[rimljan99]

I will soon start on the chasis for AKSA 100N and I got one question: Which is the minimum lenght between shielded toroid transformer and AKSA main board?

In my case is 40 mm between toroid and 7.5 A fuse on the main board. Is it enough, or should I change my chassis plan?

[AKSA]

Hi Rimljan99,

40mm is fine.  As long as your earthing is correct, there will be no hum at all.

Cheers,

Hugh

[ginger]

For queries like this you can learn a lot by having a look at what others have done.
Checkout,
http://www.printedelectronics.com/discussion/discussion_gallery.html
See my 100W (Ian Miller - about the 8th one from the top). I had about 25mm separtion on this amp. That amp since sold to a happy AKSAphile and replaced with a 55N+.
A few amps in the gallery on that web page and lots more in the forum gallery (at the top of page 1 of the forum) with less than 40mm separating transformer and main board.
CAUTION: If using EI cored transformers rather than toroids then I would leave 40mm minimum separation.
Cheers,
Ginger.