12v regulator outputting 10v

[Bton-FM]

Hi everyone hope you are well.
I've been wiring a couple of my satcans recently and it was a sweet as a nut but then my 12v regulators on 2 different cans I noticed were outputting 10v .Does anyone know why this is?I soldered the tabs to the can.I think maybe I overheated it when soldering.My soldering iron temp is 330 degrees C.When I turn on the power supply I get about 10.7 on the otherside of the regulator then it slowly drops.

[teckniqs]

What voltage do you have going in? ....you should need around 14v input to get 12v out and anything less than that could result in a lower voltage coming out.

[Bton-FM]

Don’t worry I realised what my mistake was

I had 13.8v going it to it which is fine in worked perfectly on the other satcans I was wiring where is didn’t make this stupid mistake.