Bob Dobbs wrote:
gnals from relatively local stations.

I sometimes get a long period QSB during the day,
noticeable with KFI-HD 640 from about 120 miles away up in LA,
such that it loses HD sync-lock for a while,
but for the most part, it's quite subtle, or imperceptible.
Nighttime is a whole nother situation!


The skywave gets 180 degrees out of phase with the groundwave sometimes.
They can cancel each other out. Usually though, the reflection is
asymmetric and only partial cancellation happens. This when you where
the flanger effect and the digital sidebands. KFI does it up here too.