Thanks for the info john, I’ve got a few TT's laying about that I had planned to use as a bench supply for testing bits and bob's.

What I would really like, is something that would allow me to turn a knob and change the voltage output to different amounts.

As and when I need to for supplying and testing different things, can you please recommended what it is I should use, what kind of "knob" I need to be looking at.

Panel mount voltage regulator?, I would more than likely use a little digital screen of sorts so I can fine tune the “knob” to just the right volt output each time.

Thanks guys !