Width & Focus in DuMont RA-103

[jeyurkon]

Originally Posted by jr_tech

So shouldn't a 12LP4 gun (slashed field ion trap) really have a two pole magnet?

jr

Yes, but I have two sets that came with only single field traps with their 12LP4. One adjustable single field magnet I have came with instructions saying that it could be used in place of a double field, but that it wouldn't work as well.

I'm not sure if the sets I have were that way originally or if someone replaced them.

John