In rec.radio.amateur.antenna art wrote:
On 5 Jul, 22:25, Jeff Liebermann wrote:
Radium hath wroth:
Radio waves are made up of electric and magnetic fields.
Yep.
Couldn't the Spin Exchange Relaxation Free Magnetometer receive the
magnetic portions of AM radio waves at the carrier frequencies I
described? If not, why?
Nope.
1. The range of the magnetic field is limited. For example, you're
not going to bounce (errr... refract) a magnetic fields off the
ionosphere.
2. Magentometers use very big coils. Very big coils have lots of
inductance. Resonant circuits with lots of inductance tend to
resonate at very low frequencies. Figure on maybe 30Hz being the
highest frequency detectable by a magnetometer. Most roll off even
earlier to avoid 60Hz power line pickup.
3. Magnetometers are expensive. You're proposing using one as a
replacement for a 5 cent silicon diode detector. If the technology
doesn't get to you, the accountants will.
Agreed, static magnetic fields tend to decay rapidly as you move away
from them. However, alternating magnetic fields continue to propogate
by generating alternating electric fields of the same frequency. These
alternating electric fields, in turn, generate alternating magnetic
fields. The cycle keeps repeating.
Rubbish.
--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
I believe that the standard example of radiation referred to above
is in error.
Belief doesn't make reality.
I do not believe that radiation consists of fields of any sort
but consists of ejected static particles in form of a swarm.
A hundred years or so of experments say that's utter, babbling,
nonsense.
I have asked the Eham forum to wade in on that one since it
appears they have more scientifically molecular inclined members.
Right.
The only cycle that repeates in radiation is the tank circuit of a
diagmagnetic material which is resonant i.e. equal capacitance and
inductance. Seems like the posts are relying on propagating fields
which to me is an error.
I'd suggest fluphenazine and haloperidol.
--
Jim Pennino
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