gEDA-user: ngspice and parts

[David Logan <djlogan2@xxxxxxxxxxx>]

Good morning.

Is there a particular site, or a list of sites, available for 
downloading spice parts? I found a bunch of diodes and a bunch of 
transistors. But I still haven't found any that I'm actually *using*, 
just some that are relatively comparable.

Other than looking for spice files for parts that I really am using, I 
am currently looking for an LM317, which wasn't included in the ngspice 
install, even though a gschem symbol exists. Is that going to be true 
for all gschem symbols? The symbol will exist, but I will have to hunt 
down a spice file?

I presume that in many cases (if not in most cases), it's impractical to 
write your own spice file due to the difficulty of measuring all of the 
interesting values that go into it (especially in the case of diodes...I 
expect other parts have similar difficulties.) The data sheets don't 
even come close to containing all of the values that go into a spice 
file (at least in the case of diodes.)

So finding spice files written by electronics manufacturers, or major 
electronics companies is the way to go?

Thank you,
David Logan