> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]On Behalf
> Of Brent Brown
> Sent: 30 November 2006 01:43
> To: Microcontroller discussion list - Public.
> Subject: Re: [EE] 115V 50Hz and hot transformer
> 
> 
> I have now tested one of these transformers in the alternate 
> configuration of 230V 
> 50Hz (2 x 115V primary windings in series).
> 
> It seems to be getting just as hot... approx 60 deg C (140 deg 
> F), no load, after a 
> couple of hours or so on the bench. Previous measurement of 80 
> deg C was with 
> the transformer in a sealed plastic box (finnished product). 
> Tends to discount the 
> theory of miss-matched windings in parallel. Also not a single 
> transformer problem - 
> tried 5 or 6 so far.
what brand is the transfomer? 

is the transformer meant to be heatsunk?


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