u/EdoardoIU5VKS

Hi everyone, I'm building a 12-15V 20A linear power supply.

I tried using a 300VA toroidal transformer as a transformer, which outputs 14.4V at no-load. However, when it's under load, the voltage on the secondary winding drops dramatically, even below 12V, to about 10.5V. Is this normal? I knew transformers had a voltage drop under load, but I've usually read that it's about 10-15% below the no-load voltage. Should I replace the transformer?