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

[Keith Black]

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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