How do I wire up this transformer for 110V mains? - diyAudio
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Old 10th May 2010, 11:11 PM   #1
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Default How do I wire up this transformer for 110V mains?

http://www.apexjr.com/images/66938_sc7.pdf

What are the third wires for on the primaries?
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Old 10th May 2010, 11:43 PM   #2
infinia is offline infinia  United States
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I think they are just extra connectors (leave them open by insulating them) they are the same color code.
parallel 120V PRI windings ( dots to dots) or BLK to BRN and WHT to BLU etc

If your 110 is really 120 > No load voltages s/b close to 43 VDC
Boderline HV >>> PS let use know if your chip amp does OK with your mains measured.
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Last edited by infinia; 10th May 2010 at 11:51 PM.
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Old 11th May 2010, 11:00 AM   #3
AndrewT is offline AndrewT  Scotland
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Hi,
use a mains light bulb tester to power up each time you change or add something to a mains powered project.

A wrong wiring of the two primaries can quickly burn out a perfectly good transformer if the fuse does not blow quickly enough.
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Old 11th May 2010, 02:58 PM   #4
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Last edited by 454Casull; 11th May 2010 at 03:01 PM.
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