New build with recycled parts on a ridiculous budget 120cm*60cm work area

[Davek0974]

Right wired up properly and tested 78.2v out so a little high what's the best way to reduce this voltage my AM882's 80v is max input.

If it were my supply i might unwind a couple of turns off the transformer secondary, but thats just me ;)

Not too many ways to fine tune the voltage really.

Maybe also look at an autotransformer in the primary circuit - a multi-tapped primary only transformer with the input going to the normal 240v tap and then take an output from the neutral and a tapping a little lower like 220v.

https://en.wikipedia.org/wiki/Autotransformer

Just an idea though. ;)