On 9 Mar 2005 10:53:51 -0800, "atomicthumbs"
wrote:

Sometimes I use a radioteletype signal to lull myself to sleep. Anyone
else do things like this?

I used to listen to weather balloons - radiosondes - when they used AM
tones on HF. Very eerie series of almost-repeating tones in a strict
rhythm, drifting in and out somewhere around the otherwise silent
reaches of 26MHz in the middle of the night. Occasionally, you'd get
an ionosonde sweeping through.

The balloons are now all on UHF and FM data, so they just go
chuff-chuff-chuff. Not the same, not the same at all.

R