"K1TTT" wrote
...
On Dec 25, 2:57 pm, joe wrote:
K1TTT wrote:

distance itself does not affect sidebands.

frequency dependent dispersion in the ionosphere can affect sidebands
and the mark/space tones of rtty differently over short periods
causing differential fading and distortion.

One could also consider selective fading.

that's just another name for it... i threw in the big words because
i'm sure that mr.b will look them up out of context and find all sorts
of hilarious ways to recombine them.

http://dj4br.home.t-link.de/ssb3e.htm
I am sure that the all my questions will be explained with the ionosphere.
The first my question was on the frequency doubling.
But yours selective fading means for me "distance itself does affect
sidebands". So you are very helpfull.

For me all names are clear.
Ampere discovered the electrons and give them name "current elements".
Maxwell used "electric particless". But you all admire Heaviside's fluid
(massles and incompressible). Do you see the difference?
S*