http://auto.howstuffworks.com/ignition-system4.htm
The condenser stops the points from burning out. Check out the link , hope it helps. I had a Fiat years ago that would not start. I changed every part of the distributor and finally figured out that someone had filed too much off the points and the resistance they are supposed to have had been lost. New points and away it went. Not sure whether yours are new or what.
Cheers
Al.