e-licktronic Forum

Of course now that I've replaced the power supply the regulators get wayyy hotter than before!
Is this normal or I accidentaly short circuited something in the process?
I mean if the regulators really output about 1A or so with the heatsinks provided they must be getting extremely hot (too hot too touch).
Before the power supply change they were a lot cooler.
Do you remember how hot your regulators get?

edit: The machine seems to be working fine it's just that I'm sure the regulators didn't get so hot before.

What voltage go in the regulator ? Don't you use the heatsinks ?

Of course I use the heatsinks!
It's about 21.5 going in so about 6v voltage drop.
I don't think it's huge.
Need to measure the current consumption.
Is there a typical figure of current draw for a Nava w/extra9 ?

I'm using a very big toroidal as a test supply which supplies about 17vac which effectively gets converted to about 22Vdc. I should probably adjust my input DC voltage to be around 18V or so.
It's a linear supply so greatly inefficient if larger currents are involved.I should probably a transformer slightly larger than the one I was using (maybe 1500mA).
The toroidal I use seems to be barely loaded now and these extra volts contribute to the heat that needs to be dissipated from the regulators.

17v AC with or without load ? Here it's 15v AC under load and 17-18v AC without load.

Not sure about your statment.. if the transformer is inefficient it will just heat up itself, not make the regulator heat more.

Maybe with those transformers you need to take the good current target so the voltage drop under load becomes the good one.