sci.physics.electromag

K7ITM wrote in
/group/ /msg/29d5341be8ff65fe
:

> Why do you say that "UHFs tend to the best for extremely long distance
> reception"? Have a look at the basic equation governing line-of-sight
> reception.

Lower frequencies are absorbed by charged particles. Ionized zones [such
as Earth ionosphere and the heliosphere around the solar system] tend to
block low-frequency radio waves. That is why UHF is the best.

UHFs are the “sweet-spot” of radio waves. They are high-frequency-enough
not to be attenuated by objects that block longer-wave radio signals yet
low-frequency-enough not to be attenuated by objects that block infrared
rays, SHFs, or EHFs.

> Why do you not answer your own question? It sounds to me like as
> reasonable a premise for a science fiction book as many that have been
> successful. You could perhaps spin it into quite an interesting
> story. You've already started with a premise that's so far from -- so
> very, very far from -- the current realities or even the dreams of
> people designing receivers that you may as well suppose you're going
> to receive whatever your wildest imagination might come up with.
> Since there is a nearly countless number of stars in the known
> universe, and since a large percentage of them could be planetary
> systems, each with the possibility of emitting interesting amplitude
> modulated carriers, your choices are pretty near limitless. Wow! Let
> your imagination run wild. It obviously did when you posed the
> question; you may as well let it run as wild with the answer. Back to
> you, Nonex!

Okay, I will let my imagination run wild.

I would hear scary stuff on the space station’s radio.

I used to often play my Nintendo when it was connected to channel 3.
However, I was change the TV channel to 4. I could see the video of the
game but it was fuzzy and covered in grains. The music of the game was
absent, and instead was filled with frightening-yet-enjoyable tones
[sounding like a buzzer, lawn mower, or electric shaver] along with a
faint audio of what was being discussed on the channel 4 news.

I would hear something similar on my 2 GHz AM DX receiver in space.

Also, whenever there is drill or an actually emergency, the Emergency
Alert System [EAS] plays their music. First they play the boring
low-pitch square-wave tones. Then they play the high-pitched,
terrifying, enjoyable, psychedelic sine-wave tones.

I would also hear something similar to the second higher-pitched set of
EAS tones on my 2 GHz AM DX receiver in space but not the 1st lower
pitched tones. The lower-pitched 1st tones don’t at all resemble what I
would hear on the AM receiver.

In addition, I would hear sounds that are similar to the following
terrifying-yet-enjoyable tones present on this keyboard’s 100 sound tone
back:

/img/

#75 “cosmic sound” when the volume is at maximum

#76 “telephone” when the volume is at minimum and I press keys from the
7th black key [from the left] or lower. If any key that is right of the
7th black key is pressed, the sound is totally different and will not
even remotely resemble anything I would hear on the AM receiver.

#81 “marimba” when the volume is at minimum and I press the lowest or
highest key separately – especially if I first press the lowest key,
then let go, and then immediately press the highest key afterwards.

#85 “afro percussion” when the volume is at maximum and I smoothly slide
my hand from lowest to highest note and then highest to lowest note or
if I play notes two or more notes with one no higher than the 7th black
key from the left and the other note no lower than the 10th key from the
right. Actually any combinations of this tone will resemble what I would
hear on my 2 GHz receiver.

#96 “bass/piano” when the volume is at maximum and I press the lowest key.

All the sounds I hear on the receiver are those that result from the
radio waves emitted by the magnetic fields of objects in the distant
cosmos -- such as magnetars. At times, when the magnetic objects cause
magnetic vibrations at an RF-rate, they cause radio waves to be
generated. If the rates include 2-billions-vibrations-per-second, then
my receiver will demodulate the 2 GHz parts and I can hear the signals
-- provided that the demodulations result in frequencies anywhere from
20 to 20,000 Hz [the human hearing range].

> Oh, and by the way, "spamming" comes, in one form, from posting too
> many places; I've trimmed off a whole bunch of groups for this reply.
> By my way of thinking, you're being pretty generous with yourself
> saying you don't spam.

I only posted to relevant NGs.