RC India

Interesting...

http://www.rcpak.com/index.php/forum/52-general-discussion/6652-re-jr-ditching-spektrum-the-saga-continues

Looks like every other radio manufacturer went with FHSS from day one for a reason !

Here is the FHSS equivalent of the Spectrum/DX7 from JR.

http://www.rcgroups.com/forums/showthread.php?t=1327478

Interesting to see the Futaba style dual long antennas.

Yes i heard that but Jr will continue to work with Spektrum for the DSM2 technology. JR has been producing FHSS for quite long time as in Japan & Europe were DHSS is not allowed, i have seen these system on the JR's Japanese website.

Currently there is a lot of debate on DHSS & FHSS 2.4 technology & which is better. I will say each technology has its advantage & disadvantages & both have failed some time or the other without any explanations... :(.

Not Europe, only Japan where they brought out DSM-J.

About failure, like Sushil bhai pointed, it is about percentages.

What i personally i don't like about the DSM2 is the satellite receivers hanging in the fuselage.

Looks like Spektrum is also coming up with something new, called DSMX.

http://www.youtube.com/watch?v=QaoXipp_288

Haha... so they are also going to jump around various channels, like Futaba, Airtronics etc !  Although it took them a while to acknowledge and however twisted they present their NEW technology, it seems like a frequency hopping system ;)

http://modelflight.blogspot.com/2011/02/introducing-spektrum-dsmx-true.html

i was goin to put the ssme video :P :P :P :P :P

You see a recent Jet plane crash at Nagpur was using a 2.4 Futaba so you cant say, FASST can also crash & for those who say "a dry solder" or a "battery problem" I think the probability is less.. ;D

Spektrum will continue with the DSM2 technology as for now, They have not stated that they will stop the production.

I think you really need to read some other threads on this forum, about FASST crashes (the heat issue being the primary one). 

What I am talking about is "percentage of issues", where DSM2 seems to be the leader now ;)

http://www.rcindia.org/for-sale/futaba-14-ch-rx/msg35917/#msg35917 

This is a comment from someone else, who has done some reading before making a purchase decision.  You can see many DSM2 "skepticism" threads on the US forums, much more in comparison with Futaba, and hardly anything for Airtronics and Hitec.

Look at it this way. Futaba, Airtronics, Hitec etc have not changed their basic RF architecture since they started.  Both JR and Spektrum have... does that tell you anything ?

Here is the latest !

http://www.rcuniverse.com/forum/m_10307840/anchors_10307840/mpage_1/key_/anchor/tm.htm#10307840

Post #13 is worth highlighting !

Please also look at post #23, 24 & 29.

Today's radios are great irrespective of any brand. And there is no guarantee that any of the brand will not malfunction.

Pick what you like, be safe and play around.

Thanks

Arun

In general, yes.  But when you get into specifics, there are percentages/statistics (which can be "damn lies" ?), and the fact that JR/Spektrum technology is being "overhauled".  These do matter !

I was also unable to decide whether to go for Futaba or JR 7 channel radio a year back when I wanted to get into this hobby. Price was not a factor at all as both systems were offered to me at 17K. I did my research and didnt find anything wrong with either brands. My decision to go with the JR was purely cosmetic.

I would suggest whatever be the brand, go thru the manual and setup accordingly rest assured you will have no problems. I have mentioned this because I have seen many people putting the receiver completely wrapped in foam for the fear of crash. The antenna is no where to be seen at all. The wrapped up receiver is stuffed in to the plane fuselage. Please note that here I am not talking about some newbies but people who are there in this hobby for a long time. Whereas it is clearly mentioned how to install the receiver in the manual, but who cares, finally one crashes the model and curses the radio.

I totally agree!!!!! everything evolve so do spectrum .....

Show me a top world class sponsored pilot who has crashed his airplane on a 2.4 radio...

Come on... are we naive enough to expect top pilots (many of whom are sponsored by radio companies) to divulge such information ? 

Even then, here is one (heli though), and I am sure if one searches enough, there would be more.

http://www.youtube.com/watch?v=4DlcZSldNZE

If you are in the market for a radio, do a bit of homework, that's all.  It does not really matter to others what conclusion one arrives at !  There are tons of people who are happy with their brands of 2.4Ghz. 

I for one, will NOT buy a DSM2 system, having seen the discussions in the past year or so. But that is just me :) (and may be Sushil bhai).

I am not more talking about the DSM2 in fact i personally like the Airtronics & Hitech 2.4 more than any other brand their review is good far better than fasst... ;D

And I was talking ONLY about DSM2 ! ;D

Regarding Aitronics and Hitec in comparison with FASST, I have been very very clear :) The only confirmed issue with FASST was the temperature issue, which was fixed "quietly" though !

http://www.rcindia.org/radios-and-receivers/advantage-of-using-2-4ghz-hack/msg33477/#msg33477
http://www.rcindia.org/radios-and-receivers/question-on-2-4g/msg4006/#msg4006

PS: And you did ask for "2.4Ghz radio" !

JR is stopping DSM2 sales, for upgrade to DSMX.

Reply #23 on this thread is rude :)

http://www.rcuniverse.com/forum/m_10337656/anchors_10337656/mpage_1/key_/anchor/tm.htm#10337656

Anwar Bhai this reply is a Truth and truth is always bitter, and straight forward.

I have just seen Horizon site, This what they have to say "DSM2 and DSMX share the same wide-band DSSS foundation".
Probably the change is not very big, but some tinkering with software/firmware.

The receivers and Transmitters of both DSM2 and DMX are compatible.

Link is here: http://www.horizonhobby.com/DSMX/#what

The change is significant, if you look at the details.  They changed their transmission method to something very very similar to the one Futaba uses.  The backward compatibility is preserved for the sake of customers, that does not mean change is minor.  To get the benefits of DSMX, both the TX and RX have to be DSMX.

They are programing even old DSM-2 radios to become DSMX, that simply means they are just upgrading firm ware to rectify flaws of DSM2 system, as there were concerns with DSM_2

http://www.rcmodelreviews.com/dsm2flaw.shtml

http://www.rcmodelreviews.com/dsmx.shtml

and probably they are coming close to FAAST as far as Frequency hoping is concerned.

Ya you are correct Anwar Bhai change is significant, hopefully.

long time... for me here.   it seems that JR has taken a back seat for sure. all the products 2.4 ghz are to be upgraded. some free most paid. but only the TX your RX collection cannot be done. that money is gone.

some vendor sites has not posted any information about this.

for a prudent country like India, moral of the story is not to buy any spektrum / JR if you plan to stay an aeromodeller for long.

for me i have taken a short break (pause ) even though i am flying once in a while with some one else's models. i have a JR and fortunately i have MHZ band. many times i have thought of going for JR 11X0, but postponed the issue. i dont have money to waste on disputed tech ( like JR ).

sadly i will go in for Futaba 2.4 , that's for sure as i plan to build my system of keeping many RX and a couple of TX's etc.

so all my new RC equipment is definitely going to be futaba all the way.

any one buying spektrum /JR from existing stock is buying already dead tech product as all the current stock has been withdrawn by JR esp in USA.  

by the way DSMX is Just Futaba FHSS as you can understand that JR will die if they also call their Tech FHSS. So its only FHSS all the way.

So can i expect JR to come with telemetry radio for surface contents like Spektru DX3S series

All low end futaba car radios have shifted to FHSS ie 3PL, 4PL etc. The higher end ones like the 4PK-S still use the FASST tech.

We have noticed that FHSS has much better range than the Spectrum DX3r/s etc as well as fewer glitches.

So i guess its a good move to move to FHSS.

I don't think the JR DSMX is a FHSS technology if it was so then DSM2 would not have been compatible with the DSMX it clearly says DSM2 transmitters are forward compatible with DSMX receivers and DSMX transmitters are backward compatible with the DSM2 receivers. And because DSM2 and DSMX share the same wideband DSSS foundation, all Spektrum users will enjoy superior range, speed and precision whether they're using DSM2 equipment, DSMX equipment or a combination of both.

The Spektrum DSM2,  DSMX technology & the FHSS are the two different types of 2.4 ghz technology.

From what I understood, DSMX is FHSS ("frequency agile DSSS",  seems to be the right name).  The compatibility should not confuse you. The transmission is DSMX (FHSS) only when the receiver is DSMX, otherwise it falls back to DSM2. 

Guess you did not go through the links here on what the issue was with DSM2, and how DSMX tries to fix it via hopping (i.e. being "frequency agile").

http://www.rcindia.org/radios-and-receivers/jr-going-completely-fhss-parting-with-spektrum-dsm-dsss/msg50434/#msg50434

Yeah Anwar Bhai, that's right, We can call DSMX as narrow FHSS, or wide DSSS.

Compatibility means that DSM2 receiver would be able to understand DSMX transmitters but with out all the advantages of DSMX, that implies receivers which are designed to work on a narrow spectrum would not be able to give you all the benefits of wider spectrum.

But I think with DSMx it's closer cousin of FAAST or FHSS (it's all marketing Jargon, you know)

Hope my posts are making some sense ;)

All the Best
Akshay

http://www.horizonhobby.co.uk/aeroonline/e6spektrum/e6overview/e6_dsmx_about.html

Finally an idiot has arrived among a bunch of guys discussing something going aboove my head.  :headscratch:
What's the difference between FHSS, FAASST, DSM, DSSS and specturm? Can I use the usual HK's 6Ch Tx with the Rx of the FHSS HK 6Ch? Can I use a futaba radio with a spektrum Rx?  :headscratch:

Vineet

"Search"... it is all here, though not in one/same thread.