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Post Time: 18/05/2008 22:49:53 |
peter1000000
Total Forum Posts: 22 |
hi i have to sleep next door to someone with a digital phone and have tried to talk to him about the dangers but he says he has to have a cordless phone, if i get him an older cordless phone, one of the ones with pull up aerials on the base station and the phone will that give off radiation constantly or just when in use and how much, thank u, peter. |
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Post Time: 19/05/2008 09:38:17 |
Sarahp
Total Forum Posts: 48 |
The older analogue phone base units are unlikely to emit when not in use. However analogue cordless phones have also been associated with cataracts as well as some brain tumours (Hardell et al).
If your neighbour is used to a DECT phone then the reduced range that an analogue phone can deal with may be an issue, as well as the decreased security (it's easier to listen to someone's analogue coversation because of the way signals are transmitted).
Additionally, from a practical point of view, analogue cordless phones are pretty tricky to get hold of nowadays.
You may be better off looking at the Orchid Low Radiation cordless phone. Although it's a DECT phone, it stops radiating from the base station when the phone isn't being used, and operates at 75% less power when it *is* in use. |
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Post Time: 20/05/2008 23:03:25 |
peter1000000
Total Forum Posts: 22 |
thanks for the reply sarah, i already bought 4 analog phones off of e bay as they were only a few pounds each as i thought as they didnt give off a sound on my smog dectector that they were ok, is the an instument i can get that will dectect lower than 50mhz? i have an orchard phone for my family to use but as i have a young sister who is constantly on the phone am worried because it still makes a hell of a noise on my dectector, peter. |
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Post Time: 21/05/2008 10:12:22 |
alasdairP
Total Forum Posts: 173 |
If someone uses the phone a lot, then the only safe answer is to use a wired phone. As you can buy DIY extension cables and kits for ordinary phone lines, it isn't usually too difficult to have an extra telephone socket in another room (e.g. your sister's bedroom) and you can generally have at least 4 telephone units on one incoming phone line.
Most people don't seem to react to the older analogue cordless units, although they actually emit more RF energy than DECT phones - though it doesn't pulse, which is why we believe DECT cause far more well-being problems.
Old analogue cordless phones can be listened into with any cheap "scanner radio" (remember the Charles "sqidgy tapes"). Few people do actually do this, but it has to be borne in mind that they are not "secure".
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Post Time: 22/05/2008 23:14:44 |
peter1000000
Total Forum Posts: 22 |
thank you, do u know how much rf energy they do give out? also is there an instrument that measures below 50mhz that i wouldnt need to take out a mortgage to purchase? |
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Post Time: 23/05/2008 10:08:45 |
alasdairP
Total Forum Posts: 173 |
The main problem is calibration of the measurement antenna/aerial. I don't know of a cheap meter that is any good at 30-40 MHz. However, the max effective radiated power of such an analogue cordless phone and base unit (MPT1384) is 10 mW, which is something like 1 volt per metre at 50 cm from the antenna. Very close up (next to the user's head) is difficult to gauge as it is in the near-field and would vary from person to person as well as handset to handset. It doesn't pulse, so it is 10 mW all the time. Mobile phones are 125 or 250 mW max average power, 1000 or 2000 mW in the regular pulses.
DECT uses a FIXED power data pulses of 0.25W ALL OF THE TIME. It has a 1:24 duty-cycle and so the average power is only 10 mW - but the pulses are still 250mW for 417us every 10ms - and I believe that we are NOT talking about SAR (i.e. heating effects) but about signalling and informational effects - the regular tapping disrupts intercellular signalling processes.
So analogue cordless phones are the same average power as DECT, but not pulsing at 24 times higher. I hope this helps. |
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Post Time: 24/05/2008 22:17:01 |
peter1000000
Total Forum Posts: 22 |
it does 4 the amount i understand, i think im going to have to study microwaves and radiation to fully understand, but does a analogue phone emit all the time, even when not in use like a dect phone, also have u heard of the dirty electricity theroy and the stetzer things to get rid of it, or do u think that that is a minimal effect if any at all? thank u,
peter. |
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Post Time: 27/05/2008 10:20:22 |
alasdairP
Total Forum Posts: 173 |
The analogue cordless phones and their base units only emit when they are being used for phone calls.
The Stetzer "dirty electricity" issue is diffrent. The Stetzer meter only assesses transient noise between 2 kHz and 100 kHz which comes from computer and TV and video power supplies, motor switching, etc, and has nothing to do with microwave telecommunications technology (which runs at frequencies greater than 300 MHz - 3000 times higher in frequency).
Stetzer filters (capacitors) reduce this transient noise, and some positive effects have been found and reported in the scientific literature, mainly by Prof Magnda Havas. I would never use more than 3 or 4 Stetzer filters in a house and then, only with care and after the the magnetic field levels from the house wiring had been previously checked and found to be low. If you fit then in a house with faulty wiring, then the magnetic fields will rise. The UK supplier offers a money-back 30 day offer, so you could get 4 and try them and see if they help and return them if you don't find that they do.
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