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originally posted by: studio500
a reply to: intrptr
That's a battery charger for a power drill.
I did think if that would have any connection but it has never sat on the area of the bench where the high readings are plus when I scanned the charger the readings were low.
originally posted by: Justoneman
I suppose it is possible that the energy is channeled by the table and you are measuring the energy release point of the metal?
originally posted by: intrptr
originally posted by: studio500
a reply to: intrptr
That's a battery charger for a power drill.
I did think if that would have any connection but it has never sat on the area of the bench where the high readings are plus when I scanned the charger the readings were low.
Induction of EMF signals , concentrating and focusing in metal structures, depends on the metal structure, source of emf , etc.
You can try setting your meter on the the signal, then unplugging the charger , lifting the charger off the table, moving the table, all while watching the meter.
Grounding the table. I see the table legs insulated with plastic, sitting on a wooden floor?
No problem at all my friend
originally posted by: ManFromEurope
a reply to: Arbitrageur
I misunderstood Gauss vs. Tesla.
Sorry, OP, your Gaussmeter might check out ok.
originally posted by: Arbitrageur
a reply to: ManFromEurope
If you build a metal enclosure called a faraday cage, it will actually block radio signals from entering the enclosure.
originally posted by: FawnyKate
originally posted by: Arbitrageur
a reply to: ManFromEurope
If you build a metal enclosure called a faraday cage, it will actually block radio signals from entering the enclosure.
NO it will NOT
originally posted by: intrptr
a reply to: studio500
Inside a faraday cage signals are isolated from external radiation. Ground the table, remove all other influences, you can even use anti static mats with a ground strap like they do in Electronic Manuf. assembly and test.
Oh, and use Kling-free sheets in your dryer.
anti stat
So, evidently, David Ellis conducted experiments with Konstantin Raudive, inside a Faraday Cage, which blanks-out the radio field around a recording apparatus.
A common misconception is that a Faraday cage provides full blockage or attenuation; this is not true. The reception or transmission of radio waves, a form of electromagnetic radiation, to or from an antenna within a Faraday cage is heavily attenuated or blocked by the cage, however, a Faraday cage has varied attenuation depending on wave form, frequency or distance from receiver/transmitter, and receiver/transmitter power. Near-field high-powered frequency transmissions like HF RFID are more likely to penetrate. Solid cages generally provide better attenuation than mesh cages.
Just because it doesn't go to zero doesn't mean it's not being blocked. If it's 99.9% blocked it's still being 99.9% blocked. But yes maybe some small percentage gets through like 0.1% or some other amount depending on the cage, frequency, etc.
originally posted by: FawnyKate
Source en.wikipedia.org...
A Faraday cage or Faraday shield is an enclosure used to block electromagnetic fields.
An area behind a large piece of metal is called a "dead zone." Those locations do not receive any signal, because they are in the shadow of a metal object.
So if you're adding reflections then as this explains it can add to distortion of the signal and presumably if doing radio experiments one might want to avoid distortion, unless one is specifically trying to measure certain types of distortion.
Radio wave reflection
When a radio wave or in fact any electromagnetic wave encounters a change in medium, some or all of it may propagate into the new medium and the remainder is reflected. The part that enters the new medium is called the transmitted wave and the other the reflected wave.
The rules that govern the reflection of radio waves are simple and are the same as those that govern light waves....
In real transmission paths, radio waves are often reflected by a variety of different surfaces. Although ionospheric reflections are actually caused by refraction, they can often be considered as reflections. Also for shorter range signals like mobile phone or other VHF / UHF communications the signals undergo many reflections.
These multiple reflections lead to the signal arriving at the receiver via several paths. Radio wave reflections normally give rise to multi-path effects.
The multiple reflections and multi-path effects give rise to distortion of the signal and fading.