  We have found that there are two distinct emission modes in PSR B0809+74.
Beside its normal and most common mode, the pulsar emits in a significantly
different quasi-stable mode after most or possibly all nulls, occasionally for
over 100 pulses. In this mode the pulsar is brighter, the subpulse separation
is less, the subpulses drift more slowly and the pulse window is shifted
towards earlier longitudes.
  We can now account for several previously unexplained phenomena associated
with the nulling-drifting interaction: the unexpected brightness of the first
active pulse and the low post-null driftrate. We put forward a new
interpretation of the subpulse-position jump over the null, indicating that the
speedup time scale of the post-null drifting is much shorter than previously
thought. The speedup time scale we find is no longer discrepant with the time
scales found for the subpulse-drift slowdown and the emission decay around the
null.
