I agree that measurement is needed but i have dismantled it ,unwind it, now i am to rewind it.
Now before rewinding it that is the data i had :
1-winding (7,8) has 32 turns,winding (1,3) has 4 turns ,winding (2,4) 4 turns and winding (5,6) 6 turns (known by dismantling ).
2-the supply 308v (220*1.4) applied to pin 8 of winding 7,8 as there is a mains bridge rectifier followed by 22UF 400v ,capacitor partially shown in the schematic .
That was the original circuit data.
Now i have made a simple driver circuit (555 followed by a power transistor 2sd401). The new circuit will have a supply of 12v and i am going to rewind the trasnsformer.
Am i to wind 32 turns for the secondary and 32*12/300= 1.3 turn for the primary?
or 4 turns primary and 4*300/12 =100 turn for secondary,the problem is that the original circuit has feedback as winding7,8 and 1,3 have a ratio of 32/4=8 and the amplitude of the signal is controlled by this feedback.
To make it short !!! if i am to do measurement i have to rewind the transformer ,better for the new application(12 to 300v),assuming almost 12 v squarewave input (neglecting VCEsat ).what number of turns should i use to do the measurement?