Thanks for the quick replies! I am using two ferrite EE cores, dimensions 60x35x8mm size each. The input to the primary is the current-amplified output of a darlington pair (SL-100 and 2N3055)
What should be the maximum and minimum primary voltage of output transformer with 10 turns of 22 SWG primary winding and 500 turns of 34 SWG Secondary winding?