I've touched on this before, and John mentioned he had heard powerful data signals within 22m.As recently as last weekend (11/12 March) I hear two such transmissions operating simultaneously. One was obliterating TSN, and another was slightly further up in the mid-band cacophony.
Do we have any idea from where they may emanate? Reports from listeners in different parts of the North American continent (and elsewhere) may be helpful.
Ed