Hi there

I need to build a dual +/- bench top supply.
Can someone tell me, where I can find a schematic for a bench top PSU linear and variable both voltage and current.
There are lots of smaller ones, but the effect is to small for my needs and I can not modified it my self. It would be nice if there is a pcb layout.
The 60v should be the ac/dc input, because that is what my transformer outputs after rectification.

I do have an old danish design, a NT300 based on LM723/2N3055 which I used to modified for more current. But I cannot modified the voltage, because the 723 only goes to 40volt. I do have the schematic, so maybe there is someone out there that can make the modification? Is there a direct replacement for a LM723 that can handle 60 volt?

Thanx in advance
Claus

 

You could possibly use an LM723 as in the datasheet - Figure 22. Positive Floating Regulator gives a schematic for a 50V supply.