Schottky barrier rectifier and LM317

[boylesg]

Would passing the supply through one of these before it enters the input pin of the LM317 effect the performance of the LM317 in any way?

I have implemented my high current adjustable voltage reg with a protective diode on the input but it appears that it is causing the voltage from the reg to waver a bit around my target voltage.

Shorting the diode appears to improve matters.

I was trying to test this with alligator clip across the blobs of solder on the back - electrical contact may not have been ideal with this however.

 

[FvM]

No problems expectable if the required bypass capacitor is placed at the regulator input.

 

[pplus]

What is the voltage drop across LM317 in both cases?

 

[boylesg]

What is the voltage drop across LM317 in both cases?

Sorry it was a false alarm. I forgot that you must to have a minimum load on the output for it to regulate the voltage accurately and I had neglected to add such a load. Once I did the voltage output was steady although I did have to rectify a couple of soldering muck ups first.