[sdiy] what makes a transformer vibrate?

[Peter Grenader]

Among other things, ABBA music -  they HATE that.

Another cause is running them with different power configurations than the
circuit was designed for.  For instance, a 60 hZ line as opposed to a Euro
or Aussie config.  We had a lot of problems with this in our subwoofers when
I worked at M&K.

- P

Nils Pipenbrinck wrote:

> Is this a problem, and how to get rid of it?
> 
> I have a old Nordmende transistor radio from the 60th in my kitchen.
> Don't use it much, but yesterday evening I noticed how loud the little
> power transformer vibrates. It's the original external mains adapter,
> and I don't want to replace it. (it's just a 220V to 12V transformer, a
> fuse and 4 rectifier diodes, but the housing and inner life are still
> original and look very funky).
> 
> Nils
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