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RE: Transformer Shorted? -Faintly lit up bulb without load.

Current through the primary will never be zero. Whether it's normal for the residual draw of a good transformer to faintly light a 40W bulb, I'm not sure. I don't normally do that sort of test. A metered variac (or a Q meter) would provide a more definitive answer. In the absence of those items, you could just plug it into a fused socket at full voltage. If a 1A fuse blows, it's bad.




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  • RE: Transformer Shorted? -Faintly lit up bulb without load. - Triode_Kingdom 14:43:14 02/23/15 (0)
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