Topband: 160 Meter Propagation

[GEORGE WALLNER]

On Sun, 11 Jan 2009 19:55:13 -0800
  Tree <tree at kkn.net> wrote:
>I have not heard ZS as
> well as I did 11 years ago ... signals have been
> very poor.  I remember ZS4TX's signal coming in very 
>strong almost every night
> for a week or two back 11 years ago.  
> I also remember hearing some echos 
> Haven't heard any of this recently.  

Tree,

While conditions are guaranteed to vary from one cycle to 
another, perhaps there also has been a gradual increase in 
man-made noise around the world, which on TB could create 
the impression of poorer conditions. If we just had a 
long-term calibrated means of measuring ambient noise...

73,

George
AA7JV