DIY Mic Pre Kits, Lunchbox Mic Preamp Kits, Power Supply Kits

So I built my new power supply into a nice bench supply! It works great and I managed to fit it into a 5 x 4 x 3 box with room to spare. I let it run for a few hours at various voltages and the heatsinks barely get warm even at 9v with a 22-0-22 trafo. I get about 1v to 31v on the +/- outputs and 20v to 51v on the 48v output.


Now my question is, if I want to convert the 48v output to be a 1v to 24v like my other positive input, what do I need to change? The lowest the 48v output goes is about 20v and it would probably be more useful to me if it could do 5v or 12v.

The heatsinks will get warm when there's some load connected to it. If the load is light, then the heatsinks might not even break a sweat.



The regulator has a maximum output/input differential of 40V. Basically, you *must* not exceed this, otherwise, the regulator just would not regulate.

So if input voltage is 60V, and output is 48V, that's a difference of 12V. So thats good.

So 20V is the minimum output voltage you can have for the 317T with an applied input of 60V without exceeding the 40V differential.



Well, what you can do is hang a simple 7805 or 7812 regulator on the output of the 48V line... that will give you 5V and 12V fixed outputs.

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Ok cool I will try that! Thanks for the great info as always!