bigger transformer in BOZ

[boergars]

Hello
Im a newbie at this forum and this is my first question:

I am building a BOZ with the PASS PCB.
I have got a 2X33V transformer leftover from another project.
What changes shall i make to use it in the BOZ?


Boergars

[joensd]

As your rails will be a bit higher than in the article the power dissipation of Q1 will also be slightly bigger.
Cause the voltage might be near 95V you have to watch C1 and it´s voltage rating but that should still be OK.

You can also get the rails down a bit by putting a resistor in line with the +-terminal of the rectifier (after C1). A value of 50-100Ohm and a 2W rating should be OK.
It´ll get the rails down about 4-8V (50-100Ohm).
If you now put another cap after your added resistor you´ll have some additional RC-filtering which should be very fine.

[boergars]

Thanx a lot