[RFI] Two tone QRM on 7239 kHz

[Rick Karlquist]

A 2 tone signal has been intermittently on 7239 kHz.
On Saturday, it was there for hours, and necessitated
moving the swap net off of 7240.  Today, it was there
again for a while.  I am fairly sure it is nowhere near
the SF bay area or Lake Tahoe areas, as it isn't very
strong in either and doesn't vary with location.  Has
anyone in other areas heard this signal at high strength?

Rick N6RK