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What transformer is this?

djQUAN

djQUAN

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Zeebit said:
The primary wasn't burnt. I inspected the visible windings and the insulation is intact as far as I can tell. I already replaced the thermal fuse and I have been using the speakers everyday since without problems.

I'll be happy if you can figure out the two traffos later.
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Were you able to figure out why the fuse was tripped? I've read that it is not recommended to reuse a trasnformer that had its thermal fuse tripped as the copper wire varnish may have melted or such but if it works without overheating then it should be fine. :)

I'll reply again later about the transformers as soon as I check them out later at home. ;)
 





Zeebit

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Well if the fuse gets blown again Im gonna scrap the traffo and get a new one.

BTW I just noticed that you are a Filipino. Kamusta pare? :beer:
 
djQUAN

djQUAN

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Zeebit said:
Well if the fuse gets blown again Im gonna scrap the traffo and get a new one.

BTW I just noticed that you are a Filipino. Kamusta pare? :beer:
Click to expand...

OK naman. :) nothing much to do at work. If you are nearby maybe we can do a meet up. I'd like to meet others with lasers too.
 
Zeebit

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I'm living in Negros Occidental. I know a member here named TomD. I think he is in Makati.
 
djQUAN

djQUAN

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I'm in Manila so you're a bit far from me. But if you do plan on visiting here, let me know ;)

sorry to go offtopic in your thread.
 
Zeebit

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You should check your welcome thread. I have a question for you there.

Now back on topic..
 
djQUAN

djQUAN

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I had a quick look of the transformers and it seems that your guess is as good as mine since I haven't seen one similar to those before.

I dismantled an old UPS before and applied 220VAC through a light bulb limiter to a suspected primary winding and then measuring the various taps and noting them on a piece of paper. What are the battery voltages on the UPS's?
 
Zeebit

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The battery is a 12V SLA. I will apply mains voltage on the suspected 220V side and try to measure the outputs.
 
djQUAN

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use a light bulb limiter incase you suspect wrong. That will limit the fireworks and prevent letting the magic smoke out. ;)
 

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Cyparagon

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I just measured one I had by using it "backwards." It's center-tapped 17.4V which makes sense because that's ~12.4V peak per tap and they operate by pulsing the 12V battery through one tap, then the other. Google modified sine.
 
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