P
Pawel Paron
- Jan 1, 1970
- 0
Hi,
I'm investigating options to replace a damaged ballast in an LCD projector.
There is a 120W UHP bulb in this projector, as I found its operating voltage
is about 75V (some source claims 65V). I would like to connect an external
MH coil ballast and ignitor, but I'm confused what the rated power of this
ballast should be. I don't remember exact numbers, but seems, that a general
purpose MH lamps in the range of 75-150W have somewhat higher operating
voltages, 90-100V or so. Considering that, what would be a general rule,
should I look for a higher or lower rated MH coil ballast, or as close as
possible to the original 120W? There isn't much choice, like 75W, 100W and
150W, which one would fit best? I would prefer to underpower than overpower
that UHP bulb.
Thanks in advance for any help
Pawel
I'm investigating options to replace a damaged ballast in an LCD projector.
There is a 120W UHP bulb in this projector, as I found its operating voltage
is about 75V (some source claims 65V). I would like to connect an external
MH coil ballast and ignitor, but I'm confused what the rated power of this
ballast should be. I don't remember exact numbers, but seems, that a general
purpose MH lamps in the range of 75-150W have somewhat higher operating
voltages, 90-100V or so. Considering that, what would be a general rule,
should I look for a higher or lower rated MH coil ballast, or as close as
possible to the original 120W? There isn't much choice, like 75W, 100W and
150W, which one would fit best? I would prefer to underpower than overpower
that UHP bulb.
Thanks in advance for any help
Pawel