RADIOWAVES FROM LCD SCREEN
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Paul Uk wonders ?
Who wants to have a stab at this one - I n my search for a LCD screen that I can tolerate I have borrowed yet another. Checking with Trifeild meter reveled fairly low emf, but a high pulsating electrical feild at the on/off switch button, ignoring that in close proximity to the switch I detected a radio wave with the Trifeild at around 0.15mw/cm2 ? Why ? Does this not say it all that most LCDs laptops etc are giving this off in shed loads, mostly at levels far less than the Trifeild can detect, however I repeat on this ocassion it picked up 0.15mw/cm2 ! p [Non-text portions of this message have been removed] |
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Hello Paul,
a Trifield meter is nice, but not good enough. I have measured some Plasma and LCD TV's. With special meters. Horrible. Philips with backlight, Samsung, Panasonice. Mostly there are 30-60 kHz signals, where electrosensibles may strongly react to. Greetings, Charles Claessens member Verband Baubiologie www.milieuziektes.nl www.milieuziektes.be www.hetbitje.nl checked by Bitdefender ----- Original Message ----- From: <[hidden email]> To: <[hidden email]> Sent: Monday, October 01, 2007 16:41 Subject: [eSens] RADIOWAVES FROM LCD SCREEN > Paul Uk wonders ? > Who wants to have a stab at this one - I n my search for a LCD screen that > I > can tolerate I have borrowed yet another. Checking with Trifeild meter > reveled fairly low emf, but a high pulsating electrical feild at the > on/off switch > button, ignoring that in close proximity to the switch I detected a radio > wave with the Trifeild at around 0.15mw/cm2 ? Why ? Does this not say it > all > that most LCDs laptops etc are giving this off in shed loads, mostly at > levels > far less than the Trifeild can detect, however I repeat on this ocassion > it > picked up 0.15mw/cm2 ! > > p > > > > > > > [Non-text portions of this message have been removed] > > > > > Yahoo! Groups Links > > > > |
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In reply to this post by PUK
In a message dated 10/1/2007 5:57:19 PM GMT Daylight Time, [hidden email] writes: Hello Paul, a Trifield meter is nice, but not good enough. I have measured some Plasma and LCD TV's. With special meters. Horrible. Philips with backlight, Samsung, Panasonice. Mostly there are 30-60 kHz Hi Charles do you not think it unusual to get the radio wave measurement with the trifeild, I have never experienced this before with any other equipment, as you say the trifeild is not best placed to detect rf from such equipment ? p [Non-text portions of this message have been removed] |
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Hello Paul,
the Trifield is not suited for measuring radio waves properly. Greetings, Charles Claessens member Verband Baubiologie www.milieuziektes.nl www.milieuziektes.be www.hetbitje.nl checked by Bitdefender ----- Original Message ----- From: <[hidden email]> To: <[hidden email]> Sent: Monday, October 01, 2007 20:36 Subject: Re: [eSens] RADIOWAVES FROM LCD SCREEN > > In a message dated 10/1/2007 5:57:19 PM GMT Daylight Time, > [hidden email] writes: > > Hello Paul, > > a Trifield meter is nice, but not good enough. > > I have measured some Plasma and LCD TV's. > With special meters. > Horrible. > Philips with backlight, Samsung, Panasonice. > > Mostly there are 30-60 kHz > > > Hi Charles do you not think it unusual to get the radio wave measurement > with the trifeild, I have never experienced this before with any other > equipment, as you say the trifeild is not best placed to detect rf from > such equipment > ? > > p > > > > > > > [Non-text portions of this message have been removed] > > > > > Yahoo! Groups Links > > > > |
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I've only ever seen the trifield RF mode respond to microwave ovens.
Was there a Wi-Fi signal on perhaps? Or, do you have the "broadband trifield"? I was just reading about it and I think if one is going to get a trifield the broadband option is probably worth it (still not very sensitive, but at least covers freqs from 60 Hz-2.5 GHz. Bill On 10/1/07, charles <[hidden email]> wrote: > > Hello Paul, > > the Trifield is not suited for measuring radio waves properly. > > Greetings, > Charles Claessens > member Verband Baubiologie > www.milieuziektes.nl > www.milieuziektes.be > www.hetbitje.nl > checked by Bitdefender > > ----- Original Message ----- > From: <[hidden email] <paulpjc%40aol.com>> > To: <[hidden email] <eSens%40yahoogroups.com>> > Sent: Monday, October 01, 2007 20:36 > Subject: Re: [eSens] RADIOWAVES FROM LCD SCREEN > > > > > In a message dated 10/1/2007 5:57:19 PM GMT Daylight Time, > > [hidden email] <charles%40milieuziektes.be> writes: > > > > Hello Paul, > > > > a Trifield meter is nice, but not good enough. > > > > I have measured some Plasma and LCD TV's. > > With special meters. > > Horrible. > > Philips with backlight, Samsung, Panasonice. > > > > Mostly there are 30-60 kHz > > > > > > Hi Charles do you not think it unusual to get the radio wave measurement > > with the trifeild, I have never experienced this before with any other > > equipment, as you say the trifeild is not best placed to detect rf from > > such equipment > > ? > > > > p > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > [Non-text portions of this message have been removed] |
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What is it with you all?
Are you married to Trifield? If you want to measure radio waves, there are better meters on the market. There does not exist a meter that can measure from 60 Hz to 2,5 GHz. Greetings, Charles Claessens member Verband Baubiologie www.milieuziektes.nl www.milieuziektes.be www.hetbitje.nl checked by Bitdefender ----- Original Message ----- From: "Bill Bruno" <[hidden email]> To: <[hidden email]> Sent: Tuesday, October 02, 2007 13:05 Subject: Re: [eSens] RADIOWAVES FROM LCD SCREEN > I've only ever seen the trifield RF mode respond to microwave ovens. > Was there a Wi-Fi signal on perhaps? Or, do you have the "broadband > trifield"? > I was just reading about it and I think if one is going to get a trifield > the > broadband option is probably worth it (still not very sensitive, but at > least covers > freqs from 60 Hz-2.5 GHz. > > Bill > > On 10/1/07, charles <[hidden email]> wrote: >> >> Hello Paul, >> >> the Trifield is not suited for measuring radio waves properly. >> >> Greetings, >> Charles Claessens >> member Verband Baubiologie >> www.milieuziektes.nl >> www.milieuziektes.be >> www.hetbitje.nl >> checked by Bitdefender >> >> ----- Original Message ----- >> From: <[hidden email] <paulpjc%40aol.com>> >> To: <[hidden email] <eSens%40yahoogroups.com>> >> Sent: Monday, October 01, 2007 20:36 >> Subject: Re: [eSens] RADIOWAVES FROM LCD SCREEN >> >> > >> > In a message dated 10/1/2007 5:57:19 PM GMT Daylight Time, >> > [hidden email] <charles%40milieuziektes.be> writes: >> > >> > Hello Paul, >> > >> > a Trifield meter is nice, but not good enough. >> > >> > I have measured some Plasma and LCD TV's. >> > With special meters. >> > Horrible. >> > Philips with backlight, Samsung, Panasonice. >> > >> > Mostly there are 30-60 kHz >> > >> > >> > Hi Charles do you not think it unusual to get the radio wave >> > measurement >> > with the trifeild, I have never experienced this before with any other >> > equipment, as you say the trifeild is not best placed to detect rf from >> > such equipment >> > ? >> > >> > p >> > >> > >> > >> > >> > >> > >> > [Non-text portions of this message have been removed] >> > >> > >> > >> > >> > Yahoo! Groups Links >> > >> > >> > >> > >> >> >> > > > [Non-text portions of this message have been removed] > > > > > Yahoo! Groups Links > > > > |
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I don't think I'd be using a TriField if I lived in Europe. But it does
have some things going for it: * Analog display with the right amount of damping. This is very nice for sweeping an area and understanding what's going on. * Not expensive--especially compared to other analog meters. * Uni-axial mode available, but omni-directional by default. * Good build quality. * Good battery life (but no auto-off function--remember to turn it off!). * Good customer service, at least in the US. It has faults too: - 20% accuracy at best - not very sensitive (although they sell a 100x probe for magnetic fields- but I think the magnetic field sensitivity is just about good enough without it). - a little too bulky to fit in most pockets. - no auto-off Note that LessEMF also bills it as one of their favorites, and Ed Leeper in Silencing the Fields confirms most of the above points (although perhaps emphasizes more the poor accuracy). But let us know if there is something better for under $150! Bill On 10/2/07, charles <[hidden email]> wrote: > > What is it with you all? > Are you married to Trifield? > > If you want to measure radio waves, there are better meters on the market. > > There does not exist a meter that can measure from 60 Hz to 2,5 GHz. > > Greetings, > Charles Claessens > member Verband Baubiologie > www.milieuziektes.nl > www.milieuziektes.be > www.hetbitje.nl > checked by Bitdefender > > ----- Original Message ----- > From: "Bill Bruno" <[hidden email] <wbruno%40gmail.com>> > To: <[hidden email] <eSens%40yahoogroups.com>> > Sent: Tuesday, October 02, 2007 13:05 > Subject: Re: [eSens] RADIOWAVES FROM LCD SCREEN > > > I've only ever seen the trifield RF mode respond to microwave ovens. > > Was there a Wi-Fi signal on perhaps? Or, do you have the "broadband > > trifield"? > > I was just reading about it and I think if one is going to get a > trifield > > the > > broadband option is probably worth it (still not very sensitive, but at > > least covers > > freqs from 60 Hz-2.5 GHz. > > > > Bill > > > > On 10/1/07, charles <[hidden email]<charles%40milieuziektes.be>> > wrote: > >> > >> Hello Paul, > >> > >> the Trifield is not suited for measuring radio waves properly. > >> > >> Greetings, > >> Charles Claessens > >> member Verband Baubiologie > >> www.milieuziektes.nl > >> www.milieuziektes.be > >> www.hetbitje.nl > >> checked by Bitdefender > >> > >> ----- Original Message ----- > >> From: <[hidden email] <paulpjc%40aol.com> <paulpjc%40aol.com>> > >> To: <[hidden email] <eSens%40yahoogroups.com><eSens%40yahoogroup > s.com>> > >> Sent: Monday, October 01, 2007 20:36 > >> Subject: Re: [eSens] RADIOWAVES FROM LCD SCREEN > >> > >> > > >> > In a message dated 10/1/2007 5:57:19 PM GMT Daylight Time, > >> > [hidden email] <charles%40milieuziektes.be><charles%40milieuzi > ektes.be> writes: > >> > > >> > Hello Paul, > >> > > >> > a Trifield meter is nice, but not good enough. > >> > > >> > I have measured some Plasma and LCD TV's. > >> > With special meters. > >> > Horrible. > >> > Philips with backlight, Samsung, Panasonice. > >> > > >> > Mostly there are 30-60 kHz > >> > > >> > > >> > Hi Charles do you not think it unusual to get the radio wave > >> > measurement > >> > with the trifeild, I have never experienced this before with any > other > >> > equipment, as you say the trifeild is not best placed to detect rf > from > >> > such equipment > >> > ? > >> > > >> > p > >> > > >> > > >> > > >> > > >> > > >> > > >> > [Non-text portions of this message have been removed] > >> > > >> > > >> > > >> > > >> > Yahoo! Groups Links > >> > > >> > > >> > > >> > > >> > >> > >> > > > > > > [Non-text portions of this message have been removed] > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > [Non-text portions of this message have been removed] |
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In reply to this post by PUK
In a message dated 10/2/2007 12:05:42 PM GMT Daylight Time, [hidden email] writes: I've only ever seen the trifield RF mode respond to microwave ovens. Was there a Wi-Fi signal on perhaps? Or, do you have the "broadband trifield"? I was just reading about it and I think if one is going to get a trifield the broadband option is probably worth it (still not very sensitive, but at least covers freqs from 60 Hz-2.5 GHz. Bill The point is that it seemd unusual for the trifeild to register on the radiowave scale when used against and LCD screen !!?? [Non-text portions of this message have been removed] |
Re: RADIOWAVES FROM LCD SCREEN
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In reply to this post by PUK
0.15mw/cm2 seems to be on the high end for
an LCD screen, but not outrageous. The reading will be higher if your holding the meter in your hand. The monitor I'm working on emits just 0.003 uw/cm2 max. That's using a Trifield 'RF Field strength Meter' I like my Trifield 100XE. If you see the needle move a hairs width on the "radio/microwave" scale then you know to stay away. It'll pick up RF from cell towers as you drive by one. If you want more sensitivity/accuracy you'll have to pay up. The EMF emissions from three LCD monitors are compared here: http://www.ahappyhabitat.com/computer.html Eli |
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In reply to this post by PUK
In a message dated 10/3/2007 3:59:17 AM GMT Daylight Time, [hidden email] writes: I like my Trifield 100XE. If you see the needle move a hairs width on the "radio/microwave" scale then you know to stay away. It'll pick up RF from cell towers as you drive by one. If you want more sensitivity/as you d you'll have to pay up. The 100xe is what I have with an alarm. needless to say I have not continued to use the offending monitor as it muzzd me out big time. I went into a pub yesterday minding my own business for a drink with my father and brother, within 1minute of being in the pub I could feel high emf, I was looking round for clues but saw nothing obvious, said to my brother that I would only stay for a pint, he got anoyed when he learned of my reason, I got anoyed at his reaction and turning to leave I saw whar must have been a WIFI router on the ceiling just above my head. I left with a great fury in my belly, that is when my legs felt thier normal weight again ! The net is closing for the ES in this town anyway ! How many battles have started with the premise - "I will not be driven from my land !" P UK [Non-text portions of this message have been removed] |
Re: RADIOWAVES FROM LCD SCREEN
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I too was in at a pub yesterday with
two huge plasma TVs at the bar. My idiot self-centered brother says, "lets eat at the bar". Freedom is no more. |
Re: RADIOWAVES FROM LCD SCREEN
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Jaime, maybe YOU need to be a little more self centered and say that
you don't want to eat at the bar. Yolanda On Oct 3, 2007, at 8:39 AM, jaime_schunkewitz wrote: > I too was in at a pub yesterday with > two huge plasma TVs at the bar. My idiot > self-centered brother says, "lets eat at > the bar". Freedom is no more. > > > [Non-text portions of this message have been removed] |
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