For awhile, I have worked on a linear power supply design, and I think I have a circuit which is pretty stable with 47uF output capacitance, capable of 100mV to 15V and at least 5A (or more) on a single rail supply, and I can of course also mirror the circuit to generate a negative voltage rail fairly easily. However, to ensure my supply can regulate power efficiently without dissipating too much power (say 50W max TDP) I need a good few voltage tabs, maybe about 5V increments. -20V, -15V, -10V, -5V, 0V, 5V, 10V, 15V, 20V. (unless I do some sort of voodoo with the rectification and inverting voltages, IDK. Ideas?) I added my design for something that generates voltages between -25V and 25V with only 5 tabs, but due to half-wave rectification, I do not think this design will be suitable. Drawing even 5A from the +25V rail causes current spikes reaching 90A and beyond. Of course series parasitic inductance and resistance would greatly reduce that, but I don't like the looks of it. I checked sources like Mouser, and Ebay but it appears that transformers with such a number of taps are uncommon to say the least. Where could I source such a transformer?