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ORIGINAL: Sport_Pilot

No you did not quote the part of the FCC explaining primary and secondary, that is prossibly in the definitions section. I presently do not have time to search for that.

The AMA fought to get those 72 Mhz frequencies. Nobody but the FCC controls them. The FCC allowed them to run the gold sticker program to get people moved into the frequencies. So they have some clout, but not control.

I don't think the article said you could not have great range over water. It was that the range would be reduced or non existant, especially over water, in areaswhere there is large interference from other users, both RC and non RC.

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ORIGINAL: TimBle



Yes this has happened to me once. I bound a Rx to the Tx using a battery that had no capacity remaining i.e. it was too low on voltage.
The Rx unbound. I repeated the exercise with a fresh battery and it bound nd has remained that way ever since.

Warbird, I have had experience of surgical implants affecting radio transmission.
One incident was in a EMI testing facility when a colleague walked in while the facility operators was calibrating the EMI chamber.Everything went haywire.
the other was at a flying field when a woman with large implants stood beside her husband in front of a mate of mine while he was flying his plane. His plane started glitching but recovered after a few seconds.

Standing joke : Planes a glitching, b*lls are itching...

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ORIGINAL: warbird72

I do have mussle spassans tingeling in my arms.. I can't sleep at night either.. As far as the check out on the radio.. I checked it right out of here.. I then bought the first 7c 2.4. I bought it new from tower then had to send it back due to a bubble in the lcd.. But I do have 4 other 72 mhz systems all Futaba. ch 48 and 55. It's crazy I set up the plane on the 72 band walk around and glitch glitch bind. It acts as there is someone else on the same channel as me.. But I do have a scanner and on any given day no one else is on. Heck no one is on where I live.. But when the plane does this I hand the tx over to my girl and she can walk out of sight with no trouble at all. Then she will walk back I walk in between her and the plane full down and or full left or right aileron. I mean a full lock. It has striped gears because of this.. I take you have heard of this ??

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The reason is what I was told is the phone companies owns the rites of the 2.4 band and when they start to complain it could be a major issue with the AMA and the FCC.

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The 2.4GHz radio's that we use in this hobby will be a thing in the past soon enough I was told.

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ORIGINAL: Dave


The 2.4GHz radiation behaves MORE like visible light, so we have to think of reflections and shadows. Flying a 2.4GHz radio control model over a reflective surface like water, snow, ice or wet terrain negatively affects the radio link. OCCASIONALLY a 3D aerobatic model plunges into water while hovering. When the rudder is near the water surface, the prop wash creates a chaotic wave pattern which generates a myriad of false-signals.

The reason why microwave oven operates on 2.4GHz is that this frequency excite the water molecules best. Since the human body contain plenty of water, it is possible that the person between the pilot and the model may cause interference as SPORT PILOT described.

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What people call Cell Phones are really wireless phones. Cell Phones are satellite connected and they are bulky.

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ORIGINAL: BalsaBrkr


Is your thesis that 2.4 will be cleared for cell phones? Does this include cleared of wifi? If so, I can't imagine how it could possible be true. On the other hand, if the FCC has a desire to slow the propagation of devices by more narrowly defining use in this currently non-licensed spectrum that could be plausible. I can't for a moment imagine how existing devices would be precluded from operating given the sheer quantity (of baby monitors etc). Regardless, wouldn't there be a publication of proposed rule making and request for comment?

There is also unlicensed space at 5ghz, is that what you are talking about? Are you suggesting a prohibition of 2.4 for RC (and if so way in the future or soon)?

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2.4 is ISM which stands for Industrial, scientific, and medical. So I suppose they could be cracking down on RC use as well as many other uses of 2.4 Mhz.

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ORIGINAL: Silent-AV8R

Makes you wonder how this works:

http://www.youtube.com/watch?v=yMQLn...layer_embedded

Sure, the range is fairly short, but LOTS of water, ripples, waves, spray, and right on the surface to boot. Very typical of a race and 2.4 has proven to be very robust in these situations.

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ORIGINAL: warbird72

Hey guy's I just called Hitec.. I talked to Tony.. I hope Mike gets on here and clears this up. He is a good guy and very heplful.. Hope this eases some minds..

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Sport_Pilot

Not a telecommunications expert, but I thought that cell phones were called that because the tramsmitting, recieving stations worked a small areas called cells, as you move about the services are transfered from station to station. Satelite phones do not use these cells.

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ORIGINAL: TimBle

Oh no, prepare for the Hitec sales pitch <slaps forehead>

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ORIGINAL: Oberst


Why, only for him to be dishonest? He's only going to do what ever he can to protect the business. I doubt that he's studied electronic physics like some people I know. Heck, I doubt he even studied electronic physics 101.

Me I studied all about the 2.4GHz and different Mhz systems when I worked for AT&amp;T. I had to attend classes in order to sell phone and landline systems and I had to a get 90% ot better to qualify in my field.

What Dave Horvath and I have written was based on knowledge, more so from Mr. Horvath. I didn't study electronic physics, but I do use common sense and good judgement from what was taught to me when I was at AT&amp;T.

Why the RC boats work with the 2.4GHz is because the operation distance isn't like how we operate our planes. The spectum antenna is above water and isn't submerged. The hull of these boats are made of a different material and antenna is perfectly sealed.

Again it's like comparing apples to oranges.

No, the wireless phone system connects to a tower, then sent to the recieving stations tower using the 2.4GHz on the G system. The Cell phone and old pagers works under the MHz band to a towered recieving station then up to the satellite. Think of it as a triangle network. Usually they operate on MHz clusters to either Cell Sector A or B at the recieving station inorder to connect with the satellite. We stopped using Cell technology in the 1980's then went to TDMA devices at around 800MHz.

At the same time we went to TDMA the local towers then started to brodcast the MHz signals to the recieving stations tower and no longer connected to a satellite for communications speeding up the connection. When we went to CDMA, the radio signal was intensified as a result speeding up the radio waves. TDMA was even faster but had a tendancy for interference.

When the phone companies switched to a G network, G= Ghz, we no longer used the MHz for signal and went to the 2.4GHz. With the 2.4Ghz signal speed was inhanced and other applications like Wifi, text messaging and data plans could be operated at a faster transmit speed. Aka light travels faster than radio waves.


I think I can speak for Dave Horvath when I say we only are warning people so people don't crash their planes because of a faulty RC system. If we didn't care about our fellow modelers we wouldn't be waisting our time. For me and Mr. Horvath it wouldn't be right not to warn people of what we know. We are not getting paid by anyone so we are not tarnished by any corporate influances. We do it because we know it's the right thing to do. Why? Because we care. That's why you are getting faced with the truth. Anyone from Hitec, Futaba, Airtronics and JR will not tell you the truth. Why? Because they have a lot at stake financially including the AMA.

Follow the money people and use your common sense and put 2 and 2 together. Please! We are supposed to look out for one another in this hobby and not listen to those who makes a living off this hobby. They are there to sell and make money including moderators at RCU, without marketing and promotion RCU would be in trouble financially.


Pete

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No, the wireless phone system connects to a tower, then sent to the recieving stations tower using the 2.4GHz on the G system. The Cell phone and old pagers works under the MHz band to a towered recieving station then up to the satellite. Think of it as a triangle network. Usually they operate on MHz clusters to either Cell Sector A or B at the recieving station inorder to connect with the satellite. We stopped using Cell technology in the 1980's then went to TDMA devices at around 800MHz.

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ORIGINAL: TimBle

the beauty of progress is that it takes care of itself. No fear mongering necessary

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ORIGINAL: Oberst
Aka light travels faster than radio waves.

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I think I can speak for Dave Horvath when I say we only are warning people so people don't crash their planes because of a faulty RC system. If we didn't care about our fellow modelers we wouldn't be waisting our time. For me and Mr. Horvath it wouldn't be right not to warn people of what we know. We are not getting paid by anyone so we are not tarnished by any corporate influances. We do it because we know it's the right thing to do. Why? Because we care. That's why you are getting faced with the truth. Anyone from Hitec, Futaba, Airtronics and JR will not tell you the truth. Why? Because they have a lot at stake financially including the AMA.

Follow the money people and use your common sense and put 2 and 2 together. Please! We are supposed to look out for one another in this hobby and not listen to those who makes a living off this hobby. They are there to sell and make money including moderators at RCU, without marketing and promotion RCU would be in trouble financially.

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ORIGINAL: Sport_Pilot



Sorry this is about politics. You don't get a frequency allocation by siting on your ass and hoping for progress. There is a lot of competition for radio frequencies.

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