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I am trying to replace a blown transformer, but I haven't a clue as to where to search for or order such a specific specification part.
The broken transformer had an input of 120V 60Hz, with an output of 14.5V and 8.5V at 15W. It runs a 12v bulb, so I don't understand why the higher luminance setting is so high, I'm not an EE (yet ;-) so perhaps I am missing something- but I am left to assume that a 12v transformer would suffice. The dual voltages are not so much important as are the wattage for me, since this is an internal part of a lamp and there wouldn't be much room for a larger rated transformer and a smaller one obviously wouldn't deliver sufficient current.
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You can try online at www.mouser.com or www.digikey.com. Or maybe your local radio shack will have what you need.
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The odds of finding a transformer that will physically fit the existing space is quite small. I would recommend a wall wart of 9 to 12 volts of sufficient current rating. Maybe from a printer.
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I'd say mouser electronics. If you just need one part, ask for a sample pack, I have gotten so many part for free. I told the lady on the phone I needed a specific dallas clock chip and she said she would send out a sample. A few days later I received 8 of em. Same with transistors I have ordered and MCU's
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Wow, what an abundance of responses! I sent out an email to several of the sales reps from the sites you guys listed.
If all else fails, you are probably right wizard fred, I may just consider buying a printer supply off ebay. It'd just be nice to not have to deal with one in a plastic enclosure, since this is a chassis mount I am replacing.
Athlon XP 3200 Barton Core
Geforce 6800GT O/C
1GB PC3200
Windows XP Professional SP2
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Shube - you state the failed transformer has two outputs, 14.5v and 8.5v at 15watt.
If I understand correctly, you then say you are looking for a replacement with just one output of 12v.
Are you sure this will work?
Before committing to purchase this type of transformer (do not forget scrappers or kerbside), you can test this with a car/motorcycle battery/charger/cigarette socket or similar.
What did each of the original outputs feed?
Good Luck - Keep us posted.
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I've had a few responses from the companies I e-mailed. Some only had PCB mount transformers, and I need a chassis mount. Others do have the 12V transformers, so I may buy one. Jameco has not provided me an answer yet, but they told me they got my email and will right back soon. One of the companies offered to custom design me a transformer with those exact outputs! They wouldn't give me a quote on it though unless I was more specific with my needs, but I imagine it would far outweigh the value of the lamp!
The reason why I haven't tried testing with an alternative 12V source is because I am replacing the transformer inside a lamp that uses 12V light bulbs- specifically it uses a common car taillight bulb.
The only reason I am holding out on going for the 12V only is because the lamp has a SPDT switch for a high and low setting. If I get just the 12V I'll be stuck with a high setting only. Not TOO BIG a deal.
I am still sort of confused though why the transformer would use 14.5v on a 12v lightbulb, does this make sense to anyone?
Athlon XP 3200 Barton Core
Geforce 6800GT O/C
1GB PC3200
Windows XP Professional SP2
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The 14.5 may not be true RMS and/or it may be an open circuit voltage measurement without a load attached.
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