bad precision pot?

[Martin Czech]

:::I've used the horizontal mounting type more often, for vco scaling on some
:::3340 oscs. They haven't needed any adjusting for a couple of years. They do
:::take up a fair bit of board space.
:::

And they might be difficult to turn if the pcb is mounted.  I mean
later on service, if all is mounted.  I have made some "wonderfull"
experimental boards which are now absolutely impossible to trim after
the board is inside the plastic box.

(This depends on the situation, of course.  I take the vertical type in
most of the cases.)

As it was experimental I could drill little holes in the box without
too much grief. But I wouldn't like that to happen in a real module.

There are mounting kits where these horizontal types can be mounted on
the panel, for trims that have to be adjusted every 20 sessions or so
(drift etc.).  I know a lot of Tektronix gear with the same feature.

m.c.