When I was in the 9th grade I built a Tesla Coil using a pair of 811A
transmitting tubes (3B28 Xenon gas rectifier tube also) putting out about 600
Watts of power at ~300 kHz. Produced a nice corona. Looking back at the
effects that thing had, I estimate I was standing in a field of about 10,000
V/M at 300 kHz for hours at at time as I played with it heating up
screwdrivers from the magnetic field, lighting fluorescent lights from a
distance, and inducing sparks from a 6 inch wire laying on the same table as
the Tesla Coil to my finger of about 1/2 inch. I was over driving the tubes.
After a while the plates glowed cherry red and I had to let them cool down a
while. The grid leak resistor got so hot it melted the solder and was swing
free on its connections as well.
I played with the Tesla Coil for hours at a time to the dismay of our
neighbors as it killed TV pictures for quite a distance. I suspect it would
not pass FCC/CE/UL or any other standard these days.
Well, I survived it and my kids all had two arms, two legs, and one head,
although some of my friends say that the story explains some things about me
(they didn't elaborate).
Doug
Hopkins, Michael J. wrote:
Not to mention those still working at facilities such as the Sackville,
NB transmitter site or others like it --- VOA etc... In Sackville, I was
amazed that I could park right below one of the big wire arrays where
the control room is located. Multiple transmitters running most of the
time between about 6MHz and 17MHz or so....
NAA in Cutler Maine also comes to mind -- Megawatts of power at
something like 15 or 17kHz radiating from an array composed of 25
towers.... Pretty impressive stuff...
Mike Hopkins...
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of 'Rich
Nute'
Sent: Wednesday, August 06, 2008 1:20 PM
To: 'Chris Wells'; 'Oscar Overton'
Cc: [email protected]; [email protected]
Subject: RE: RF What-if (was: RE: Another Cancer Scare?)
Back in the old days -- say mid-50's
or earlier, broadcast transmitters were required to be monitored
full-time by a qualified engineer. High-power AM transmitters bombarded
these guys with all kinds of stuff.
Many of these old-timers reported
effects on the brain, but I can't
remember the details. But, they did
survive to tell the tales! (For 25
years or so, I worked side-by-side
with a former transmitter engineer.)
Different frequency, different power,
probably different effects on the
human body. We still have public
concerns that transmitter radiation
at the periphery of the site is too
much. Paul Brodeur's book, "Currents
of Death," (based on faulty research)
popularized the notion of cancer from
any transmitter as well as power
transmission lines and video display
terminals.
Rich
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
Chris
Wells
Sent: Wednesday, July 30, 2008 6:26 PM
To: Oscar Overton
Cc: [email protected]; [email protected]
Subject: Re: RF What-if (was: RE: Another Cancer Scare?)
Oscar - I spend a lot of time debugging systems and separating
coincidence from cause so I appreciate your skeptic stance.
I would agree that it was not a controlled experiment but it
was my
experience that I wanted to share.
My exposure was over a good part of a month and my flu like
symptoms
happened at the exposure time and stopped ~ 4hrs+ later after
leaving
the area.
I would estimate ~ 15 exposures events over that month and then
many
months before and after without any problems.
As a result of my experience I am being cautious, limiting
unnecessary exposure and since I work with power being
observant of
other situations.
Chris Wells
From: "Oscar Overton" <[email protected]>
<mailto:[email protected]>
Chris,
Until you can do this repeatedly and the results are the same,
you
have only demonstrated a coincidence.
Oscar Overton
Product Safety
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