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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?

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.
like four million tons of hydrogen exploding on the sun
like the whisper of the termites building castles in the dust

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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Location: Scottish Borders
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.
regards Andrew T.
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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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