Back to basics. Transformers have turns ratios.
If you got a 20 ohm primary & 90 secondary it will
be 1/4.5 so you get apx 450V
give 450 V, nice for tube B+
The .3 winding gives gives 6V
This is rough due to losses, load, line, RMS vs P-P & other
minor variables but usable still.
73 Zeno
