Why is it termed "SHORT" WAVE ?

--
CL -- I doubt, therefore I might be !

On Wed, 5 Oct 2005 08:08:01 -0700, "Caveat Lector"
wrote:


Why is it termed "SHORT" WAVE ?
Meters times Megahertz equals 300.

"David" wrote in message
news
On Wed, 5 Oct 2005 08:08:01 -0700, "Caveat Lector"
wrote:


Why is it termed "SHORT" WAVE ?
Meters times Megahertz equals 300.


Then why is 300 kilohertz and 3000 kilohertz termed Medium Wave ???

--
CL -- I doubt, therefore I might be !

Why is it termed "SHORT" WAVE ?

Because it is shorter than medium wave, which in turn is shorter than
long wave - back when these types of radio signals were the commonly
used wavelengths.

Of course, now with microwaves and picowaves, the name becomes much
less meaningful. In fact, the term H(igh) F(frequency), which seems to
have replaced SW for many purposes, is not really accurate either.

Bruce Jensen

"bpnjensen" wrote in message
oups.com...
Why is it termed "SHORT" WAVE ?

Because it is shorter than medium wave, which in turn is shorter than
long wave - back when these types of radio signals were the commonly
used wavelengths.

Of course, now with microwaves and picowaves, the name becomes much
less meaningful. In fact, the term H(igh) F(frequency), which seems to
have replaced SW for many purposes, is not really accurate either.

Bruce Jensen


Very good Bruce -- indeed it is an ancient term carried over to this very
day

From Wikipedia or google


Shortwave radio operates between the frequencies of 3,000 kHz and 30 MHz
(30,000 kHz) and came to be referred to as such in the early days of radio
because the wavelengths associated with this frequency range were shorter
than those commonly in use at that time. An alternate name is HF, or high
frequency.

--
CL -- I doubt, therefore I might be !

Caveat Lector wrote:

"bpnjensen" wrote in message
oups.com...
Why is it termed "SHORT" WAVE ?

Because it is shorter than medium wave, which in turn is shorter than
long wave - back when these types of radio signals were the commonly
used wavelengths.

Of course, now with microwaves and picowaves, the name becomes much
less meaningful. In fact, the term H(igh) F(frequency), which seems to
have replaced SW for many purposes, is not really accurate either.

Bruce Jensen


Very good Bruce -- indeed it is an ancient term carried over to this very
day

From Wikipedia or google

Shortwave radio operates between the frequencies of 3,000 kHz and 30 MHz
(30,000 kHz) and came to be referred to as such in the early days of radio
because the wavelengths associated with this frequency range were shorter
than those commonly in use at that time. An alternate name is HF, or high
frequency.

Some sources disagree on where shortwave begins. And, NASWA considers shortwave
to begin at 2000 kHz.

dxAce
Michigan
USA

http://www.iserv.net/~n8kdv/dxpage.htm

On Wed, 05 Oct 2005 14:21:26 -0400, dxAce
wrote:



Caveat Lector wrote:

"bpnjensen" wrote in message
oups.com...
Why is it termed "SHORT" WAVE ?

Because it is shorter than medium wave, which in turn is shorter than
long wave - back when these types of radio signals were the commonly
used wavelengths.

Of course, now with microwaves and picowaves, the name becomes much
less meaningful. In fact, the term H(igh) F(frequency), which seems to
have replaced SW for many purposes, is not really accurate either.

Bruce Jensen


Very good Bruce -- indeed it is an ancient term carried over to this very
day

From Wikipedia or google

Shortwave radio operates between the frequencies of 3,000 kHz and 30 MHz
(30,000 kHz) and came to be referred to as such in the early days of radio
because the wavelengths associated with this frequency range were shorter
than those commonly in use at that time. An alternate name is HF, or high
frequency.

Some sources disagree on where shortwave begins. And, NASWA considers shortwave
to begin at 2000 kHz.

dxAce
Michigan
USA

http://www.iserv.net/~n8kdv/dxpage.htm

All FCC bands break on 3s.

David wrote:

On Wed, 05 Oct 2005 14:21:26 -0400, dxAce
wrote:



Caveat Lector wrote:

"bpnjensen" wrote in message
oups.com...
Why is it termed "SHORT" WAVE ?

Because it is shorter than medium wave, which in turn is shorter than
long wave - back when these types of radio signals were the commonly
used wavelengths.

Of course, now with microwaves and picowaves, the name becomes much
less meaningful. In fact, the term H(igh) F(frequency), which seems to
have replaced SW for many purposes, is not really accurate either.

Bruce Jensen


Very good Bruce -- indeed it is an ancient term carried over to this very
day

From Wikipedia or google

Shortwave radio operates between the frequencies of 3,000 kHz and 30 MHz
(30,000 kHz) and came to be referred to as such in the early days of radio
because the wavelengths associated with this frequency range were shorter
than those commonly in use at that time. An alternate name is HF, or high
frequency.

Some sources disagree on where shortwave begins. And, NASWA considers shortwave
to begin at 2000 kHz.


All FCC bands break on 3s.

So?

You'd better go back to planning the revolution. But please, do it somewhere else,
stem.

dxAce
Michigan
USA

"David" wrote in message
...
On Wed, 05 Oct 2005 14:21:26 -0400, dxAce
wrote:



Caveat Lector wrote:

"bpnjensen" wrote in message
oups.com...
Why is it termed "SHORT" WAVE ?

Because it is shorter than medium wave, which in turn is shorter than
long wave - back when these types of radio signals were the commonly
used wavelengths.

Of course, now with microwaves and picowaves, the name becomes much
less meaningful. In fact, the term H(igh) F(frequency), which seems
to
have replaced SW for many purposes, is not really accurate either.

Bruce Jensen


Very good Bruce -- indeed it is an ancient term carried over to this
very
day

From Wikipedia or google

Shortwave radio operates between the frequencies of 3,000 kHz and 30 MHz
(30,000 kHz) and came to be referred to as such in the early days of
radio
because the wavelengths associated with this frequency range were
shorter
than those commonly in use at that time. An alternate name is HF, or
high
frequency.

Some sources disagree on where shortwave begins. And, NASWA considers
shortwave
to begin at 2000 kHz.

dxAce
Michigan
USA

http://www.iserv.net/~n8kdv/dxpage.htm

All FCC bands break on 3s.


Ah, but can you tell us WHY they break on 3's?

"Brenda Ann" wrote in message
...

"David" wrote in message
...
On Wed, 05 Oct 2005 14:21:26 -0400, dxAce
wrote:



Caveat Lector wrote:

"bpnjensen" wrote in message
oups.com...
Why is it termed "SHORT" WAVE ?

Because it is shorter than medium wave, which in turn is shorter than
long wave - back when these types of radio signals were the commonly
used wavelengths.

Of course, now with microwaves and picowaves, the name becomes much
less meaningful. In fact, the term H(igh) F(frequency), which seems
to
have replaced SW for many purposes, is not really accurate either.

Bruce Jensen


Very good Bruce -- indeed it is an ancient term carried over to this
very
day

From Wikipedia or google

Shortwave radio operates between the frequencies of 3,000 kHz and 30
MHz
(30,000 kHz) and came to be referred to as such in the early days of
radio
because the wavelengths associated with this frequency range were
shorter
than those commonly in use at that time. An alternate name is HF, or
high
frequency.

Some sources disagree on where shortwave begins. And, NASWA considers
shortwave
to begin at 2000 kHz.

dxAce
Michigan
USA

http://www.iserv.net/~n8kdv/dxpage.htm

All FCC bands break on 3s.


Ah, but can you tell us WHY they break on 3's?




OHHH good question

I suspect its because of the formula
wavelength = 300 / frequency in MHz

So when you divide out the 300/freq

It comes out in even metric units



e.g., ELF Extremely Low Frequency 3 - 30 Hz 100,000 - 10,000 km
SLF Super Low Frequency 30 - 300 Hz 10,000 - 1,000 km
ULF Ultra Low Frequency 300 - 3000 Hz 1,000 - 100 km
VLF Very Low Frequency 3 - 30 kHz 100 - 10 km
LF Low Frequency 30 - 300 kHz 10 - 1 km
MF Medium Frequency 300 - 3000 kHz 1 km - 100 m
HF High Frequency 3 - 30 MHz 100 - 10 m
VHF Very High Frequency 30 - 300 MHz 10 - 1 m
UHF Ultra High Frequency 300 - 3000 MHz 1 m - 10 cm
SHF Super High Frequency 3 - 30 GHz 10 - 1 cm
EHF Extremely High Frequency 30 - 300 GHz 1 cm - 1 mm



I guess, therefore I am