Transformer repairs

[Tony Duell]

> 
> > After working on a SMPSU (or any power supply for that matter, but
> > especially a switcher), I usually power it up to test throught a
> > light-bulb.  [...]  Has saved me from "secondary catastrophic
> > failures" on more than one occation.
> 
> And I've heard people talk about banning incandescent bulbs entirely.


Indeed...

Whele I use compact fluorescent bulbs a lot, there are 4 places where I 
stick to the old filament lamps : 

1) Over my lathe. There is significant 50Hz flicker from compact 
fluorescents in my experience, I don't want the possible hazard of 
thinking something is stopped when in fact it's rotating at a multiple of 
the mains frequency

2) In my darkroom. CF's have a long afterglow when you turn them off, 
easily enough to fog film. I want a light source I can turn off instantly

3) In my copying stand, where I need a contimuous spectrum of light

4) In my SMPUS current limiter, for obvious electrical reasons.

> 
> Stupid ideas spring eternal....

As I have said sevral times, when I was a kid, 'green' meant 'naive'. I 
don't believe that's changed...

-tony