I came across an old E-I 25v 3A transformer, small, which i beleive would be perfect for my preamp. The thing is it outputs 30VAC (give or take, measured with my multimeter) with no load at all, but when i connect it to a bridge rectifier it outputs 24VDC *and* about 12vAC on the output terminals. This happens both with a discrete bridge and a regular 30A one, so i beleive it's the trafo... but it's puzzling me. Any ideas what could be wrong here?
If you don't have any smoothing caps you will get DC AND AC! Varying DC voltage is in fact AC.
Nothing is wrong, just add smoothing caps!
Nothing is wrong, just add smoothing caps!
Thanks 🙂 (feeling less dumb already)
BTW is that normal? I mean, 12vac it's almost 40% of the output. I have hooked bridges to transformers with no smoothing caps in the past and never had this kind of situations...
BTW is that normal? I mean, 12vac it's almost 40% of the output. I have hooked bridges to transformers with no smoothing caps in the past and never had this kind of situations...
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