"A Comment on Joe’s Paper How many bits are copied in a JT65 transmission" by Klaus von der Heide, DJ5HG Please read the article, it reveals the true state of JT65, and clears up the smoke screens that K1JT has provided us with.
JT65 "Deep Search" is probably the biggest con (bluff) in the history of ham radio. We all know what we call doping in sport arenas. Take away the known info from the computer (calls + locator) and a decode is totally impossible. Actually, doping is done to the extent that the message received via the airwaves is a fraction of the printed message on the computer screen. JT65 Deep Search "copies" two calls, locator and report in 48 seconds…!! This is only possible by "doping" the decoding process with the missing bits, which is exactly what K1JT is doing. Klaus makes it clear that at –27db only one call is possible to transfer in 60 seconds. Well, this is because mathematics can be used to determine the possible data transfer at a given S/N ratio. How can we say this after reading the articles? It will show that the so called Deep Search mode is not a deep search, it is solely a reconstruction module, designed to recreate a fully known message.
Please read this interesting articles by Klaus DJ5HG, presented in Dubus Magazine. Analyzis of Deep Search, an article written for the Swedish ham magazine QTC in November 2007
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