Ran a few tests this morning.
inn refers to the windiing on the inner pipe
out refers to the winding on the outer pipe
separately means the outer pipe winding connected to one ac terminal of the bridge and the inner pipe winding connected to the other ac terminal of the bridge.
combined means both inner and outer pipe windings connected to the same ac terminal of the bridge rectifier.
earth on red/black is means the earth wire connected to the pos or neg terminal of the bridge rectifier capacitor.
The voltage in is AC volts from the variac.
volts out is the DC voltage across the capacitor on the output of the bridge rectifier.
It seems like after a certain voltage the output doesnt increase I may try winding more length on inner then on outer
By the way how do I show the results in this window without having them as an attachment