We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember dxAce saying
something like:

Who knows what happens to the signal on its bouncy journey across 1000
miles of open ocean.

Well, it sure doesn't shift from USB to LSB on its trip! You have a receiver
problem.

Looks like you were right in that. I was playing with the IF shift on
USB and LSB while on 7590 - at that time, both sidebands were in
evidence then the lower sideband disappeared when I went back to it,
leaving only the upper one which is now coming in strongly.

Quite why it was showing that effect, I don't know. Honestly, it was
coming in clearly on what appeared to be LSB prior to that.

Thanks for the nudge.

No thanks to Telemon.
--

Dave