:16:35 AM   
    akschu



    Posts: 411
    Joined: 3/23/2005
    From: , AK, USA
    Status: offline     		I don't care about the frequency control as that has never been a problem for me up here in Alaska. That said, I still like the idea of having a data link to the airplane where more than servo positions can be transmitted. Obviously the DX7 doesn't do any of this so I'm not even looking at that radio, but if the Extreme link stuff comes though and is proven to be reliable, I'll be all over it.

    As far as peoples comments about the frequency band, it's all give and take, higher frequencies offer more bandwidth, and use less power, but are also much more line of site. Lower frequences are subject to metal linkage, carbon fiber, and other problems, but don't require as much line of site.

    Either way, it comes down to reliability testing with your equipment on your plane. If it works for you then use it, but that doesn't mean it will work for everybody else.

    (in reply to Electriceddie)
           Post #: 32

    RE: Spektrum DX-7 - 10/22/2006 1:27:49 PM   
    Bosshossv8


     

    Posts: 1664
    Joined: 8/12/2003
    From: Schiller park, IL, USA
    Status: offline     		I like the technology, I used a DX6 unitl it was stolen.

    But, the disrespect shown by HH will keep me from buying this "lower line" radio. I was given the "lower line radio" spiel when talking on th phone with them about the DX6.

    Question for HH: Is this still a "lower Line" radio?????

    HH stop milking us in baby steps for the REAL DEAL. It is disrespectful to the modelling community to parcel it out in baby steps. If it is "ready" for a "lower line" 7ch. it IS ready for a 9 or module program for existing radios.

    HH is disrescting us and at the same time tooting it's horn. Gotta say, the marketing heads must have gone to the bank already and decided to milk us.

    If you are not milking us, then come clean, and tell us when the modules or 9 or more channel will be available, so we don't waste our money on "lower line" (your words) products. Come clean. Oh, that's right, you need to milk the community for as much as you can, because SS IS then end game, and you see the drop off in sales after eveyone has one.

    I can't believe I am the only one who see's it this way.

    _____________________________

    "Are you brave enough to milk a Yak?"

    (in reply to akschu)
           Post #: 33

    RE: Spektrum DX-7 - 10/22/2006 2:02:03 PM   
    ec121


     

    Posts: 66
    Joined: 1/12/2003
    From: Billingsley, AL, USA
    Status: offline     		The question I have is: Where is the throttle curve for fixed wing planes? Seems like it would only have been a few keystrokes to include the curve in both the heli and fixed wing programs.

    (in reply to Bosshossv8)
           Post #: 34

    RE: Spektrum DX-7 - 10/22/2006 2:15:58 PM   
    air mail rcu


     

    Posts: 522
    Joined: 8/3/2003
    From: Pittsburgh, PA, USA
    Status: offline     		Throttle curve or expo on the throttle for fixed wing would have been nice.

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    Take-offs are optional. Landings are mandatory.

    (in reply to ec121)
           Post #: 35

    RE: Spektrum DX-7 - 10/22/2006 2:32:18 PM   
    Geistware



    Posts: 12946
    Joined: 4/9/2002
    From: Locust Grove, GA, USA
    Status: offline     		Here in Henry County, we have 3 parks or soccer fields within 2 miles of the flying field and many homes are on an acre or more of land. I would not have a problem flying a foamy in my front yard and have trained at least one person who wanted to learn but had enough land to fly once he became proficient in flight.

    I will say most of my club members think that it is not a problem because they have not lost a plane. Waiting until a plane crashes because of interference is waiting too long. I personally have seen two people this year on channel 38 flying at the soccer field in front of our flying field. (1500 feet away) Their fear is that I will crash there plane. Now they promise to look for me first to make sure I don't shoot them down. Turned on my TX and showed them I could make them crash. What would happen if I didn't see this first and open dialog with these guys. LHS are in it for the sale. No caution concerning interference and shooting someone down, just how easy it is to find an open area and fly!

    _____________________________

    Aircraft Proving Grounds
    http://www.rcaircraft.net/
    Information on the building and flying of Radio Control Aircraft.
    Site for hobbyist in the R.C. Aircraft modeling world.

    (in reply to air mail rcu)
           Post #: 36

    RE: Spektrum DX-7 - 10/22/2006 10:54:40 PM   
    lsnover


     

    Posts: 629
    Joined: 4/29/2002
    From: Bath, PA, USA
    Status: offline     		Guys:

    THe other thing that is nice about this technology, is it is not susceptible to electrical interferance like the 72mhz units. So on gas engines with ignitions, and electrics, this is a real advantage. I use the DX6 on my TREXes, and it has worked great. Just wish I had 5 point curves. The DX7 looks to be a good deal for the money, with three digital servoes. I will move this to my DA50 gasser for sure, and I will be getting a TREX600 I hope for Christmas, so this Radio should be about perfect. With the use of a matchbox or two, a 7 channel Receiver will work just fine in just about everything up to 33%. 9 Channels would be nice, but it IS marketing. Spektrum is first, and they are going to milk it for awhile. Eventually, the competition will catch up. In the mean time the DX7 is a nice upgrade from the 6.

    Aside from Glitch prevention, we have a busy field, and it will be nice not to have to wait for a certain Pin. Mine seems to be inevitably being used by the guy with the 4 Stroke Cub pilot who flies for 45 minutes at a time, practicing his side slip touch and goes untilt he sun is just about to go down. ;-)

    I also like to fly at a small field near my home. Its technically too close to our main field, so I was told, no go. The Spektrum has freed me from that limitation, and I don't have to worry about shooting someone down or being shot down.

    I have a Fut. 9Z WC II that will soon be on the market. Technology marches on.


    Cheers!
    Lee

    (in reply to Geistware)
           Post #: 37

    RE: Spektrum DX-7 - 10/23/2006 2:48:53 AM