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Published on Mar 8, 2011
In response to my question about the sound I heard on 10 meters someone suggested it may have been an Ionosonde...I searched the internet and found tons of info on what they are but had a helluva time finding a sound example. Finally found one on the NASA site: http://radiojove.gsfc.nasa.gov/observ... Lots of interesting material there, Check it out! Further info on Ionosonde transmitting can be found here: http://www.hfunderground.com/wiki/Ion... I am not to convinced that is what I was hearing although I have heard these "tweep" sounds many times myself and always wondered what they were! One question at least answered....