[Lowfer] strange VLF transmission

[Garry Hess]

Doug, I wonder how precise the center frequency of 18 kHz was? 17.8 kHz 
is a frequency where I've often heard wideband TACAMO transmissions. 
They often (always?) begin with a burst of 50 baud RTTY, then send wide 
and very wide signals with short off-time gaps in-between. I don't 
recall those transmissions being as short as 20 seconds but I suppose 
they could be. I've generally seen them run a few minutes. That makes 
reporting them hard because often as you're writing to the lowfer 
mailing list the signals disappear. It's also hard to catch the RTTY 
identifier because there is no schedule to the transmissions. You just 
have to be watching when they start.
-- 
73, Garry, K3SIW, EN52ta, Elgin, IL