J
Jeff Liebermann
Guest
On Mon, 13 Oct 2014 17:35:14 -0700, Jeff Liebermann <jeffl@cruzio.com>
wrote:
Here's the UK numbers for incidence of brain cancer and tumors:
<http://www.cancerresearchuk.org/cancer-info/cancerstats/types/brain/incidence/uk-brain-and-central-nervous-system-cancer-incidence-statistics#Trends>
The various graphs show much the same lack of a radical increase in
brain cancers with the introduction of cell phones, and the radical
increase in incidence that accompanies aging. No sign in the graphs
of any 490% increase among teenagers using cell phones for 10 years.
I was somewhat off on the tx power of a cordless phone and cell phone.
<http://en.wikipedia.org/wiki/DBm>
DECT tx power: 10 mW (250 mW peak) in Europe
4 mW (100 mW peak) in the US
For cell phones: 100 mW avg (2 watt max) for 800/900 MHz band
100 mw avg (1 watt max) for 1900/1800 MHz band
UMTS/3G phones are a bit different:
1 watt - Power Class 1 mobile
500 mW - Power Class 2 mobile
250 mW - Power Class 3 mobile
Bluetooth: 100 mW - Class 1
2.5 mW - Class 2
1 mW - Class 3
The tx power of a cell phone is controlled by the cell site and is
usually set for the lowest tx power needed to maintain a minimum BER
(bit error rate). If you can get into the "Field Test Mode", you can
display that power output:
<http://www.wilsonelectronics.com/uploads/docs/FieldTestModes06142010%20wilson004.pdf>
My junk LG VX8300 started out showing about -9dBW (126 mW). After
about 30 seconds, the TX power settled down to about -15dBW (32 mW)
and stayed there (as long as I didn't move).
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
wrote:
Here's the UK numbers for incidence of brain cancer and tumors:
<http://www.cancerresearchuk.org/cancer-info/cancerstats/types/brain/incidence/uk-brain-and-central-nervous-system-cancer-incidence-statistics#Trends>
The various graphs show much the same lack of a radical increase in
brain cancers with the introduction of cell phones, and the radical
increase in incidence that accompanies aging. No sign in the graphs
of any 490% increase among teenagers using cell phones for 10 years.
I was somewhat off on the tx power of a cordless phone and cell phone.
<http://en.wikipedia.org/wiki/DBm>
DECT tx power: 10 mW (250 mW peak) in Europe
4 mW (100 mW peak) in the US
For cell phones: 100 mW avg (2 watt max) for 800/900 MHz band
100 mw avg (1 watt max) for 1900/1800 MHz band
UMTS/3G phones are a bit different:
1 watt - Power Class 1 mobile
500 mW - Power Class 2 mobile
250 mW - Power Class 3 mobile
Bluetooth: 100 mW - Class 1
2.5 mW - Class 2
1 mW - Class 3
The tx power of a cell phone is controlled by the cell site and is
usually set for the lowest tx power needed to maintain a minimum BER
(bit error rate). If you can get into the "Field Test Mode", you can
display that power output:
<http://www.wilsonelectronics.com/uploads/docs/FieldTestModes06142010%20wilson004.pdf>
My junk LG VX8300 started out showing about -9dBW (126 mW). After
about 30 seconds, the TX power settled down to about -15dBW (32 mW)
and stayed there (as long as I didn't move).
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558