[CQ-Contest] CQWWSSB weird noises on 10 M and other bands

[kq2m at kq2m.com]

On Saturday in CQWWSSB I heard some very strange noises on 10.

One was a constant multi-toned carrier that was simultaneously 
transmitting between about 28.815 mhz and 29.125 mhz.  It was extremely 
loud and peaking generally NE.  It completely wiped out that entire 
freq. range.  No tried to cq within it.

The other type of noise was what I'll call a "Squiggler" which was loud 
and about 3 - 5 khz wide.  It sounds "squiggly" - with audio like 
someone was very rapidly shifting their tuning dial back and forth while 
transmitting, but doing it within an extremely narrow range of 
frequencies - maybe 500 - 1000 hz wide.  If you took a pencil and 
rapidly moved it back and forth repeatedly in a narrow space on a piece 
of paper, you would see "squiggles" - a physical representation of the 
audio that I was hearing.

The squigglers were loud and annoying and then would drift in and out of 
the frequency very, very slowly and obliterate any callers for several 
minutes at a time.  This happened all over 10 M but also made brief 
appearances on 15 and 20.  I have never heard this before.  It was NOT 
at all the spurs and carrier type signals to which I am accustomed.

Any idea what these are and where they are coming from?

Tnx & 73


Bob, KQ2M