4400 turns can give pretty high winding capacitance...
better to put it into some sections...two is enuff
sectionizing is not only leakage inductance/capacitance
mathematics, it is sound of trafo on highs;
but for most applications no need more than 7 sections
thick paper is enough for insulation, mylar better;
Don't forget copper foil shield beetween p-s
)
very nice if you can found 0.03 mm thick,
farnell have 0.08mm copper foil...
Order Code: 751522
Insulation beetween windings plays role-nice to have completely balanced trafo...put less insulation beetween inner layer and copper foil than same or bit more beetween copper foil and next winding (equal capacitance-cmrr, ringing, distortion,phase....)and so on...
measure carefully capacitance beetween screen and winding,
before connecting screens together, record results, ~10 trafos and you're in
))
If you use nickel lams, do not stack them very tough-it causes to trafo
to distort bit more and sound becomes less juicy;
use best electric wax you can find to impregnate trafo,
put trafo into bath with hot wax for 10-15 minutes,
then let it cool SLOOOOW....
for some audiofulish reasons laquer sounds not so good
Of course, never magnetize lams, and demagnetize trafo before measuring for sure(search this forum for demagnetize)
Best strategy is: wind-measure-listen,
equal loudness test
and compare, compare, compare with good trafos.
10% here is theory, 90% is practic.
