[Amps] 160m RTTY

[Peter Chadwick]

Tom said (in the plexiglas thread, but we're wandering a bit from that)
>The reason RTTY isn't on 160 is it doesn't work very well on 
160. Multipath kills it.<


I don't know how bad the multipath is, and obviously, it's going to depend on the path length and so on. However, SS Loran (Skywave Synchronised) LORAN was used in WW2 operating in 160m (How many of us are old enough to remember LORAN on top band?) SS Loran was used with sync from one end of the Mediterranean to the other to provide navigation for bombing raids into Romania, and also in the Atlantic for convy escort (see the MIT Radiation Lab. series)  The Loran pulses were a lower prf than 45.5 baud RTTY signal, but were quite short, so multipath would smear them out quite a lot. However, it was claimed that they could get to within 400 yards in mid Atlantic, which suggests around 1 microsecond of uncertainty, using stations in the UK, Canada and I believe, Bermuda.
Tom, comment, please?
73
Peter G3RZP