I found this schematic here: **broken link removed**
My question is, what happens if the output is accidentally shorted?
It appears that it would still try to put out 50ma, through the 56 ohm resistor. This would be a drop of 2.8V, leaving 169-2.8=166V across the LM317.
The maximum of the device is 37V, so I think it would likely turn into smoke, no?
And if so, are there other devices that would work, and have short circuit protection built in?
*also* - would the power dissipation be the voltage drop of the device * the current output? i.e. in the short circuit case, 166V*0.05=8w?