[NSRCA-discussion] New JR Radio (was Spektrum DX7)

Mon Jan 8 16:27:20 AKST 2007

there's a lot of stuff comming out soon...

Nomadio is preparing to release a 16 channel 2.4 ghz radio With some impressive features...  Search for thier post on RCGroups

Polks is working on thier Tracker-IV which is going to be a good mid-range radio from what I have heard from them (might be 72 mhz and 2.4 ghz versions... and they are also considering being totally different on 900 mhz)

If looking for just a backup to fly practice while the other is in for service, and your current radio is working for competition.... I'd go with the minimum that will serve and plan to sell it to a beginner, then wait for the new releases over the next year.

If you have contests to fly... and need the "old" 10X serviced.... its a real toss-up what to do.

I could probably bennefit moving up from my Tracker-III, which I am still learning how to make do more things (and I just told Polks how to make it do another thng they said it can't do)... but had no multipoint curves and no CCPM pre-programmed, and I'm "playing with" helis...

but I think the radio market is going to change and its a bad time to buy. 

  ----- Original Message ----- 
  From: Keith Black 
  To: NSRCA Mailing List 
  Sent: Monday, January 08, 2007 6:30 PM
  Subject: Re: [NSRCA-discussion] New JR Radio (was Spektrum DX7)

  This reminds me of something I heard the other day from a fellow pilot. He was told that JR has a new 12 channel radio out now but Horizon chose not to carry it. I saw this radio on a Japanese link a while back and assumed they just hadn't offered it to the US market yet. But if my info is correct JR did offer it to the US market but Horizon was the road block. 

  Does anyone know if this is true?

  If so I wonder if it's because it's a PCM radio and Horizon's waiting for a Spektrum version? The one on the Japanese web site was labeled as PCM.

  Has anyone heard anything about new JR radios on the "Horizon" ?  I'd like to buy a new one and get my 10X serviced and use it as a backup but I don't want to buy another 10X with a new model coming out soon. 

  Keith

  On 1/8/07, jonlowe at aol.com <jonlowe at aol.com> wrote: 
    Ron,
    Here is what I posted on RCU after using my Dad's DX7 over the holidays.

    ==================================================================== 

    I've been working with my Dad's DX-7 all day, trying to get the Arresti
    III I gave him set up. I'd previously set this plane up with a 10x, so
    I can give a fair comparison.

    Servos track more or less the same as with the 10x. If you use too much 
    subtrim, they won't track, just like a 10x. The servo matching servo to
    servo is still the biggest variable. Minimize subtrims, and they track
    well, same as the 10x. Didn't have problems with latency with the 10x, 
    this seems no better or worse. And, yes, I've seen horrible latency in
    other systems.

    Several things the DX7 doesn't have that makes it not very friendly for
    pattern usage:

    No variable trim rates. Easy to end up between trims, and the trim rate 
    is very course.

    No throttle curve. I've made a quasi curve using the suggestion Pizza
    came up with, but it doesn't substitute for a real curve. This is a
    biggie in my book.

    No conditional mixes. I use a rudder to rudder mix to get a higher rate 
    for stall turns switched with the throttle stick at low throttle.
    Doesn't appear possible on this.

    No origin mixes.

    No built in mix for knife edge. Uses two separate mixes to do it. The
    lack of origin mixing can affect these. 

    No multipoint mixes.

    No split expo rates so you can get different rates for, say, up and
    down elevator.

    No built in mix for two elevator servos. Only two mixes include a trim
    function, so you use one up to get this. Why EVERY computer radio 
    doesn't include this is beyond me, given the number of two servo planes
    on the market.

    No snap switches. I use them only for the avalanche, as I can get
    better timing this way.

    Sticks were the softest I've seen, even when set full stiff. A set of 
    HD springs helped. Sticks are smooth though.

    Transmitter doesn't balance well at all on a lanyard, being very bottom
    heavy due to no antenna. We added a lanyard hook extension helping this
    a lot. This is a chronic problem with JR radios, and the lack of a long 
    antenna just makes it worse.

    This is a sport radio, and as long as you don't expect more from it,
    you will be ok. If you are used to a full function radio, especially
    one as easy to program as the 10x, you will get frustrated quickly. 

    Just my $.02.

    =========================================================================
    =

    It works very well, solid link, no range issues.  My Dad has gone back
    and forth between this and his 10x; he flies with zero expo and pretty 
    high rates all of the time, and the plane feels basically the same to
    him either way.  He is VERY sensitive to latency and responsiveness.
    Bottomline, other than eliminating frequency conflicts, I see no real
    reason to buy a DX7, and lots of reasons why it may not be suitable for
    a lot of pattern flyers.  I'm waiting for a module for my 10x or a high
    end radio from them.

    Jon

    -----Original Message----- 
    From: vanputte at cox.net
    To: nsrca-discussion at lists.nsrca.org
    Sent: Mon, 8 Jan 2007 2:23 PM
    Subject: [NSRCA-discussion] Spektrum DX7 

    Has anyone "with credentials" made an evaluation of the Spektrum DX7
    for precision aerobatics?   Please don't feel maligned if you're one
    of many of us who might not be able to tell the difference. 

    I've heard from several accomplished helicopter pilots that the DX7
    is superior to what they have been flying with.  They keep talking
    about "feel".  What's the story on precision aerobatics? 

    I understand that the DX7s frame rate has been quoted by different
    sources as being "more than a Futaba 14MZ" and, alternately, "less
    than 1024".  I don't know who's right.  Frankly, I can't tell the 
    difference between 512 and 1024, but that's me.

    Ron Van Putte

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