60 Hz RF

[GoldIntermetallicEmbrittl]

On Wed, 04 May 2011 16:15:59 -0700, Bill K7NOM <billj@ieee.org> wrote:

On 5/4/2011 8:40 AM, George Herold wrote:
On May 3, 4:13 pm, Joe Snodgrass<joe.s...@yahoo.com> wrote:
On May 3, 9:41 am, George Herold<gher...@teachspin.com> wrote:

On May 3, 8:46 am, Joe Snodgrass<joe.s...@yahoo.com> wrote:

What do you suppose would be a good way for a person to generate high
intensity RF at 60 Hz? TIA

How about a big coil plugged into the wall socket?

Congratulations, you've just solved one of the most important problems
in the history of power electronics. What part of the world are you
in?

Excellent is there any prize money involved?

George H.

How about a BIG COIL plugged in to the transmission line from Hoover Dam

Bill K7NOM

Go look at the quarter shrinking site.

 

[Rich Grise]

Mark wrote:

On May 4, 5:02 am, Uwe Hercksen <herck...@mew.uni-erlangen.de> wrote:
John Larkin schrieb:

A coil doesn't have to be resonated to radiate EM waves. Resonating it
just reduces the load on the AC power supply.

a coil would radiate a (strong) magnetic field with 60 Hz, but a very
weak electric field. For an efective radiation of EM waves, you would
need the electric and magnetic fields together, with balanced strength.
Otherwise the EM waves could not work over larger distances.

thought experiment..

take a small coil with a large current that radiates as you say a
strong magnetic field but a weak electric field.

right next to it, put a small probe with a high voltage that radiates
a strong electric field but a weak magnetic field.

Phased correctly these two should be an efficient EM radiator....

But they are not...

My office opens onto a weld shop. When the weldor[1] guy strikes a

300 amp arc, my monitor screen distorts.

Cheers!
Rich
[1] weldor: a guy who uses a welder.
welder: the machine the weldor uses.

 

[Phil Allison]

"Greegor"

metal defective?

** So YOU are just like Joe - is a mental defective who get his kicks
out of wasting the time of good people.



..... Phil

 

[Greegor]

On May 3, 9:14 am, "Phil Allison" <phi...@tpg.com.au> wrote:

Joe is a metal defective < snip

metal defective?

Is that related to a strain gauge?

 

[Ian Field]

"Greegor" <greegor47@gmail.com> wrote in message
news:1ba83be4-ac37-433a-b67b-64a3b7f81412@f2g2000yqf.googlegroups.com...
On May 3, 9:14 am, "Phil Allison" <phi...@tpg.com.au> wrote:

Joe is a metal defective < snip

metal defective?

Is that related to a strain gauge?

-----------------------


Screw loose.

 

[George Herold]

On May 5, 3:54 am, Rich Grise <ri...@example.net.invalid> wrote:

Mark wrote:
On May 4, 5:02 am, Uwe Hercksen <herck...@mew.uni-erlangen.de> wrote:
John Larkin schrieb:

A coil doesn't have to be resonated to radiate EM waves. Resonating it
just reduces the load on the AC power supply.

a coil would radiate a (strong) magnetic field with 60 Hz, but a very
weak electric field. For an efective radiation of EM waves, you would
need the electric and magnetic fields together, with balanced strength..
Otherwise the EM waves could not work over larger distances.

thought experiment..

take a small coil with a large current that radiates as you say a
strong magnetic field but a weak electric field.

right next to it, put a small probe with a high voltage that radiates
a strong electric field but a weak magnetic field.

Phased correctly these two should be an efficient EM radiator....

But they are not...

My office opens onto a weld shop. When the weldor[1] guy strikes a
300 amp arc, my monitor screen distorts.

Cheers!
Rich
[1] weldor: a guy who uses a welder.
    welder: the machine the weldor uses.- Hide quoted text -

- Show quoted text -

Welder's of the female persuasion are called,
weldar?

George H.

 

[Joe Snodgrass]

On May 5, 3:54 am, Rich Grise <ri...@example.net.invalid> wrote:

Mark wrote:
On May 4, 5:02 am, Uwe Hercksen <herck...@mew.uni-erlangen.de> wrote:
John Larkin schrieb:

A coil doesn't have to be resonated to radiate EM waves. Resonating it
just reduces the load on the AC power supply.

a coil would radiate a (strong) magnetic field with60Hz, but a very
weak electric field. For an efective radiation of EM waves, you would
need the electric and magnetic fields together, with balanced strength..
Otherwise the EM waves could not work over larger distances.

thought experiment..

take a small coil with a large current that radiates as you say a
strong magnetic field but a weak electric field.

right next to it, put a small probe with a high voltage that radiates
a strong electric field but a weak magnetic field.

Phased correctly these two should be an efficient EM radiator....

But they are not...

My office opens onto a weld shop. When the weldor[1] guy strikes a
300 amp arc, my monitor screen distorts.

Cheers!
Rich
[1] weldor: a guy who uses a welder.
    welder: the machine the weldor uses.

I'm surprised you computer doesn't crash.

 

[Fredxx]

Rich Grise wrote:

Mark wrote:
On May 4, 5:02 am, Uwe Hercksen <herck...@mew.uni-erlangen.de> wrote:
John Larkin schrieb:

A coil doesn't have to be resonated to radiate EM waves.
Resonating it just reduces the load on the AC power supply.

a coil would radiate a (strong) magnetic field with 60 Hz, but a
very weak electric field. For an efective radiation of EM waves,
you would need the electric and magnetic fields together, with
balanced strength. Otherwise the EM waves could not work over
larger distances.

thought experiment..

take a small coil with a large current that radiates as you say a
strong magnetic field but a weak electric field.

right next to it, put a small probe with a high voltage that radiates
a strong electric field but a weak magnetic field.

Phased correctly these two should be an efficient EM radiator....

But they are not...

My office opens onto a weld shop. When the weldor[1] guy strikes a
300 amp arc, my monitor screen distorts.

Cheers!
Rich
[1] weldor: a guy who uses a welder.
welder: the machine the weldor uses.

Not a new fangled flat screen then!!

 

[Stan Shankman]

Take a 220 volt pigtail, and hook it up to a 60 Hz resonant antenna.
If necessary, use a matching network. That should do it.
- Stan



"Joe Snodgrass" <joe.snod@yahoo.com> wrote in message
news:b10e602f-23ba-4cbf-be87-87adb8bace9a@w10g2000yqa.googlegroups.com...

What do you suppose would be a good way for a person to generate high
intensity RF at 60 Hz? TIA

 

[Bill Beaty]

John Larkin wrote:

A coil doesn't have to be resonated to radiate EM waves.
Resonating it just reduces the load on the AC power supply.

But "high intensity" is another matter. Hard to do with a
reasonable-sized coil, at 60 Hz.

A permanent magnet is analogous to a superconducting coil. But how to
build a 60Hz AC permanent magnet? Simple.

Two permanent magnet rods held side by side, with alike poles
adjacent, will create an extensive magnetic field in the surrounding
volume. But the same two PM rods, if held side by side with unlike
poles adjacent, will create no extensive magnetic field, since the
adjacent opposite poles cancel out (and the field strength at a
distance is ~0)

So, in order to create a "60Hz permanent magnet," spin two PM magnets
so they flip end over end. Let them spin in opposite directions. Use
maglev to suspend them. Spin them in a vacuum chamber. Friction will
be very low, so you can keep them going at 3600RPM by using a small
'kicker' coil. Better use ceramic magnets to avoid inductive
braking. Perhaps use magnetized ferrite spheres rather than rods.

Next, create a quarter-wave radiator. Build more of the levitated-
bar-magnet devices. And more. Build a vast array which covers
thousands of square miles of landscape. If the phases of the
flipping ceramic magnets are adjusted, you can have strong N/S poles
appearing and vanishing at 60Hz along the border of the array. Or let
those poles rotate around the array if you prefer (and radiate circ
polarized 60Hz RF.) The output will rival that of a gigantic
superconducting loop antenna.

And once the array grows large enough, radiation resistance will start
slowing the magnets. You'll have to add more microwatts to each
kicker coil.

With even a small version of this device, probably we could use it as
the stator of an induction motor, with a large number of spinning
squirrel-cage rotors nearby, each running a bit below 3600RPM.

Such a rotor would benefit from having long "antennas" to couple the
rotor to the ambient 60Hz b-field, "antennas" in the form of long rods
composed of laminated iron sheets, or perhaps clusters of iron cable.

Antennas for picking up Mag-tricity waves!



((((((((((((((((((((((( ( ( (o) ) ) )))))))))))))))))))))))
William J. Beaty Research Engineer
beaty, chem washington edu UW Chem Dept, Bagley Hall RM74
billb, eskimocom Box 351700, Seattle, WA 98195-1700
ph 206-543-6195 http://staff.washington.edu/wbeaty/

 

[Rich Grise]

Bill Beaty wrote:

John Larkin wrote:
A coil doesn't have to be resonated to radiate EM waves.
Resonating it just reduces the load on the AC power supply.

But "high intensity" is another matter. Hard to do with a
reasonable-sized coil, at 60 Hz.

A permanent magnet is analogous to a superconducting coil. But how to
build a 60Hz AC permanent magnet? Simple.

Two permanent magnet rods held side by side, with alike poles
adjacent, will create an extensive magnetic field in the surrounding
volume. But the same two PM rods, if held side by side with unlike
poles adjacent, will create no extensive magnetic field, since the
adjacent opposite poles cancel out (and the field strength at a
distance is ~0)

So, in order to create a "60Hz permanent magnet," spin two PM magnets
so they flip end over end. Let them spin in opposite directions. Use
maglev to suspend them.

Wait a minute. Maglev on a pair of spinning bar magnets? Wouldn't they
cancel each other out?

Thanks,
Rich

 

[bill]

On 7/22/2011 1:16 PM, Rich Grise wrote:

Bill Beaty wrote:

John Larkin wrote:
A coil doesn't have to be resonated to radiate EM waves.
Resonating it just reduces the load on the AC power supply.

But "high intensity" is another matter. Hard to do with a
reasonable-sized coil, at 60 Hz.

A permanent magnet is analogous to a superconducting coil. But how to
build a 60Hz AC permanent magnet? Simple.

Two permanent magnet rods held side by side, with alike poles
adjacent, will create an extensive magnetic field in the surrounding
volume. But the same two PM rods, if held side by side with unlike
poles adjacent, will create no extensive magnetic field, since the
adjacent opposite poles cancel out (and the field strength at a
distance is ~0)

So, in order to create a "60Hz permanent magnet," spin two PM magnets
so they flip end over end. Let them spin in opposite directions. Use
maglev to suspend them.

Wait a minute. Maglev on a pair of spinning bar magnets? Wouldn't they
cancel each other out?

Thanks,
Rich

Is it April First already?

Bill K7NOM

 

[m II]

Joe Snodgrass wrote:

What do you suppose would be a good way for a person to generate high
intensity RF at 60 Hz? TIA

My neighbours were very impressed with the homebuilt Jacob's ladder I
built using a 16kv neon transformer. Two straightened coathangers lead
the arc upwards to a width of about 8 inches, where it was extinguished
and a new one started at the bottom of the 'V', where the wires were
about an inch apart.

Hot air around the arc made it rise.

That was pre-cable, so the area of impressed neighbours covered at least
a half block area.

Doing stuff that interferes with TV and radio is probably against the law.


mike