It´s exactly the way as shown in the previous post from firepinto.
I don't understand "pie divided pancake style windings"??Phil,
I agree, for inner secondary and outer chokes I used pie divided pancake style windings. due to the concentric structure of the bobbins special care must be taken at the wire entry points because there the complete voltage difference occurs. so I think my next transformer will have entry and exit points for a winding at opposite sides.
I calculated windings space volume needed with a selfmade excel sheet. for winding efficiency I took 98%. that showed to be a much too optimistic point of view.
In the German version of Wikipedia I found an article about different winding techniques and the technique I used was called "wild winding" on the opposite of orthocyclic winding technique (http://de.wikipedia.org/wiki/Spulenwickeltechnik).
so I read and found out in practical terms that 73% winding efficiency for wild windings is more what can be expected.
It´s time for my next more elaborated VIC,