ELECTRONIC BALLAST?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Ed Phillips" <evp-at-pacbell-dot-net> 

Anyone have a clue as to the circuit of the ballast/power supplies for
screw-in  fluorescent lamps?  Just cut a dead one apart and found more
stuff than I expected.  Six diodes, 2 HV transistors, one diac, one PTC
resistor, two inductors (one closed ferrite core with fairly heavy
wire), two 22 ufd, 200V electrolytics and miscellaneous other resistors
and capacitors.  A lot more stuff than I expected and that probably
explains the RF interference they generate.

Ed