I have been on WSPR for a few weeks now and have a lot of detections, but no one hears my station.

I know I am xmiting as I can get the "tune tone" on another radio.

I have read, and tried all of the "tricks" that I can find.

Time is accurate.
Put ferrites on the USB cable.
Audio levels are good (can hear tone on another radio).
antenna SWR is < 1.1 : 1

I am at a loss as to what to do???

Thanks in advance,

Dave
KK6VQC