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Old Apr 15, 2007, 01:40 PM
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Ottawa, Ontario
Joined Apr 2007
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Question
Can SPEKTRUM DX-7 or DX-6 stop my heart? no joke

Trying to find out the true output in watts at the antena for the SPECTRUM 2.4GHZ Radios ... Need true accurate watts for health reasons.
Can`t use any radio above 300 milliwatts output or it can interfere with my defribulator /pacemaker. Looking to change all my radios to 2.4 GHZ
Hope i can stay in the hobby

Yes i`m only 36.
Can use cell phone( 300 milliwatts ) @ 6inches away from unit but i think most 72 MHZ radios are 750 milliwatts to 1000 milliwatts .

Help
Thanx in advance
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Old Apr 15, 2007, 01:44 PM
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Ottawa, Ontario
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Thx
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Last edited by Fuzzbuster; Apr 15, 2007 at 01:52 PM.
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Old Apr 15, 2007, 01:54 PM
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The XPS 2.4Ghz modules are listed as 100mw (max power) with an approximate 60mw from the transmitter final amplifier (the rest must be gain from the antenna). So in theory you should be safe. Can you safely use a wireless network card in a laptop computer? They should be about the same power level. I think Futbab has the specifications listed for their 2.4Ghz stuff, but I'm not sure about the Spektrum/JR stuff.

The choice between the DX6 and DX7 might also come down to the DSM not being supported with the Spektrum modules, only DSM2 (if my memory is correct).

I would definitely send a message to Futaba, Spektrum, and XPS to get their more informed opinion on the RF level matter. It might come down to you buying from the only one that replies!

edit I just remembered that the XPS user manual says you can reduce the power down to 10mw from the transmitter, so not more than about 25mw from the antenna.Should be fine for park flyers and some heli use.
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Old Apr 15, 2007, 01:57 PM
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Your best bet for reliable information is to contact Spektrum directly.
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Old Apr 15, 2007, 01:58 PM
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Ottawa, Ontario
Joined Apr 2007
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Thanx for that on the SpeKtrum output
Have called customer service @ Futaba and Spektrum but Answers vary from operator to operator ...almost would have to speak to Engineer or have radios tested by someone?
Don`t know what kind of tech would be able to help me
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Old Apr 15, 2007, 02:00 PM
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http://www.xtremepowersystems.net/data/XtremeLink.doc

Here is the link to the user manual for the XPS modules. That and a nice Futaba 9C radio should get you more than you might need, and give more programming than the DX7
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Old Apr 15, 2007, 02:02 PM
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Well since Jim Drew, one of the enginners of the XPS system posts here, maybe he will find this thread when he returns from Toledo and chime in.

The last dozen or so posts in the current XPS thread are talking about the power output.
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Old Apr 15, 2007, 02:05 PM
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Any way of getting dirrect message to him?
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Old Apr 15, 2007, 02:07 PM
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According to everything I have read, the DX6 puts out 10mw, and the DX7 puts out 100mw or less... (Some places do say the DX6 is 100mw, some say 10mw) In fact its my understanding, based on everything I have read about 2.4ghz, that the band is limited to a max of 100mw....
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Old Apr 15, 2007, 02:13 PM
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Ottawa, Ontario
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If that`s the case I should be more than safe with any 2.4 GHZ radio
Just can`t go to any flyins and such anymore to be safe
At least till everyone moves to 2.4 GHZ band.......ya right, far far away.....
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Old Apr 15, 2007, 02:20 PM
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I know for a fact that some modelers with pacemakers regularly fly R/C on 72 mHz with normal power transmitters...you might want to research the situation a little deeper.
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Old Apr 15, 2007, 02:34 PM
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Do a range test close to a hospital if you buy the DX7.
There is a lot of controversy on power output bcause spektrum has never given out the numbers.
http://www.rcgroups.com/forums/showp...&postcount=418
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Old Apr 15, 2007, 02:37 PM
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That must be the reason i`m geting different answers from alot of people?
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Old Apr 15, 2007, 02:38 PM
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I would try contacting XPS through their website http://www.xtremepowersystems.net/
They would be fools to ignore such a request since thats just what Futaba and Spektrum seem to be doing by giving you many different answers. Being able to turn down the power to 10mw might give you some small amount of comfort too (in the user manual).
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Old Apr 15, 2007, 02:45 PM
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Also, what is the distance for that 300mw limit that you have? For an omnidirectional antenna, the power drops off inversely to the square of the distance (inverse square law). So you should be safe at flyins as long as you do not stand too close to anyone using a transmitter. You could do the math, but 4 to 5 feet (1 to 2 meters approx) should be safe. if they are runing on a HAM band, then that may or may not apply since I don't know what kind of power those are allowed to run.
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