bad precision pot?

[jorgen.bergfors at idg.se]

>So far I've never encountered any problems with cermet 10 turn trimmers.
<>But it is true that they are not made for many thousands of revolutions,
>the cermet film is said to suffer. They are made for ocasional trimming.

Well, the settability isn't always as good as you might expect. You often have to turn quite a bit befor anything happens. And if you turn too far and have to turn back, there is even more "dead" travel befor the setting changes. I'm not sure if the setting changes if you knock on them, but it could. Read Bob Pease's book and see what he thinks about multiturn trimmers...

/Jorgen