LM317T Voltage Regulator with Pass Transistor

I apologise in advance for the shaky video during engine starting. I simply didn't have enough hands! This is the initial test of a boost circuit I made to assist with getting an initial field on my ST-10 generator with its output powered voltage regulator. The 9 volt battery is used to "kick start" the field in the event that self excitation is insufficient. Some ST-10 generators (including mine) do not retain enough residual magnetism to start generating when using an output based voltage regulator such as the GAVR-15. This circuit appears to have completely overcome that problem.



http://www.youtube.com/watch?v=TDudye9XEtw&hl=en