Maker Pro
Maker Pro

Wiring a block transformer

Hi All,
I'm new to this game and looking for a bit of advice.
I'm building a blue tooth loudspeaker for my shed and had ordered a typical frame type three wire output transformer to power the pre-amp section of the speaker. However I was sent a block transformer which I was told would do the job but it has a four wire output marked 12v ; 0v and 12v ; 0v.
The pre-amp has input for 12v ; 0v ; 12v. I'm unsure what to do.
Can anyone point me in the right direction?
 
Appears to have dual secondary windings, they would be paralleled if just needing one 12v source.
They should be indicated as to the connecting polarity, normally by a Dot on the DWG or marked as 0 & 12 on the transformer.
Ensure the 0's go together and the 12's go together.
If not sure, there is a guaranteed method using a meter. I can post it if you need it.
 
Appears to have dual secondary windings, they would be paralleled if just needing one 12v source.
They should be indicated as to the connecting polarity, normally by a Dot on the DWG or marked as 0 & 12 on the transformer.
Ensure the 0's go together and the 12's go together.
If not sure, there is a guaranteed method using a meter. I can post it if you need it.
Thanks for the reply Minder, the pins are clearly marked on the transformer so no issue there. If I wire the transformer in parallel as you suggest this would give me a two wire output 12v 0v, but the preamp is looking for 12v 0v 12v. I must be missing something basic?
 
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