About 25 years ago I had a 2 meter beam set up on a bay window next to the
shack. The antenna was actually about 10 feet above my head in the 2d story
room, but far enough from the attic roof to turn freely. Running about 200
watts, I discovered that pointing the beam North -and only North -- I got
terrible headaches when operating SSB.
Not on CW.
Some calculations showed exposure in that configuration was close to or a bit
over the then-current limit, or five times the Massachusetts draft statute. .
I doubt, however, that this was a thermal effect.
Some people who've met me (see you in August) may be thinking "THAT explains
it!"
Phooey on them.
Cortland
KA5S
----- Original Message -----
From: Tang, George <mailto:[email protected]>
To: [email protected]
Cc: John Woodgate <mailto:[email protected]> ; [email protected]
Sent: 7/29/2008 8:38:17 PM
Subject: RE: Another Cancer Scare?
Fred,
First of all, I am not the one who is making un-supported and unproven
claims
about cell phone usage and cancer; that honor belongs to Dr. Ronald B.
Herberman, director of the University of Pittsburgh Cancer Institute.
Secondly, I have been saying all along that the determining factor for safety
is power level and not a general claim against cell phone use. Third, I
asserted my claim that high frequency radiation (in GHz) has less effects on
controlling human body hormone production as compared to the power line
frequency effects in controlling human hormones, and cancer cell growth seems
to be related to the body hormone production (ornithine decarboxylase and
Melatonin). Further, I suggested that power line generates MUCH stronger
fields than the fields from cell phones – imagine holding a hair drier
(1500W, 13A heater coil) directly to your head for 10 or 15 minutes compared
to the mW (and mA) from the cell phone. What we have here is the low
frequency (more effective control of hormone) high power comparing to the high
frequency (less effective hormone control) low power fields. The good Dr.
Herberman seems to be barking up the wrong tree. I am not at all saying that
power line fields in residential areas cause cancer, since there are people
who live under power line for the whole life time without having cancer. I am
merely suggesting that when you increase the field strength by 1000 times in a
bio-lab environment, cancer cells may grow at a higher rate. But we all
understand that we do not live inside transformers. Everything taken to the
ex ! treme will cause problems. The human body is composed of 70% wat er, but
if a person drinks a gallon of water per hour continuously, he or she will die
within a few hours. I am not trying to cause panic. On the contrary, I am
simply questioning the claims made by the good Dr. Herberman.
George
________________________________
From: Fred Townsend [mailto:[email protected]]
Sent: Tuesday, July 29, 2008 1:02 PM
To: Tang, George
Cc: John Woodgate; [email protected]
Subject: Re: Another Cancer Scare?
George, thank you for your citations. Someone once wrote, "If you want
to
understand what is going on, follow the money." When I Google your citations
the ads from lawyers to join class action lawsuits on cell phones pop up. So
far what I read doesn't pass the smell test.
I have personally researched harmonics on power systems. They are not
that
common. They typically occur with 3 phase systems where switching power
supplies are used which means computer centers and the like. Computer centers
are a controlled environment where they try to keep the people away so they
won't pollute the computers. Commercial power lines are almost always in
conduit which means they are shielded as well. After all computer rooms are
full of magnetic media. (You wouldn't want to damage the media would you?) You
really have to work at finding low frequency harmonics that impinge on peopl !
e.
By definition harmonics are smaller than the fundamental which means if
you
start with a small fundamental the harmonics are going to be even smaller. It
is common to increase the dosage to accelerate cancer testing so why not use
strong fields to accelerate the test. This is easy to do in the lab but
difficult to do if you are using observation data from real life. Of course if
you are using real life data, it is no longer a controlled environment.
There is good money to be made if you can claim to be an expert witness
that
has seen cancer cells caused by magnetic fields. It is not surprising then
that people will stand up in court and perjure themselves. In court, experts
can give opinion in place of facts which is something ordinary people can't
do. In the case of juries isn't it interesting that people that know nothing
about the subject at hand are given the final say.
Fred Townsend
DC to Light
Tang, George wrote:
John,
You have provided very good info. My comment is that the fields used
in the
experiments are relatively weak, in the range of a few microT to 1800 microT,
and the durations are relatively short (a few days). Researchers have found
that when they increase the field strength up to 100 milli-G for months up to
1 year, the results show an increase in cancer cells growth.
George
!
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of John
Woodgate
Sent: Friday, July 25, 2008 11:39 PM
To: [email protected]
Subject: Re: Another Cancer Scare?
In message <[email protected]>
<mailto:[email protected]> ,
dated Fri, 25 Jul 2008, "Tang, George" <[email protected]>
<mailto:[email protected]> writes:
There has been some research published in the last few years
about
power line harmonics inducing cancer in the human body. These
are
fields in the kHz to hundreds of kHz and currents in the range
of tens
of amps to hundreds of amps.
&nbs
!
p;
There has also been a very great deal more research published that finds
no such effects. See, for example:
http://www.faqs.org/faqs/medicine/powerlines-cancer-faq/
If there were hundreds of amps at hundreds of kHz circulating in any
power distribution syste
!
m, it would collapse due to system capacitor<
/PRE>
heating and vast over-voltages on system inductors.
--
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
Either we are causing global warming, in which case we may be able to
stop it,
or natural variation is causing it, and we probably can't stop it. You
choose!
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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