On Jun 17, 3:56 pm, "Dave" wrote:
"Radium" wrote in message

ups.com... Hi:

What is the minimum amount of photons-per-second needed for a 150 KHz
AM radio carrier wave to transmit audio signals? Around 20,000-photons-
per-second?

Thanks,

Radium

you should have stayed with the alt.sci or sci.physics groups, you don't
know what you are getting your self in for here!

as in 'go fish' ~ RHF

In rec.radio.amateur.antenna Radium wrote:
Hi:

What is the minimum amount of photons-per-second needed for a 150 KHz
AM radio carrier wave to transmit audio signals? Around 20,000-photons-
per-second?

The answer is not simple because any given photon only has one
frequency and one energy.

So at any given time, you need some number of photons at different
frequencies to get the frequency components and some number of
photons at each frequency component to the the amplitude components
of the total signal.

Did you get tired of everyone calling you a clueless moron on sci.physics
and sci.physics.electromagnetics and think you would try here?

--
Jim Pennino

Remove .spam.sux to reply.

On Jun 17, 4:05 pm, wrote:

So at any given time, you need some number of photons at different
frequencies to get the frequency components and some number of
photons at each frequency component to the the amplitude components
of the total signal.

Well, in FM the peak-to-peak amplitude remains constant but the energy
[frequency] varies.

In AM, the frequency remains constant but the peak to peak amplitude
varies.

In rec.radio.amateur.antenna Radium wrote:
On Jun 17, 4:05 pm, wrote:

So at any given time, you need some number of photons at different
frequencies to get the frequency components and some number of
photons at each frequency component to the the amplitude components
of the total signal.

Well, in FM the peak-to-peak amplitude remains constant but the energy
[frequency] varies.

In AM, the frequency remains constant but the peak to peak amplitude
varies.

You've never seen what an AM signal looks like on a spectrum analyzer,
have you?

Go look at: http://www.fas.org/man/dod-101/navy/docs/es310/AM.htm

Hot flash for you, the AM modulation process creates other frequencies.

If you only have one frequency, you don't have modulation of any
kind.


--
Jim Pennino

Remove .spam.sux to reply.

In article ,
wrote:

Snip

Plonk

--
Telamon
Ventura, California

On Jun 17, 4:45 pm, wrote:
In rec.radio.amateur.antenna Radium wrote:

On Jun 17, 4:05 pm, wrote:
So at any given time, you need some number of photons at different
frequencies to get the frequency components and some number of
photons at each frequency component to the the amplitude components
of the total signal.
Well, in FM the peak-to-peak amplitude remains constant but the energy
[frequency] varies.
In AM, the frequency remains constant but the peak to peak amplitude
varies.

You've never seen what an AM signal looks like on a spectrum analyzer,
have you?


Scroll down to "A More Realistic Spectrum"
- Go look at:http://www.fas.org/man/dod-101/navy/docs/es310/AM.htm
Check-out the two side-by-side Images


Hot flash for you, the AM modulation process creates other frequencies.

If you only have one frequency, you don't have modulation of any
kind.

--
Jim Pennino

Remove .spam.sux to reply.

In article . com,
Radium wrote:

Snip

Go away cross posting nut case.

Plonk

--
Telamon
Ventura, California

On Sun, 17 Jun 2007 15:19:59 -0700, Radium
wrote:

What is the minimum amount of photons-per-second needed for a 150 KHz
AM radio carrier wave to transmit audio signals? Around 20,000-photons-
per-second?

That one is real simple:
2 photons (of appropriate amplitude, hence color) at most 3.333 (less
would be better, but not too much less) microseconds apart.

Feel free to desire more, but you asked for the minimum. If you want
more audio (sideband) content, that will certainly drive up the count
too.

Now, how's your quantum efficiency these days? (Use it to boost the
count higher.)

73's
Richard Clark, KB7QHC

On Jun 17, 10:37 pm, Richard Clark wrote:
On Sun, 17 Jun 2007 15:19:59 -0700, Radium
wrote:

What is the minimum amount of photons-per-second needed for a 150 KHz
AM radio carrier wave to transmit audio signals? Around 20,000-photons-
per-second?

I keep trying and trying to count the 150kc photons ^sec by scooping
them up on a wire and displaying them across a digital osillyscope.
but the instant they interact with the wire they are transformed into
electrons... And those, dibble dabble damned electrons go hide amongst
the other electrons on the surface of the conductor and mock me...
They keep printing, "Photon, photon, who's got the photon, nyaa, nyaa,
nya, nayaa, nyaaaaaaa" across the computer screen...
So I said to myself, 'I'll teach em' - and hooked up a diode and a
speaker to the end of the antenna wire and be damned if they hadn't
transformed into phonons... Now they were mocking me by chanting,
"Who let the dogs out, who, hoooooo..."
So, then I said, 'I'll teach ya', and I hooked up a transmitter to the
end of the wire with a SWR meter and pumped 150kc photons into the
wire... The SWR meter showed infinity to one, or was it one to
infinity, or was that, oh jeez, now I'm confused... *&^()$#@* SWR
meter lies!

I need a beer...

denny / k8do

Denny wrote:

...
I keep trying and trying to count the 150kc photons ^sec by scooping
them up on a wire and displaying them across a digital osillyscope.
...
denny / k8do

Denny:

That is just plain silly.

I use a paper coated with a photographic emulsion to record the photons
striking the light sensitive emulsion.

Only problem, background radiation fogs the film before recording the
photons--I am working on resolving that minor problem ...

Regards,
JS