today we replaced the 2W07-1 PMT and the HV base because from last week it
was very bright.
Furthermore we also found out the opposite side was under gain (~2.5mV).
For these reasons we rose the corresponding 2W07-0 operating voltage from
-1490V to -1560V and we set the gain to the other side, that's Ok at -1380V.
A presto,
Massimo