"Measuring" emfs of electronics in stores

>I recently took my AM radio, and visited some stores to "test" some LCD TVs
>and computers (Apple computers specifically). The results were kind-of
>complex - for example, it seems that that measuring the same model LCD TV
>in a different store resulted in a different reading.
>
> This made me wonder about the different factors that may affect the RF
> readings of electronics inside of stores. For one thing, could the RF
> reading of a particular device be *stronger* inside of a store full of
> other electronics - because of the all of the "dirty electricity" from the
> different electronics infiltrating the store's wiring? Or are retailers
> savvy enough to filter the wiring (because a "purer" power source
> allegedly improves the look/performance of a device) - leading to *lower*
> readings than what you would get inside of your own house?
>
> I just want to have some idea if the reading I got from a device inside of
> a store full of electronics would be similar to the reading I would get in
> my home.
>
> Btw, based on my own tests - the Apple computers I tested (15" Macbook
> Pro, Mac Mini, iMac) "passed" with flying colors - I didn't get any sharp
> noises on my AM radio at any frequency. Even when I dimmed the monitor of
> the Macbook Pro, I got no RF reading (I get definite RF readings when I
> dim the monitor of my Dell laptop).
>
> However - the AM radio only "measures" frequencies in the 0.53 MHz to 1.7
> MHz range; there could have been emr frequencies radiating from the Apple
> computers that fell outside of this range. I definitely felt a certain
> "field" while standing in front of the Macbook Pros inside of the Apple
> Store (whether or not this field would be "tolerable" is up for debate).
> But I was in a store full of Macs using WiFi, so...
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>

>
>
> I recently took my AM radio, and visited some stores to "test" some LCD TVs
> and computers (Apple computers specifically). The results were kind-of
> complex - for example, it seems that that measuring the same model LCD TVin
> a different store resulted in a different reading.
>
> This made me wonder about the different factors that may affect the RF
> readings of electronics inside of stores. For one thing, could the RF
> reading of a particular device be *stronger* inside of a store full of other
> electronics - because of the all of the "dirty electricity" from the
> different electronics infiltrating the store's wiring? Or are retailers
> savvy enough to filter the wiring (because a "purer" power source allegedly
> improves the look/performance of a device) - leading to *lower* readings
> than what you would get inside of your own house?
>
> I just want to have some idea if the reading I got from a device inside of
> a store full of electronics would be similar to the reading I would get in
> my home.
>
> Btw, based on my own tests - the Apple computers I tested (15" Macbook Pro,
> Mac Mini, iMac) "passed" with flying colors - I didn't get any sharp noises
> on my AM radio at any frequency. Even when I dimmed the monitor of the
> Macbook Pro, I got no RF reading (I get definite RF readings when I dim the
> monitor of my Dell laptop).
>
> However - the AM radio only "measures" frequencies in the 0.53 MHz to 1.7
> MHz range; there could have been emr frequencies radiating from the Apple
> computers that fell outside of this range. I definitely felt a certain
> "field" while standing in front of the Macbook Pros inside of the Apple
> Store (whether or not this field would be "tolerable" is up for debate). But
> I was in a store full of Macs using WiFi, so...
>
>  
>

> On Wed, May 5, 2010 at 5:51 AM, svetaswan <svetaswan@...> wrote:
>
> >
> >
> > I recently took my AM radio, and visited some stores to "test" some LCDTVs
> > and computers (Apple computers specifically). The results were kind-of
> > complex - for example, it seems that that measuring the same model LCD TV in
> > a different store resulted in a different reading.
> >
> > This made me wonder about the different factors that may affect the RF
> > readings of electronics inside of stores. For one thing, could the RF
> > reading of a particular device be *stronger* inside of a store full of other
> > electronics - because of the all of the "dirty electricity" from the
> > different electronics infiltrating the store's wiring? Or are retailers
> > savvy enough to filter the wiring (because a "purer" power source allegedly
> > improves the look/performance of a device) - leading to *lower* readings
> > than what you would get inside of your own house?
> >
> > I just want to have some idea if the reading I got from a device insideof
> > a store full of electronics would be similar to the reading I would getin
> > my home.
> >
> > Btw, based on my own tests - the Apple computers I tested (15" Macbook Pro,
> > Mac Mini, iMac) "passed" with flying colors - I didn't get any sharp noises
> > on my AM radio at any frequency. Even when I dimmed the monitor of the
> > Macbook Pro, I got no RF reading (I get definite RF readings when I dimthe
> > monitor of my Dell laptop).
> >
> > However - the AM radio only "measures" frequencies in the 0.53 MHz to 1.7
> > MHz range; there could have been emr frequencies radiating from the Apple
> > computers that fell outside of this range. I definitely felt a certain
> > "field" while standing in front of the Macbook Pros inside of the Apple
> > Store (whether or not this field would be "tolerable" is up for debate). But
> > I was in a store full of Macs using WiFi, so...
> >
> >  
> >
>
>
> [Non-text portions of this message have been removed]
>

>
>
>
>
> --- In [hidden email] <eSens%40yahoogroups.com>, Bill Bruno
> <wbruno@...> wrote:
> >
> > I was in a mac store about 6 months ago. I mostly
> > noticed the monitors were terrible in terms of the AM
> > radio, even from 6 feet away. Did you check those?
> > At what distance are you checking the macbooks?
> >
> > Bill
>
> ----->I believe I stood pretty close to the table on which the Macbooks
> were placed - if not right up against it. But I extended my arm and moved
> the radio as much as a foot away (if not more) from the computer and screen,
> and I hardly got any "noise" at all, at any frequency.
>
> Of course I realize that the AM radio test doesn't tell the whole story on
> these computers - as I mentioned, I subjectively felt a certain "field"
> while in front of many of the Macbooks. (I also felt "vague" chest pains,as
> I sometimes/often do when I'm on this Dell laptop.) When I stepped back from
> the laptop, the feeling diminished - but I'm not sure if this means that I
> could buy a Macbook Pro, use it at a distance, and be fine.
>
> It's worth noting that all of the Macbooks were using WiFi.
>
> I did test the Apple Cinema display - my rough notes on the display say,
> "not getting much of a reading...". I just didn't pick up much of any
> "noise" from the display. Perhaps more significantly, I stood close to that
> 24" display and hardly felt any "stress" at all - to me, the screen felt
> remarkably good for a large, high-resolution display at close range.
>
> I still wouldn't want to sit/stand that close to a 24" screen, and the
> resolution was probably way too "tight" for long-term viewing. Trying to
> change to a lower resolution resulted in awful-looking, fuzzy font.
>
> The cinema display was hooked up to a Mac Mini. I hardly got any AM radio
> response at close ranges, but when I moved the radio away (like a foot or
> more away), I picked up some noise. But it's hard to say if the Mini was the
> source of that noise, or something else in the vicinity. And it seems that I
> didn't feel any "field" from the Mini - unlike the Macbooks, the Mini was
> using an ethernet connection, and this particular model didn't have an
> optical drive.
>
> As far as the iMac, it seems that (as with all the Apple products), I
> didn't pick up anywhere near the AM "noises" that I was expecting. I might
> have picked up a little RF noise at close range at certain locations around
> the sides/back of the computer - but nothing major (I tested the iMac on a
> separate visit - and I was more self-conscious while testing these computers
> because it seems that people were watching me more. By this point, I sensed
> "subtle" vibes that I was being regarded as a prime suspect to "lift" oneof
> the computers - which is ridiculous - but that's another story.).
> Subjectively, I may have felt a little of a "field" when I first started
> "testing" the computer - but the feeling mysteriously diminished - at least
> some. The iMacs were quite warm to the touch - even the screen was very
> warm.
>
> Actually, based on my limited exposure - the iMacs may actually be more
> "tolerable" than the Macbooks - or at the very least, no worse. Seems hard
> to believe...but these were my subjective impressions. I feel like I needto
> verify this at least one more time. (Not that I'm seriously considering an
> iMac at this point.)
>
> So these were my experiences inside of the Apple Store. I can't explain why
> you picked up so much RF noise from the Mac products, and I didn't.
>
> ~Svetaswan
>
>
> > On Wed, May 5, 2010 at 5:51 AM, svetaswan <svetaswan@...> wrote:
> >
> > >
> > >
> > > I recently took my AM radio, and visited some stores to "test" some LCD
> TVs
> > > and computers (Apple computers specifically). The results were kind-of
> > > complex - for example, it seems that that measuring the same model LCD
> TV in
> > > a different store resulted in a different reading.
> > >
> > > This made me wonder about the different factors that may affect the RF
> > > readings of electronics inside of stores. For one thing, could the RF
> > > reading of a particular device be *stronger* inside of a store full of
> other
> > > electronics - because of the all of the "dirty electricity" from the
> > > different electronics infiltrating the store's wiring? Or are retailers
> > > savvy enough to filter the wiring (because a "purer" power source
> allegedly
> > > improves the look/performance of a device) - leading to *lower*
> readings
> > > than what you would get inside of your own house?
> > >
> > > I just want to have some idea if the reading I got from a device inside
> of
> > > a store full of electronics would be similar to the reading I would get
> in
> > > my home.
> > >
> > > Btw, based on my own tests - the Apple computers I tested (15" Macbook
> Pro,
> > > Mac Mini, iMac) "passed" with flying colors - I didn't get any sharp
> noises
> > > on my AM radio at any frequency. Even when I dimmed the monitor of the
> > > Macbook Pro, I got no RF reading (I get definite RF readings when I dim
> the
> > > monitor of my Dell laptop).
> > >
> > > However - the AM radio only "measures" frequencies in the 0.53 MHz to
> 1.7
> > > MHz range; there could have been emr frequencies radiating from the
> Apple
> > > computers that fell outside of this range. I definitely felt a certain
> > > "field" while standing in front of the Macbook Pros inside of the Apple
> > > Store (whether or not this field would be "tolerable" is up for
> debate). But
> > > I was in a store full of Macs using WiFi, so...
> > >
> > >
> > >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>  
>

>
> I mainly noticed that the monitors were bad on my AM radio.
> It's quite possible the models have changed since my visit,
> but I think they were LED lit then.
>
> I'd like to know if you noticed anything better or worse regarding
> the macbook air?
>
>
>
> On Sat, May 8, 2010 at 5:12 PM, svetaswan <svetaswan@...> wrote:
>
> >
> >
> >
> >
> > --- In [hidden email] <eSens%40yahoogroups.com>, Bill Bruno
> > <wbruno@> wrote:
> > >
> > > I was in a mac store about 6 months ago. I mostly
> > > noticed the monitors were terrible in terms of the AM
> > > radio, even from 6 feet away. Did you check those?
> > > At what distance are you checking the macbooks?
> > >
> > > Bill
> >
> > ----->I believe I stood pretty close to the table on which the Macbooks
> > were placed - if not right up against it. But I extended my arm and moved
> > the radio as much as a foot away (if not more) from the computer and screen,
> > and I hardly got any "noise" at all, at any frequency.
> >
> > Of course I realize that the AM radio test doesn't tell the whole storyon
> > these computers - as I mentioned, I subjectively felt a certain "field"
> > while in front of many of the Macbooks. (I also felt "vague" chest pains, as
> > I sometimes/often do when I'm on this Dell laptop.) When I stepped backfrom
> > the laptop, the feeling diminished - but I'm not sure if this means that I
> > could buy a Macbook Pro, use it at a distance, and be fine.
> >
> > It's worth noting that all of the Macbooks were using WiFi.
> >
> > I did test the Apple Cinema display - my rough notes on the display say,
> > "not getting much of a reading...". I just didn't pick up much of any
> > "noise" from the display. Perhaps more significantly, I stood close to that
> > 24" display and hardly felt any "stress" at all - to me, the screen felt
> > remarkably good for a large, high-resolution display at close range.
> >
> > I still wouldn't want to sit/stand that close to a 24" screen, and the
> > resolution was probably way too "tight" for long-term viewing. Trying to
> > change to a lower resolution resulted in awful-looking, fuzzy font.
> >
> > The cinema display was hooked up to a Mac Mini. I hardly got any AM radio
> > response at close ranges, but when I moved the radio away (like a foot or
> > more away), I picked up some noise. But it's hard to say if the Mini was the
> > source of that noise, or something else in the vicinity. And it seems that I
> > didn't feel any "field" from the Mini - unlike the Macbooks, the Mini was
> > using an ethernet connection, and this particular model didn't have an
> > optical drive.
> >
> > As far as the iMac, it seems that (as with all the Apple products), I
> > didn't pick up anywhere near the AM "noises" that I was expecting. I might
> > have picked up a little RF noise at close range at certain locations around
> > the sides/back of the computer - but nothing major (I tested the iMac on a
> > separate visit - and I was more self-conscious while testing these computers
> > because it seems that people were watching me more. By this point, I sensed
> > "subtle" vibes that I was being regarded as a prime suspect to "lift" one of
> > the computers - which is ridiculous - but that's another story.).
> > Subjectively, I may have felt a little of a "field" when I first started
> > "testing" the computer - but the feeling mysteriously diminished - at least
> > some. The iMacs were quite warm to the touch - even the screen was very
> > warm.
> >
> > Actually, based on my limited exposure - the iMacs may actually be more
> > "tolerable" than the Macbooks - or at the very least, no worse. Seems hard
> > to believe...but these were my subjective impressions. I feel like I need to
> > verify this at least one more time. (Not that I'm seriously consideringan
> > iMac at this point.)
> >
> > So these were my experiences inside of the Apple Store. I can't explainwhy
> > you picked up so much RF noise from the Mac products, and I didn't.
> >
> > ~Svetaswan
> >
> >
> > > On Wed, May 5, 2010 at 5:51 AM, svetaswan <svetaswan@> wrote:
> > >
> > > >
> > > >
> > > > I recently took my AM radio, and visited some stores to "test" someLCD
> > TVs
> > > > and computers (Apple computers specifically). The results were kind-of
> > > > complex - for example, it seems that that measuring the same model LCD
> > TV in
> > > > a different store resulted in a different reading.
> > > >
> > > > This made me wonder about the different factors that may affect theRF
> > > > readings of electronics inside of stores. For one thing, could the RF
> > > > reading of a particular device be *stronger* inside of a store fullof
> > other
> > > > electronics - because of the all of the "dirty electricity" from the
> > > > different electronics infiltrating the store's wiring? Or are retailers
> > > > savvy enough to filter the wiring (because a "purer" power source
> > allegedly
> > > > improves the look/performance of a device) - leading to *lower*
> > readings
> > > > than what you would get inside of your own house?
> > > >
> > > > I just want to have some idea if the reading I got from a device inside
> > of
> > > > a store full of electronics would be similar to the reading I wouldget
> > in
> > > > my home.
> > > >
> > > > Btw, based on my own tests - the Apple computers I tested (15" Macbook
> > Pro,
> > > > Mac Mini, iMac) "passed" with flying colors - I didn't get any sharp
> > noises
> > > > on my AM radio at any frequency. Even when I dimmed the monitor of the
> > > > Macbook Pro, I got no RF reading (I get definite RF readings when Idim
> > the
> > > > monitor of my Dell laptop).
> > > >
> > > > However - the AM radio only "measures" frequencies in the 0.53 MHz to
> > 1.7
> > > > MHz range; there could have been emr frequencies radiating from the
> > Apple
> > > > computers that fell outside of this range. I definitely felt a certain
> > > > "field" while standing in front of the Macbook Pros inside of the Apple
> > > > Store (whether or not this field would be "tolerable" is up for
> > debate). But
> > > > I was in a store full of Macs using WiFi, so...
> > > >
> > > >
> > > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
> >  
> >
>
>
> [Non-text portions of this message have been removed]
>

>
> Possibly something to keep in mind... unless the store is really empty of
> customers, at any given moment and location in an Apple store, in addition
> to the demonstration computers¹ wireless internet signals there are probably
> tons of RF signals flying around from customers who are wandering around
> with their cell phones on.
>
>
> [Non-text portions of this message have been removed]
>