----- Original Message ----- From: <joldenburg2 at new.rr.com> Subject: Re: [Milsurplus] Strange Sound On Air- Data Burst? > Sounds like a chirpsounder: > > http://en.wikipedia.org/wiki/Ionosonde > Could indeed be, but I tend to hear this wherever hams or CBers are getting, ummm... "Froggy" ;-)