Minutus

Thanks Agi, good ideas.

And -- I think that being in the mountains of Vermont has many, many advantages! )
I am envious of that!

Shannon

Yes, that is in essence correct. It is the RF radio waves that have the high excitation vibratory energy. The electromagnetic field around the wires also has similar energies but at a small fraction in relation to the RF energy emitted.

The radio waves will not travel up the wire to any great degree unless the length of the wire is cut to a multiple of the initial wave called the "fundamental wave." Radio antennas are tuned to resonate based upon the frequencies that are transmitted through them. Devices known as "antenna tuners" adjust the length of an antenna electrically as it is difficult to physically adjust the actual length of the antenna wire for each change in frequency. All Ham radio operators must understand these principals before they can be issued operator licenses so this is common knowledge amongst most people familiar with electronics and the broadcasting industries.

Lets take the tuning fork & piano string scenario for instance. Most people know that a piano has octaves. We have all heard of "middle C" but there are also "C" notes above and below "middle C" and these are odd or even order harmonics of the wavelength of "middle C." They are slightly excited when the "middle C" note is plucked. These are the harmonics. An antenna may resonate at say 3 million cycles per second and a resonant radiator aka antenna that would vibrate like the tuning fork would lets say be 10.000 feet in length. When the transmitted energy at this specific frequency is applied to the wire, it goes into sympathetic vibration. If we cut back the length of the wire by a foot or so, the wire would not be in tune and most of the energy would be reflected back to the source which would overload it and damage it. Very little energy would come out of the antenna wire.

As long as the wire from the phone to the earpiece isn't tuned like an antenna, very little of the RF energy will pass into and thus out of the wire because it is acting like an untuned antenna or an out-of-tune "middle C" on the piano. The strings simply don't go into sympathetic vibration. Yes, some RF comes out but it is at very low levels and below what could be considered dangerous. lulu.com/comdyne Caveat Emptor! Carmi Hazen
----------------------------------------------------------------------
So you are saying that the radio waves carry the risk, not the magnetic field from the electric current, and radio waves are not transmitted up the headphone wires, am I following that? Thanks, that sounds reasonable. Just to help me read and reference more, do you recall where you read that? Maybe it's obvious if one understands the difference between radio wave generation of the phone, and electric current carried by the headphones… But I am not so literate as to just how these things work, so all information (and citations) appreciated!

You can get this or similar at 7-11 and Target stores, or mail order. Only way you get NO radiation.
http://www.gizmodiva.com/mobile_phones/ ... onal_h.php
Bluetooth is also dangerous.
http://www.radiationtalk.com/info/bluet ... ection.php
Susan

I agree that Bluetooth may constitute some risk, however, the amount of radiation is minuscule in comparison to the output of the cell phone itself which increases in its intensity the farther you are away from the serving cell tower. The cell phone can put out up to 3 watts. Bluetooth is in the very low milliwatt range. They do operate in the dangerous RF range that heats water molecules so I don't disagree. I just don't think that Bluetooth constitutes much risk. The wired handset is a better choice and I use a version of that myself. I translate the cell phone connection via Bluetooth to a converter that outputs standard telephone line and ringing voltages. This device allows me to use a conventional telephone in my car. I use the old standard '2500' type Bell System telephone which I love because I can hear on it which I find hard to do with the various cell phones I have owned over the years. I also use this converter at home which allows me to connect a multi-handset cordless phone to my cell phone.

I did retire that method and went over the Magic Jack. I love it! It works great! My only complaint is that I can't turn off the call waiting signal. I HATE call waiting! Caveat Emptor! Carmi Hazen
--------------------------------------------------------------------
Bluetooth is also dangerous

I LOVE MagicJack. Have an original MJ for a few years now added a MJ Plus. Much better voice quality day and night than years ago when daytime didn't perform well during high internet traffic.
I just received 2 more MJ+ on half price special for existing customers. The money saved is huge on calls. Not sure about the call waiting as rarely I get another call while on the phone but when I do, I usually click ignore on the s/w panel. One thing I don't like is MJ will disconnect you after 1.5 hours talking and you have to wait 5 or more minutes before redialing number. The other person can call you back and you can take the call from that number just can't redial. Also, the new MJ Plus lets you port an existing number, I have a 40 year old number that I ported to a cell phone from my old central office, but in NYC, that number can only go back to a landline in that old CO so I keep it alive on an old Virgin Mobile plan for $80 a year. Now, I want to port it to a MJ but they charge YEARLY for that, not just one time charge to port. That is a gotcha.
Also, the MJ becomes loose in the USB port, can disconnect when touched and I've broken the USB connector twice when on a laptop. The enclosed USB extension line doesn't help either. They charge $20 to replace a broken original MJ but not sure about an MJ Plus.
I'm currently following their stock CALL as it currently is being shorted, at a currentl low, a stock market technique to drive the price down so institutions and hedge funds can buy cheaper, and should be a money maker again soon. The Israeli founder is working on a WiFi version and new devices possible TV/Internet/Phone deal, etc.
Susan

I have 2 mj and gave one each to all my family members. I just got an app for phone and now my cell phone can port unto my MJ number and make cell phone calls from any wifi location and not use up cell minutes. So far it works great.
Saving money all around...but you do need the internet for everything.
Domenic

________________________________