Power supply of oscilloscope d66 telequipment

[sfiga69]

I must replace the power supply of an oscilloscope d66 telequipment (main transformer KO)


Someone can advise to me like replacing the power supply of an oscilloscope d66 telequipment?

Original:

Transformer 55W with this secondary

1) 0 - 55 - 1700V
2) 0 - 480V
3) 16.5 - 0 - 16.5
4) 0 - 6.3V for crt heaters

Voltage required.
1)  8500V      (in original from 1700v with multiplier x 5)
2) -1250V      (in original from 480v  with multiplier x 3)
3)  110V       (in original from  55v)
4) +12.5V
5) -12.5V
5) +14V
6) -14V
7) -6.2V.

For point 4 -> 7 no problem. (7812,7912,7906, lm317, lm327, ecc....)
for point 3 transformer 24v with multiplier x 5.


the problem is for -1250v and 8500v why I do not find transformers step-up

If someone have a idea, suggestion .....

thanks in advance

[truebit]

If you can find an old dual wound transformer (one where the primary and secondary are on separate bobins) of about the right size. It is not to difficult to strip of the old secondary and rewind your own. Find the turns per volt by winding say 10 turns and measure the volts.