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Sep 05, 2006, 02:12 PM
Thread OP

XtremeLink™ - 2.4GHz for Futaba, JR, and Hitec radios

We are pleased to announce that we will be releasing a new product in the near future that will allow you to upgrade you exiting Futaba, JR, and Hitec radio systems to 2.4GHz.

Our system replaces the existing transmitter RF module and includes a brand new receiver.

This is a professional upgrade, not a park flyer upgrade. Our system offers up to 5 miles of range, no frequency conflicts, the ability to have up to 390,000 people flying at the same time, and gives you the option of having telemetry data.

Information and pictures of the prototype units are on our website.

The telemetry system interfaces to the receiver. The telemetry sensors are all daisy-chained together (each unit plugs into the next, with the last unit plugging into the receiver). We are going to release the information on how the interface works so that anyone can create their own sensor. The interface is serial, with a special protocol and packet structure. We will be providing complete PIC micro assembly source code for a sample sensor. It will be easy to simply add a sensor and pass the data to receiver using the provided code.
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Sep 05, 2006, 04:03 PM
Budget price?
Sep 05, 2006, 05:02 PM
Thread OP
MSRP for the "flight pack" will be $179. This includes your choice of transmitter module (JR, Futaba, or Hitec) and one 8 channel receiver. MSRP for the 8 channel receiver will be $99. MSRP for the 10 channel receiver will be $119, and MSRP for the 16 channel receiver will be $149. MSRP for the telemetry system will be $129. Additional sensors will vary in price, depending on what they are. Considering a good 10 channel PCM receiver is right at $200 street price, this system is quite a bargain, besides having its numerous other advantages.
Sep 05, 2006, 05:30 PM
Registered User

Rx antenna questions?


Sounds like a great product. A few questions if you have the time:

Will the rx antenna for the receiver work in carbon fuselages?

Can the rx antenna be mounted on a shielded extension cable away from the receiver electronics?

Does the rx antenna have to oriented vertically or can it be mounted horizontally to reduce drag?

-John Elliott
Sep 05, 2006, 05:36 PM
Registered User
Nice idea, and not a bad price, especially if it includes the downlink.
A few questions...

Is there an option to mount the receiver aerial inline with the receiver, rather than sticking out like that?

How are more receivers bought, is there a unique code that we need to send to you, or can it be configured to different transmitter modules? Is that what the program button on the receiver does?

Is there any interference from all the other 2.4GHz users? How does someone with a wireless network impact on those 390 000 available modules?

Any idea when you're thinking of getting CE approval ?

Is B/TM the downlink module input?

How do you extract the telemetry from the "transmitter"? Or is that another module?
Sep 05, 2006, 05:49 PM
Registered User

It looks like some of my questions about Rx antenna mounting have been
answered in the other forum at:

-John Elliott
Sep 05, 2006, 06:07 PM
Thread OP
We already have CE approval.

There are not 390,000 modules available. You can have up to 390,000 modules in use at the exact same time! There is 1 in 18.664 quintillion chance of having a "frequency" conflict, and that is only if we sold that many receivers + 1.

There will be an option to mount the antenna remotely, but it is HIGHLY unlikely that anyone would ever need it. It "sticks out" only 1.2".

B/TM is the battery/telemetry interface for the receiver. The transmitter module has a plug inside of it for the telemetry control unit. It sits on top of your transmitter, mounted in the old (and now unused) transmitter antenna hole. There is a cable that connects the telemetry control unit and the transmitter module.

The receiver can be mounted anyway you like.
Last edited by JimDrew; Sep 06, 2006 at 09:43 AM.
Sep 06, 2006, 05:05 AM
Registered User
Geoff_S's Avatar
Any plans for a module to fit Multiplex MC4000 radios ?
Sep 06, 2006, 06:24 AM
Registered User
CE Approval: great

I figured that wlan and all the rest of the 2.4GHz things would take up bandwidth, meaning you get less than 390,000 simultaneous modules. Although if there are a third of a million planes in the sky, wlan is the least of your concerns.

Still not sure how you select "channel" ? Do you make sure you are the only transmitter in range and press the program button on the receiver?
Sep 06, 2006, 09:36 AM
Thread OP
The transmitter and receiver are bound together so that only they will talk to each other. If you have multiple receivers (multiple R/C aircraft, cars, etc.) you can use a single transmitter to learn all of the receivers. There is a rather large portion of 2.4GHz that is reserved specifically for ISM and does not conflict (frequency) with other 2.4GHz devices (like the Spektrum radio system).
Sep 06, 2006, 12:59 PM
Registered User

Whats the real range (at 50mW and 100 mW output power)? 5 mile is the theoretical range in the perfect condition ..

Nevertheless I see that your Maxstream RF module use frequency hopping. That a really good thing to reduce interference at minimum.

Sep 06, 2006, 03:55 PM
Thread OP
100mw is 5 miles air <> ground, unobstructed. 50mw is a little more than 1/2 of that.
Sep 06, 2006, 04:17 PM
Registered User
Did you do some real field test or that the number from Maxstream ? Even at 100mW I really doubt you can have a range of 5 mile. Mainly because of the frequency used (2.4Ghz).

Anyway your product look great and considering the technology I think the price is fair too!

Sep 06, 2006, 05:51 PM
EDF all the way!
bruff's Avatar
Any news when you are talking pre-orders?
PS Hope to see you at the 2007 Arizona Electric Festival
Sep 06, 2006, 06:20 PM
Thread OP
The numbers come from a combination of real world field testing to verify the paper numbers. I flew a foamie to 4947 feet (yes, out of site), and was able to bring it back with no problems. Realistically, nobody is going to go that high without binoculars strapped to their head.

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