In message , Sean Breheny writes >> Lastly, the transmitter in the phone is very, very, very weak - we're >> talking mW, not watts of transmitting power. > >Are you sure about this? Given how warm the phone gets during a call, >as well as the distance it must cover reliably, I'd guess that the >peak power is about 1 or 2W and the average at least a few 100 mW. Depends on the network, depends on the phone and your proximity to a cell base station, the power level is adaptive and should ramp up to the maximum as necessary. There are fairly strict limits on the power emitted from a cell phone (800mW seems to stick for some reason) but there are different classes of phone with different power levels. Line of sight you can get away with surprisingly low power levels over decent distances. > >I tried several wired headsets first and they had strange >quirks like my phone sometimes deciding to mute the microphone of the >headset for no apparent reason. I go through three or four wired headsets a year because of this, I prefer wired headsets over bluetooth. There is also some evidence that using some wired headsets actually worsens the RF exposure. >So, I now use a Bluetooth earpiece - >of course that itself is RF but much lower power. I'm not an RF or power line nut but it seems only sensible to minimise exposure to any form of RF that's not necessary. > >Sean > -- Clint Sharp -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist