Thanks to K6DGW K6PJV, G3YMC, WB1HGA, K7UP, K6DGW and others that responded to my query. I suspect it is OTH radar, the suggestion of K6DGW. Do a Goggle search using oth radar, lots of interesting leads, including these:
http://en.wikipedia.org/wiki/Over-the-horizon_radar http://www.agu.org/sci_soc/prrl/prrl9825.html This racket is not always on 7040 KHz, it varies but the spacing of signals seems to be 10.66 KHz. I now remember such signals back in the 60s and 70s. I used to have a model 15 and did a lot of RTTY so I know what FSK sounds like. I still love my K1 but am thinking of building a K2 this summer. 73, Ty, W1TF, K1 #1423 __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com