Replacing an unknown transformer

Thread Starter

paul.1911

Joined Mar 25, 2012
36
Hello everyone
I got a burned transformer from a small multimedia speakers...
I want to know its output voltage (want to replace)
It has 220v input and there are two wires out from secondary winding..
The only thing written on the top is KC3509030-2/B
If u can tell me what is the output? And how do u know?
 

Thread Starter

paul.1911

Joined Mar 25, 2012
36
I search for the already opened thread (as t&c says) but it was very old...so i thought why to open a new thread just for a one answer.
Anyway, I'll don't that again! :(
 

t06afre

Joined May 11, 2009
5,934
I search for the already opened thread (as t&c says) but it was very old...so i thought why to open a new thread just for a one answer.
Anyway, I'll don't that again! :(
It is correct that it is recommended to do a search in the forum. Before posting. Maybe your problem is solved already. However as you may understand. A thread will very quickly messy if several people are requesting help in the same thread, with a somewhat different approach.
For your question. A replacement transformer must have the correct voltage. And be able to source the current needed. Both are equally important.
 

strantor

Joined Oct 3, 2010
6,778
knowing the output of a transformer is not easy, especially if it is open. You may need to unwind it and count the turns on the primary and secondary.
 

t06afre

Joined May 11, 2009
5,934
It would be more easy to take a picture of the amplifier board. If we can identify the circuits(ICs) used. We may estimate waht kind of transformers specs that have been used. Both voltage and current needs
 

Thread Starter

paul.1911

Joined Mar 25, 2012
36
It would be more easy to take a picture of the amplifier board. If we can identify the circuits(ICs) used. We may estimate waht kind of transformers specs that have been used. Both voltage and current needs
I've tried a 6-0-6 transformer and the circuit is working on 6v, so i fitted but haven't checked the amps & volts. It was 1 month ago, my friends speaker and he is using it.
Actually that time I don't know lot more about transformers but few days ago I come to know about something from this forum.

And now I'm realizing that, I've fitted the transformer but haven't think about the overload. That circuit is may be powerful and it may be overloading the transformer and may getting hot.
Also I bought a amp circuit few days before for same kinda speakers, it was about 10W asking for 12v 1amp input...
So, i think, i should call him back and should check that.

So, before I call, I thought to know about the output of this transformer via its label (got from his speaker)
I open this thread, hoping may be some of you know how to read this code KC3509030-2/B coz i dont have wide knowledge about electronics.

So, if its not possible to tell then i'll try that way checking amps & volts.:)
 

absf

Joined Dec 29, 2010
1,968
Did you put a fuse on the primary side of the transformer? If yes, let's just keep our fingers crossed that the fuse would blow up first before the transformer coils get overheated. :D

Allen
 
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Thread Starter

paul.1911

Joined Mar 25, 2012
36
Did you put a fuse on the primary side of the transformer? If yes, let's just keep our fingers crossed that the fuse would blow up first before the transformer coils get overheated. :D

Allen
No there was no fuse and nor I've put.
 
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