Attached are four stacked
spectrograms of Uwe's signal as received by Paul Nicholson,
DF6NM, OK2BVG and PA1SDB (top to bottom), scaled to the same
time and similar frequency scales. The steps around 2 UT seem
to have left a gap at OK2BVG and DF6NM. In a direct mail, Paul
has sent a series of phase measurements in half hour
intervals, which seem to corroberate the assumption of a phase
step sometime around 2 UT.
The improvements of Uwe's signal
at PA1SDB over the years is indeed impressive. Uwe, can you
perhaps comment on your antenna size and current, then and
now?