Hello addys
try high watage resistor or make one with resistance wire...
My motor is a dc motor was rated 90v 5 amps 1700rpm if i feed it with 12volts only 0,5 amps flow... I than added some resistors and thin wire coils i had here all in parallel with a high watage variable resistor i think its 2w 1kohm those from vishays with 10 turns wire wound... it do get hot and seem that it was kind of damaged when turning it but i can adjust nicely the torque of the motor... I didn't measured the resistance, i just tried an it worked nice with the values i got here... I don't let it turn too fast, just enough to force the wire to keep well fixed, and i don't get bored...
In the future i will make it controlled from transistors and with easy reverse direction button, speed... instead of changing the wires polarity, resistance...
Hope i don't need to do this modification if the thing works...

i just took a measure my chokes has around 4,5henries with the CC core... around 1000 turns
so the secondary should have around 18H