Thank you very much for the reply. Unfortunately I cannot find such markings on the ballast. There are some VERY faint markings which I can't read even with a magnifying glass - but from what you said (and with meter readings) I assume that only one wire goes in and one wire comes out. I will...
I have a BIAX G23 base mini fluorescent tube and a Vosloh Schwabe 11 watt ballast but have no idea how to connect the two. I need to know where the mains wires go into the ballast and where the wires to the lamp base come out.
All help will be appreciated.