I've taken out a beafy transformer with 8 leads from PCB of a multimedia device of some sort. (Possibly a TV).
2 leads are obviously the primary coil (thicker leads and wires) the rest are almost same awg wire (and are connected to much thinner copper wires)
Is there a way to measure the turn ratios of these secondary coils vs the primary one accurately, without unwinding the coils?
I could use this transformer on some other projects if the TTRs are known.
Research and readings:
- Measuring the resistance of coils separately. [I don't think my DMM is accurate enough for such low ohm values. Plus, due to the unknown differences in copper gauges of different coils, I don't think resistance readings being useful.]
- Measuring inductance of coils. [Don't have LCR meter.]
- Applying alternating voltage (though it's not accurate, as it doesn't take into account the losses, and is frequency-dependant, any instructions on how to do it safely is welcomed)