From: Chuck Simmons
Organization: You jest.
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Subject: Re: Any ideas on measuring radiation in the home ?
Date: Fri, 27 Sep 2002 11:37:04 GMT
NNTP-Posting-Date: Fri, 27 Sep 2002 04:37:04 PDT
John Woodgate wrote:
> I read in sci.electronics.design that News2020 wrote
> (in ) about
> 'Any ideas on measuring radiation in the home ?', on Fri, 27 Sep 2002:
> >The responses so far :
> Yes, you are getting some wild responses. The situation is that your
> radiation detector picked up *something* when you unplugged the oven.
> Inside the oven is a filter that prevents electrical noise, at much
> lower frequencies than the microwaves. This filter is always connected
> to the mains supply, even when the oven is switched off, and it draws a
> very small current from the supply. When you interrupt this current,
> there is a tiny burst of radio-frequency energy from the spark, and that
> is what your detector is responding to.
> The detector is misleading, because it is too sensitive; it is
> responding to radiation at a very low level indeed, a level far less
> than people have been exposed to over geological time from natural
There is a diagram here http://www.hills2.u-net.com/electron/uwave.htm
that shows a typical unit. It shows a line filter that you mention as
well as a transformwr to power the panel.
Noteworthy is the number of switches, relays and interlocks to keep the
magnetron from being powered unless conditions similar in rarity to
those at the parting of the Red Sea are met.
The line filter in combination with the current draw for the panel
controls make a spark likely on unplugging. The consensus is that such a
spark produces a completely harmless level of radiation of any sort. As
John has stated, considerably higher levels of radiation occur
I should point out that most of the first 10 years of my working career
was spent around high power radio transmitters and, for about a year,
around souces of atomic radiation. In those early years, I got many
times the exposure to radiation than an ordinary person gets in a
lifetime. There is no evidence that this was harmful to me.
... The times have been,
That, when the brains were out,
the man would die. ... Macbeth
Chuck Simmons firstname.lastname@example.org