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Originally posted by Anon77
If you are within a city or town the mobile will already be operating at a minimal output, The cells are very close together in city's and towns. Out in the sticks... Well that's a bit different. Remember when your phone is showing full signal it is operating at minimal power. Even at high power (low signal strength/only one or two bars) your only talking about 35 milliwatts. A very small amount of power.
Originally posted by Hellhound604
Originally posted by Anon77
If you are within a city or town the mobile will already be operating at a minimal output, The cells are very close together in city's and towns. Out in the sticks... Well that's a bit different. Remember when your phone is showing full signal it is operating at minimal power. Even at high power (low signal strength/only one or two bars) your only talking about 35 milliwatts. A very small amount of power.
erm no, your cellphone puts out in the region of 2 watts at full power, lol.... which is still small in relationship to a TV/Radio transmitter, or a CB, or your microwave oven, or a RADAR transmitter ....
(Class 2 Bluetooth is 2.5 milliwatts (they typical bluetooth headsets), and class 1 (long range, i.e. your laptop) is limited to 100mW))
Originally posted by Anon77
Originally posted by Hellhound604
Originally posted by Anon77
If you are within a city or town the mobile will already be operating at a minimal output, The cells are very close together in city's and towns. Out in the sticks... Well that's a bit different. Remember when your phone is showing full signal it is operating at minimal power. Even at high power (low signal strength/only one or two bars) your only talking about 35 milliwatts. A very small amount of power.
erm no, your cellphone puts out in the region of 2 watts at full power, lol.... which is still small in relationship to a TV/Radio transmitter, or a CB, or your microwave oven, or a RADAR transmitter ....
(Class 2 Bluetooth is 2.5 milliwatts (they typical bluetooth headsets), and class 1 (long range, i.e. your laptop) is limited to 100mW))
Ooops, Lol, Thanks for pointing that out. I was typing faster than I was thinking. 2 watts is still a low power though, And it only produces that in very low signal areas, in a town or city your only talking milliwatts (because of the cell spacing). The older US analogue phones were producing 3.6 watts at peak. I think the newer digital CDMA ones are better. They max out at about 1 watt. I'm still not convinced that this is enough to cause cancer unless you happen to live in the middle of nowhere and have the phone in use 24/7 and glued to the side of your head!
Group 2B: The agent is possibly carcinogenic to humans. This category is used for agents for which there is limited evidence of carcinogenicity in humans and less than sufficient evidence of carcinogenicity in experimental animals. It may also be used when there is inadequate evidence of carcinogenicity in humans but there is sufficient evidence of carcinogenicity in experimental animals. In some instances, an agent for which there is inadequate evidence of carcinogenicity in humans and less than sufficient evidence of carcinogenicity in experimental animals together with supporting evidence from mechanistic and other relevant data may be placed in this group. An agent may be classified in this category solely on the basis of strong evidence from mechanistic and other relevant data.
Originally posted by Hellhound604
Originally posted by Anon77
Originally posted by Hellhound604
Originally posted by Anon77
If you are within a city or town the mobile will already be operating at a minimal output, The cells are very close together in city's and towns. Out in the sticks... Well that's a bit different. Remember when your phone is showing full signal it is operating at minimal power. Even at high power (low signal strength/only one or two bars) your only talking about 35 milliwatts. A very small amount of power.
erm no, your cellphone puts out in the region of 2 watts at full power, lol.... which is still small in relationship to a TV/Radio transmitter, or a CB, or your microwave oven, or a RADAR transmitter ....
(Class 2 Bluetooth is 2.5 milliwatts (they typical bluetooth headsets), and class 1 (long range, i.e. your laptop) is limited to 100mW))
Ooops, Lol, Thanks for pointing that out. I was typing faster than I was thinking. 2 watts is still a low power though, And it only produces that in very low signal areas, in a town or city your only talking milliwatts (because of the cell spacing). The older US analogue phones were producing 3.6 watts at peak. I think the newer digital CDMA ones are better. They max out at about 1 watt. I'm still not convinced that this is enough to cause cancer unless you happen to live in the middle of nowhere and have the phone in use 24/7 and glued to the side of your head!
NP mate, thought as much, or that you thought of Bluetooth instead. The fact is that I have been in RF development for 20+ years, and yes, I have known a couple of RF engineers that have died from brain-cancer, but then, we all worked on high-powered systems (100kW and higher, I myself can show you a couple of serious burns I picked up from RF). I also know a lot of sales-people, that spend like 15++ hours a day with their cell phones glued to their heads, and not a single one of them has developed brain cancer. Us developers always joked that if those sales-guys developed brain cancer, then we will know for sure cell-phones do cause brain cancer.
We accepted is a fact, that some of us, working with very high power systems would develop brain cancer, that is well documented, but no proof for the low powers, like cell phones.
The recent doc that came out, that stated cell phones "might" be carcinogenic, placed it in Cat. 2A, which is the same category as wooden furniture!!!!, petrol, diesel, etc..... I am too lazy to look up the links now, but you can do a search over here on ATS, where I referred to the actual statements, and not an overhyped newspaper article.
Originally posted by Anon77
I can believe in a small amount of localized heating maybe...
Effects of radiofrequency electromagnetic fields (RFEMF) on the pituitary adrenocortical (ACTH), growth (GH), and thyroid (TSH) hormones have been extensively studied, and there is coherent research on reproductive hormones (FSH and LH). Those effects which have been identified are clearly caused by heating. The exposure thresholds for these effects in living mammals, including primates, have been established. There is limited evidence that indicates no interaction between RFEMF and the pineal gland or an effect on prolactin from the pituitary gland. Studies of RFEMF exposed blood cells have shown that changes or damage do not occur unless the cells are heated. White cells (leukocytes) are much more sensitive than red cells (erythrocytes) but white cell effects remain consistent with normal physiological responses to systemic temperature fluctuation. Lifetime studies of RFEMF exposed animals show no cumulative adverse effects in their endocrine, hematological, or immune systems. Cardiovascular tissue is not directly affected adversely in the absence of significant RFEMF heating or electric currents. The regulation of blood pressure is not influenced by ultra high frequency (UHF) RFEMF at levels commonly encountered in the use of mobile communication devices
Radio frequency ablation (RFA) is a medical procedure where part of the electrical conduction system of the heart, tumor or other dysfunctional tissue is ablated using the heat generated from the high frequency alternating current to treat a medical disorder. An important advantage of RF current (over previously used low frequency AC or pulses of DC) is that it does not directly stimulate nerves or heart muscle and can therefore often be used without the need for general anesthetic. RFA has become increasingly accepted in the last 15 years with promising results.[1][2] RFA procedures are performed under image guidance (such as X-ray screening, CT scan or ultrasound) by an interventional pain specialist (such as an anesthesiologist), interventional radiologist or a cardiac electrophysiologist, a subspecialty of cardiologists.
The incorporation of RF coils into the tips of intravascular devices has been shown to enable the localization of catheters and guidewires under MR guidance. Furthermore, such coils can be used for endoluminal imaging. The long cable required to connect the coil with the scanner input inadvertently acts as a dipole antenna which picks up RF energy from the body coil during transmit. Currents are induced on the cable which can lead to localized heating of surrounding tissue. Cables of various lengths were measured to determine if a resonance in the heating as a function of cable length could be found. Coaxial chokes with a length of lambda/4 were added to coaxial cables to reduce the amplitude of the currents induced on the cable shield. A 0.7-mm diameter triaxial cable, small enough to fit into a standard intravascular device, was developed and measured both with and without a coaxial choke. It is demonstrated that resonant heating does occur and that it can be significantly reduced by avoiding a resonant length of cable and by including coaxial chokes on the cable.
Originally posted by nobodysavedme
Everyone who is smart knows that cell phone increases the likelihood of you getting cancer the more you use it.
...
Originally posted by abecedarian
Originally posted by nobodysavedme
Everyone who is smart knows that cell phone increases the likelihood of you getting cancer the more you use it.
...
I must be dumb then.
I've worked on cell sites for 15 years. I have worked in front of live antennae, some of which radiate upwards of 100 watts, for several hours a day, several days a week nearly every week over my 15 years in the field. Your cell phone radiates less than 4W PEP on 2G (TDMA, GSM, EDGE) networks and typically less than 2W on other 2G+ (CDMA) and 3G/4G (UMTS, LTE, advanced CDMA).
To make a physical comparison: typical incadescent headlights on a car operate in much the same manner as the antenna on a typical cell site. The light is much like the radio signal from the tower, though at a much higher frequency. Turn your lights on low and you have approximately 45-55 watts being focused in front of the light. See how far that goes? Now, take your typical incadescent penlight (approximately 4 watts) and shine it out: how far does that go?
TV / FM stations can broadcast in excess of 5000 watts; AM radio can reach 50,000 watts.
The only thing I've developed as a result of working on cell sites seems to be a mild form of Tourette's that is triggered by people spreading rumor as fact.
To answer you question about software: no, there really is none.
However, the firmware / hardware of your phones do vary the strength of the signal automatically. They usually limit the power to the lowest level necessary to communicate with the cell site, and the closer you are to the tower, the lower the power necessary will be.
edit on 2/24/2012 by abecedarian because: (no reason given)
Originally posted by Hellhound604
reply to post by Anon77
Sorry for your dad's RF burn. On an antenna, it just depends where you touch. The weird thing with RF burns is that you don't feel a thing, you just smell something burning. Afterwards it becomes extremely painful, lol....
Originally posted by Hellhound604
reply to post by Anon77
ok, I count 3 RF engineers working with relatively high RF powers, and not one of us has developed brain cancer yet???? Of course, not a lot of people with wooden furniture in their homes, or driving cars (which are also in the Cat. 2B classification) develop cancer either...edit on 24/2/2012 by Hellhound604 because: (no reason given)
Originally posted by Anon77Never worked in front of live links myself. Provided your not working 3 mm in front of it I suspect it doesn't matter at 100 watts on a cell tower because of the fact that the antenna would probably be a sector antenna (not a point source since it's about 120 degree horizontal and +/- 5 - 10 degrees vertical coverage i think?) I'd be more concerned working in front of a powerful point source antenna because of the attenuation of power with the square of distance.
Didn't realize there were so many RF engineers on ATS.
Originally posted by Anon77
Originally posted by Hellhound604
reply to post by Anon77
Sorry for your dad's RF burn. On an antenna, it just depends where you touch. The weird thing with RF burns is that you don't feel a thing, you just smell something burning. Afterwards it becomes extremely painful, lol....
Thanks, That's pretty much what he said too. I don't think he noticed it getting painful and the skin going red until and hour or so later. Had my share of electric shocks, but no RF burns yet... hmmm possibly I shouldn't temp fate.