Hi!
Here is an image of a transformer I have:
I took it from an old diaprojector. The lamp that it was driving was 150w/24V halogen lamp (and that is also written on the diaprojector). The brightness with my semi-DIY-videoprojector-project is not good enough with this (the image is visible but I really would like to get a bit more brighness) so I am planning to try out 250w halogen (and I don't want to hear anymore "that will not be enough" -opinions, I am using original optics and other stuff from three panel projector from sony and it seems to be quite efficient in the means of taking use of all the light). I think it might be possible that this transformer is overspecified for the 150w/24v lamp so it might be able to drive the 250w lamp. The transformer is 9cm long (3,5") and the thicker wires are 1,3mm thick, the others about 0,5mm. It gives 25v with 235v with the 150w lamp.
Can some of you give a good kind of an expert opinion on this subject?
Regards
HB
Here is an image of a transformer I have:
An externally hosted image should be here but it was not working when we last tested it.
I took it from an old diaprojector. The lamp that it was driving was 150w/24V halogen lamp (and that is also written on the diaprojector). The brightness with my semi-DIY-videoprojector-project is not good enough with this (the image is visible but I really would like to get a bit more brighness) so I am planning to try out 250w halogen (and I don't want to hear anymore "that will not be enough" -opinions, I am using original optics and other stuff from three panel projector from sony and it seems to be quite efficient in the means of taking use of all the light). I think it might be possible that this transformer is overspecified for the 150w/24v lamp so it might be able to drive the 250w lamp. The transformer is 9cm long (3,5") and the thicker wires are 1,3mm thick, the others about 0,5mm. It gives 25v with 235v with the 150w lamp.
Can some of you give a good kind of an expert opinion on this subject?
Regards
HB
If I was an expert I wouldnt open myself to potential liabillity by telling you to go ahead a put double it's present load on that based on the info given. What have you found on the net regarding it's "past life"?
zardoz
zardoz
Well, I havent found about anything about it on the net. Manufacturer of the device that this was in is Kindermann and I have mailed them an inquire about the transformer. What I've found out about this stuff is that 1,3mm thick copper wire should be able to take about 13A, and it should be enough for 250W lamp, it takes about 10-12A... but this is for a straight wire... how much does the "coil shape" affect this?zardoz said:
Regards
HB
250W?
I wouldn't do it. While there is a chance that the transformer is slightly overspecified, it would not be almost 80% overspecified, that would have cost the OEM too much money for nothing. The wire diameter doesn't tell the whole story, there is also what the core can handle in terms of max flux. I would avoid disaster and shell out money for a proper 250W transformer if that is what you need.
My 2eurocents worth.
Jan Didden
I wouldn't do it. While there is a chance that the transformer is slightly overspecified, it would not be almost 80% overspecified, that would have cost the OEM too much money for nothing. The wire diameter doesn't tell the whole story, there is also what the core can handle in terms of max flux. I would avoid disaster and shell out money for a proper 250W transformer if that is what you need.
My 2eurocents worth.
Jan Didden
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