Radium hath wroth:

On Jul 15, 5:38 pm, Jeff Liebermann wrote:

Radium hath wroth:

AFAIK, the main issue with AM is that it is much more vulnerable to
magnetic disruptions than FM.

Wrong. Take a magnet, any magnet. Wave it around your AM or FM
radio. Hear anything different? You won't. Therefore, forget about
magnetic disturbances.

That's because this magnet isn't vibrating fast enough. If it were to
vibrate at the carrier frequency, you would most likely hear
something.

Actually, what you'll hear is whatever is driving the magnet at the
carrier frequency. For example, if you shove the magnet into a
solenoid coil, and drive the coil at 1MHz, the magnet will move very
slightly at 1MHz. However, the crud that you'll hear at 1MHz is
coming from the solenoid coil, not the magnet. If the magnetic field
cuts across some wire, that happens to be the antenna of your 1MHz
receiver, then yes, you'll hear something, but only if it's moving at
1MHz.

The AM audio cause by lightning is so boring.

If you've ever been hit by lightning, I don't think you'll find it
very boring. With 8 million hits per day, chances are good that
you'll get hit. Ummm... could you step outside for a moment?

All you get are clicks
and pops.

Oh no. It's much better than that. You get snap, crackle, pop,
crash, hiss, zap, buzz, braaaaaap, and other noises, all to the
accompanyment of loud thunder and the smell of ozone. It can also
make the fur stand up on your back. If all you hear are clicks and
pops, your receiver is comatose.

When the sun emits a prominence, that prominence causes high-power
waves of magnetic energy in the RF region to be emitted. These waves
can be heard on the AM radio on Earth. This is the sound that affects
CBs and other radio receivers using AM.

Ummm... coronal mass ejections and solar flares are particles, not
radio waves. The interference to radio communications is mostly from
these particles effects on the ionospheric layers. There is some RF
involved, but it's at microwave frequencies and requires a big radio
telescope to see.
http://www.nrao.edu/pr/2001/radiocme/

The main reason why anyone would prefer FM over AM is if they can't
handle these terrifying sounds w/out going hysterical.

Hmmm... All my communications radios except the aircraft navcom stuff
is FM. Maybe that explains why I'm spending time explaining to you
the basics. I'll try not to get too hysterical.

There are some who have had emotionally-strong experiences with these
sounds (...)

Not a problem. Everyone knows that too much RF rots the brain and
causes cancer of the vocabulary. Anyone involved in RF has to be
insane or will shortly be insane.

(chop...)

We tend to enjoy what we fear. At times.

I don't fear anything, so that might explain why I'm not enjoying
myself.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Jeff Liebermann wrote:
If you've ever been hit by lightning, I don't think you'll find it
very boring. With 8 million hits per day, chances are good that
you'll get hit. Ummm... could you step outside for a moment?

Reminds me of an afternoon when I was 600 ft up a 1,000 ft TV tower
climbing on the inside. The tower took a hit and the lightning bolt
followed a aircraft cable hoist line down the inside of the tower. Right
between my legs.

On Jul 15, 6:58 pm, Jeff Liebermann wrote:

Radium hath wroth:

The AM audio cause by lightning is so boring.
All you get are clicks
and pops.

Oh no. It's much better than that. You get snap, crackle, pop,
crash, hiss, zap, buzz, braaaaaap, and other noises, all to the
accompanyment of loud thunder and the smell of ozone. It can also
make the fur stand up on your back.

One thing that I do like are the sharp sawtooth wave patterns that
show up on FM video receivers whenever lightning strikes. FM video
receivers receive Y [luminance] signals present on FM radio waves.
Electrical disturbances affect the FM video receiver causing those
beautifaul zapping and buzzing sawtooth patterns on the screen.

"Radium" wrote in message
oups.com...
| On Jul 15, 6:58 pm, Jeff Liebermann wrote:
|
| Radium hath wroth:
|
| The AM audio cause by lightning is so boring.
| All you get are clicks
| and pops.
|
| Oh no. It's much better than that. You get snap, crackle, pop,
| crash, hiss, zap, buzz, braaaaaap, and other noises, all to the
| accompanyment of loud thunder and the smell of ozone. It can also
| make the fur stand up on your back.
|
| One thing that I do like are the sharp sawtooth wave patterns that
| show up on FM video receivers whenever lightning strikes. FM video
| receivers receive Y [luminance] signals present on FM radio waves.
| Electrical disturbances affect the FM video receiver causing those
| beautifaul zapping and buzzing sawtooth patterns on the screen.

The only FM on standard TV is the audio. Video is vestigial sideband AM.

BTW my grand daughter had that figured out by the time she was 12 y.o.

"NotMe" wrote in message
...

"Radium" wrote in message
oups.com...
| On Jul 15, 6:58 pm, Jeff Liebermann wrote:
|
| Radium hath wroth:
|
| The AM audio cause by lightning is so boring.
| All you get are clicks
| and pops.
|
| Oh no. It's much better than that. You get snap, crackle, pop,
| crash, hiss, zap, buzz, braaaaaap, and other noises, all to the
| accompanyment of loud thunder and the smell of ozone. It can also
| make the fur stand up on your back.
|
| One thing that I do like are the sharp sawtooth wave patterns that
| show up on FM video receivers whenever lightning strikes. FM video
| receivers receive Y [luminance] signals present on FM radio waves.
| Electrical disturbances affect the FM video receiver causing those
| beautifaul zapping and buzzing sawtooth patterns on the screen.

The only FM on standard TV is the audio. Video is vestigial sideband AM.

BTW my grand daughter had that figured out by the time she was 12 y.o.


Analog satellite still uses FM, but there is very little of that left. 30MHz
wide channels. Think there used to be one version of SECAM (in France, IIRC)
that used FM video. That's gone now, too.

On Jul 16, 7:36 pm, "Brenda Ann" wrote:

Analog satellite still uses FM, but there is very little of that left. 30MHz
wide channels. Think there used to be one version of SECAM (in France, IIRC)
that used FM video. That's gone now, too.

Actually SECAM also uses AM for the luminance signal. However, it uses
FM for the color [chroma] signal.

On Jul 16, 6:07 pm, "NotMe" wrote:

The only FM on standard TV is the audio. Video is vestigial sideband AM.

I want it to be the opposite.

In rec.radio.amateur.antenna Radium wrote:
On Jul 16, 6:07 pm, "NotMe" wrote:

The only FM on standard TV is the audio. Video is vestigial sideband AM.

I want it to be the opposite.

I want you to go away until you at least have a high school education
in science and techology and learn how to use Google.

I don't think either is going to happen.

--
Jim Pennino

Remove .spam.sux to reply.

On Wed, 18 Jul 2007 00:45:00 GMT, wrote in
:

In rec.radio.amateur.antenna Radium wrote:
On Jul 16, 6:07 pm, "NotMe" wrote:

The only FM on standard TV is the audio. Video is vestigial sideband AM.

I want it to be the opposite.

I want you to go away until you at least have a high school education
in science and techology and learn how to use Google.

I don't think either is going to happen.

Probably not, but that's Usenet.

--
Best regards, FAQ FOR CINGULAR WIRELESS:
John Navas http://en.wikibooks.org/wiki/Cingular_Wireless_FAQ

"Radium" wrote in message
oups.com...

One thing that I do like are the sharp sawtooth wave patterns that
show up on FM video receivers whenever lightning strikes.

When, pray tell, have you ever seen an "FM video receiver"?

Bob M.