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HelicopterRadio - Spektrum DSM › My experience with the DX7 spread spectrum radio
11-11-2006 06:15 PM  10 years agoPost 21
stickyfox

rrKey Veteran

Rochester, NY - US

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I don't want the DX7 thread to get off topic but I'd appreciate if you could comment in the one I'm starting (in the radio section), Augusto.

-fox

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11-11-2006 06:16 PM  10 years agoPost 22
Dr. Fibinotchi

rrKey Veteran

Sioux Falls SD

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excellent write up

Loved the write up. I always hated the 9z and 4point ccpm as well and was the reason went to 3 point.

Looking forward to using this.

-Cody

If you want others to be happy, practice compassion. If you want to be happy, practice compassion.

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11-12-2006 12:42 AM  10 years agoPost 23
Augusto

rrElite Veteran

US

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How is stick feel compared to the 14mz?
The stick feels pretty good. I think the release version comes with ball bearing gimballs.

Augusto.

Avant Aurora Ultimate

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11-12-2006 01:01 AM  10 years agoPost 24
tchavei

rrProfessor

Portugal

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Thats nice


--------------------
"Perfection and patience usually walk side by side..."

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11-12-2006 01:34 AM  10 years agoPost 25
helihobbit

rrApprentice

Dublin, Arizona

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Hi Augusto
do we get to hear whether the DX7's encoder has any resolution issues compared to the 14MZ? It has got to be a much more relaxing radio to fly, because of increased safety. I am inclined to put this feature far ahead of better resolution, what about you? I was nearly shot down a year ago by a newbie who switched his PPM radio on while I had the peg. Got real jerky, but luckily I survived with only minor staining. Would not want a rerun, thats certain. And will the Tx drive a DX6 receiver? I would rather use the simpler lighter Rx for indoor/park flying.

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11-12-2006 02:01 AM  10 years agoPost 26
Tioli

rrVeteran

Kona, Hawaii

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The DX7 radio DOES run the DX6 parkflyer receiver, though not vice versa.

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11-12-2006 02:10 AM  10 years agoPost 27
Yug

rrMaster

UK. Herts

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Polarized antennas sounds like a good fix. When I was playing around with 2.4Ghz video downlinks, when the heli came between the antenna and the receiver, the signal would readily break up with its 125mm wavelength. It would be interesting to see how the DX7 system coped in the vicinity of mobile phones and microwave transmission links.

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11-12-2006 10:44 AM  10 years agoPost 28
stanc

rrKey Veteran

Conroe, TX

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I fly a eRaptor 50 and a Xero G 600EP, both with AR6000 receivers and the DX6 in a 6102 TX and I fly next to a cel tower. Never an issue of any kind. Its nice to go to a fun fly and not have to impound your radio. I will be buying a DX7, supposedly the programming is that of a 8103 TX and has a couple of features the new 7202 doesn't have, like a count down/count up timer.

Stanc

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11-12-2006 07:31 PM  10 years agoPost 29
porscheaddict

rrNovice

Cornwall, Ont. Canada

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I have DX7 on order already
Thanks for a great write up. But I do have a question and any one can chime in here. I would like to know if the DX7's main receiver would fit the frames of mini helis such as X-400(MX) and the Trex 450's? In Agusto's pics the main receiver appears to be quite large.
Chris.

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11-12-2006 07:55 PM  10 years agoPost 30
JKos

rrProfessor

Redondo Beach, CA

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> In Agusto's pics the main receiver appears to be quite large.

Paul posted these measurements for the AR7000 main receiver:

AR7000 is 24 x 45 x 14 mm
Weighs 14 grams

So it's about the same size as the Electron 6 (22.5 x 45.5 x 15 mm) if you are familiar with that receiver. The Futaba 146iP is larger at 28.7 x 42.7 x 20 mm and I know guys are using those on the smaller helis.

- John

RR rules!

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11-23-2006 05:21 AM  10 years agoPost 31
Tioli

rrVeteran

Kona, Hawaii

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You can always use the smaller park flyer rx for the small helis, or the DX6 rx. Of course, then we're back to 6 channels...never mind...sigh.

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11-25-2006 12:16 AM  10 years agoPost 32
Yug

rrMaster

UK. Herts

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I've always been pleased with the range check on my helis - about 400 feet with tx aerial fully collapsed. In Augustos original post, he was happy at 30 paces. What I would like to know, is how far does the DX7 range check ?

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11-27-2006 03:37 AM  10 years agoPost 33
JKos

rrProfessor

Redondo Beach, CA

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Yug,
> how far does the DX7 range check ?

The method for range checking the DX6 and DX7 is quite different than any other radio on the market right now. To do a range check, you press the bind/range check button on the back of the tx while walking away from the model. Pressing the button reduces the RF output of the tx by a HUGE factor. You don't have to walk nearly as far away as you do with a 72 MHz system to know if everything is ok.

- John

RR rules!

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11-27-2006 05:26 PM  10 years agoPost 34
Sparky Paul

rrApprentice

Palmdale, cA

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Full power range checking with the DX-6 has shown me a ground range of over 1000'.
Others have gotten 3200'. This is WAY beyond the practical distance a helicopter can be flown to.
In the air, range for large models is beyond sight.

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11-27-2006 05:53 PM  10 years agoPost 35
Yug

rrMaster

UK. Herts

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The range sounds pretty good then. My only other concern is signal shaddowing; with a wavelngth of 125mm, I would think that with the heli in the wrong orientation, the range could be substantially reduced inspite of the 2nd antenna. Question, what length is the cable joining the 2nd antenna module to the receiver ?

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11-27-2006 06:05 PM  10 years agoPost 36
Sparky Paul

rrApprentice

Palmdale, cA

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I bought my DX-6 after hearing about the "range problem"... "park flier only".
I had to try this out myself, and have flown 2 meter gliders to just almost out of sight with it.
Apparently the range restriction was more due to "shadowing"... large objects in the plane could hide the receiver with its short antennae from the transmitter at some distance than any actual problem receiving the signal.
The cure obvious to me was two receivers, spread about a foot apart, sideways... along the wing's span. Either receiver would then always "see" the transmitter, regardless of the orientation or amount of large stuff.. thinking big gas motors or monster Lipo packs.
With the longitudinal layout almost a requirement in a heli, it might pat to put the second receiver on the other side of any large parts in the bird.
Or on outrigger wings, like weapons pylons.

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11-29-2006 02:24 PM  10 years agoPost 37
Barney

rrKey Veteran

Inverness Scotland

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How would using a Tx mit effect the range if at all?

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11-29-2006 02:35 PM  10 years agoPost 38
Yug

rrMaster

UK. Herts

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Probably a bit, depending on what it's made of

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11-29-2006 04:44 PM  10 years agoPost 39
doorman

rrProfessor

Sherwood, Arkansas

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Who the H** Highjacked This Post???

Opp's must be the medication....

AMA 2918-Team JR, Spin Blades, East Coast Scale Helicopter,Castle Creations

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11-29-2006 05:06 PM  10 years agoPost 40
JKos

rrProfessor

Redondo Beach, CA

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> How would using a Tx mit effect the range if at all?

Since the antenna would stick out the top of the mit just as your current antenna does, it should have very little to no effect.

- John

RR rules!

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HelicopterRadio - Spektrum DSM › My experience with the DX7 spread spectrum radio
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