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In Reply to: RE: 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
Follow Ups:
when DC is present on the mains. DC on the mains will cause buzzing or humming noise from the transformers. Not as noticeable with smaller ones. In some cases, a slightly larger transformer with a slightly higher VA will sound better but not in all cases and it just depends on what is in the gear under upgrading.
I really wish Tweaker would put this crap to rest now. It's been talked about enough. If he wants to put a massive transformer in his gear, then by all means go ahead and be happy. No need to keep coming here every few weeks and stirring the pot!
Actually Cougie, you're the one who brought up the bigger is better thing under the recent thread on fuse sizing. I just thought I'd follow through on it since you seemed interested in my view on the subject. T456
And don't call me "Cougie" unless you want me to call you something back that you will not like. You may like being sarcastic as you have said yourself but I don't. So Let's not go there! This forum is to learn not to start debates just for debates. Everyone has their own opinion and you most certainly have yours, but everyone is tired of the "bigger is Better" debate now. Just move on and tweak your gear like you want.
You should listen to a lot of the people here that have a lot more experience than you and I. Learn from them as I have. I do have my own opinion/s but I still respect their advice. I have learned a lot from the members here and have taken some heat as well but I understand where they are coming from.
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