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In Reply to: Statement about bigger transformersTrue or False posted by Tweaker456 on October 18, 2016 at 13:12:23:
Let me say up front that this is just speculation. With capacitor input power supplies (most) current is passed through the transformer in short duration current pulses 120 times a second (100 in Europe). These current pulses will excite ringing the transformer if the secondary winding isn't properly snubbed (most aren't). This ringing can be seen on an oscilloscope and is perceived as noise. Will the larger core of a "bigger" transformer lessen this problem? Maybe - I'm not a transformer expert. If this is the case, and I'm not saying it is, rather than throwing a bigger transformer at the problem (and throwing away more money) a properly sized cap and resistor across the secondary will solve the ringing problem. Or use a choke input PS which draws current though the transformer more or less continuously.
"It is better to remain silent and thought a fool, then speak and remove all doubt." A. Lincoln
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Follow Ups
- RE: Statement about bigger transformersTrue or False - JKT 10/19/1620:47:53 10/19/16 (3)
- Also there are issues with bigger transformers.... - Cougar 21:44:54 10/19/16 (2)
- RE: Also there are issues with bigger transformers.... - Tweaker456 02:43:43 10/20/16 (1)
- And that was a while back.... - Cougar 19:27:39 10/20/16 (0)