I will check, but I remember a lot of transformers where the coil inside was fairly large relative to the can. Certainly not half the radius. Also, isn't that how most tesla coils are proportioned? A few turns at a large distance from the secondary? I know they are looking for loose coupling. I've just been wondering about this, and googling around has not turned up anything. I've also seen coils mounted very close to shield cans and bulkheads. I'm wondering because I was considering a design that would have a high voltage transformer mounted axially in an aluminum case. I thought the aluminum would be a shorted turn. On Wed, Aug 26, 2015 at 10:38 AM, wrote: > > > > This has been puzzling me. Why does the shield can not act as a shorte= d > > turn? > > It is far enough away from the inductor that it is so loosely coupled it > isn't seen as a shorted turn. > > IIRC the can needs to be twice the coil diameter for this to be the case, > or the coil needs to be shielded (i.e. in a ferrite cup or similar that i= s > part of the magnetic loop). > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .