Re: ballasts


"G" <zekor@xxxxxxxxxxx> wrote in message
news:fcma73$fpq$1@xxxxxxxxxxxxxxxxxxxxxxxxxxxx
I have a system that worked. Had a lamp and a ballast. It quit
working. I replaced lamp and ballast, check everything except the voltage
between the ends of the tube. The filiments light. My question, its a two
lamp
ballast that has two unused wires. Having only one lamp connected, could
this
cause a reduced starting voltage across the lamp. I am suspecting
some weak link and not a hard core problem.

greg

Are you sure the ballast is wired right? Most North American twin lamp
autotransformer ballasts wire the lamps in series, the output of the
secondary is on the red and blue wires, the yellow wires are only a small
winding to provide cathode heat to the middle cathodes.


.

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