Jon Wilder
Active Member
If this was occuring at 12V then more than likely you have a 24VAC CT @ 1.5A and your full winding current is actually 1.5A. In other words, if you ran it at 24V with a bridge rectifier across the full winding you would only have 1.5A available, while having 3A available in the 12V Full Wave Grounded Center Tap config.
Now if you run it with a bridge rectifier across each 1/2 of the winding you would have 12V @ 0.75A on both because each 1/2 of the winding is now being drawn from CONTINUOUSLY rather than having a 50% duty cycle like they do in Full Wave Grounded Center Tap config.
As to why it states 3A on the transformer itself, more than likely they spec'ed the available current at 12V. Seeing as how they also spec'ed it as a 12V-0V-12V rather than a 24VCT this would make sense.
Now if you run it with a bridge rectifier across each 1/2 of the winding you would have 12V @ 0.75A on both because each 1/2 of the winding is now being drawn from CONTINUOUSLY rather than having a 50% duty cycle like they do in Full Wave Grounded Center Tap config.
As to why it states 3A on the transformer itself, more than likely they spec'ed the available current at 12V. Seeing as how they also spec'ed it as a 12V-0V-12V rather than a 24VCT this would make sense.
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