On Wed, 13 Aug 2003, Peter L. Peres wrote: > > electrodes in operation. The problem is common to all mercury vapor > lamps > > (including common fluorescent tubes). > > > Veeeeeeeeery interesting, Peter! I'll look for some datasheets and learn > > more. Thanks a lot! ;o) > > Is it that veeeeeeery interesting ? I forgot to mention that the dc from > the lamp also affects the oscillator and can put the transformer into > saturation and 'cook' it. > Maybe I will dissapoint you, but is not. :) Use a scope with a 100:1 probe and see the amount of DC voltage compared with the ac output voltage. Vasile -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu