[sdiy] Stacking toroidal transformers

[Chris Strellis]

Hi Tony,

> I need to get a single transformer that does 15-0-15 and 0-5V
> supplies
> to replace one in a JP-8. Space is at a premium and nobody
> makes triple
> output transformers these days it seems at the currents I
> need. The UK
> bespoke transformer business seems to have collapsed.

http://www.plitron.com/Pages/Products/PC%20Mount/pcbmount.htm

Any good?

"they provide 5VDC and either ±12 or ±15VDC"

and 

http://www.clairtronic.com/5.htm

> Now I have worked out a way of getting two toroids in there using a
> metal mounting plate holding one above the other, but it
> would be a lot
> easier if I could stack one on top of the other with one big bolt.

It might work but I wouldn't be too happy about heating effects.  The shared bolt could cause a problem as it acts as a single turn winding?  I might be talking rubbish here though ;)

http://tortran.com/faq.asp

Says "You can mount our toroids next to each other or one above the other using spacers to prevent heat build-up, with no adverse affect."

Cheers

Chris