Hey, popi, too much mathematics for an audio forum. I´m become crazy, ja ja ja!
Hey, popi, too much mathematics for an audio forum. I´m become crazy, ja ja ja!
Not sure you need the higher temp Nomex for an IT transformer. Ought not be much heat at that power level? Kapton would seem to be sufficient?
As a humble advice, try to make a standard winding, with say, 3 P and 3 S,
It is better if you do 3P's and 4S's where you start and end with a S. The first and last S's will have half turns compared to the inner sections. In this way the f.e.m. will be preserved. Otherwise the f.e.m. will be distorted to some degree. This happens because the inner S section "sees" two P's instead an outer S section will only "see" one P (on one side only).
Of course you can do 4P's and 3S's if this comes better in a practical winding condition.
Hmmm.
How well would plumbers tape work? It is PTFE, and is available in various widths.
I think the purpose of the tape is more for reduction of inter-layer capacitance than as a dielectric.
Since I'm considering bi-filar winding, it probably matters very little other than providing mechanical insulation to prevent overlapping windings from creating pressure points that could result in breakdown and shorting of turns.
.I think for one you really need to relax your specs. Why 5xRp? 10Hz as low end goal is admireable, but is there really that much to gain in happiness? Better to aim for 20 or even 30Hz and get better wide band response IMHO.
Anyway, hope you give it a try. I've just bought some left over amorphous cores for same idea, interstage trannies, but will use lower Rp tubes like 6922 and trioded 6W6s. I think you core size is plenty for this useage. As you know you need some air gap since it'll be SE, and that'll require even more turns to make the Henrys. Good luck.
Oh, what size wire are you using?
poplin, winding in the same direction is what I suspected as q=CV^2.
if all turns were wound in the same directions, the voltage difference between windings in one layer over the next remains constant across the layer.
When wound l-r then r-l, the winding at the right end of the first layer is at the same voltage (V) as the the first winding in the second layer. However, the first winding in the second layer is at 2V referenced to the first winding in the first layer.