Tom,

how does one know if it is of a 'hybrid' type? Is it in the datasheet?

Thks

"K7ITM" wrote in message
oups.com...
Small cermet pots should be no trouble at 50MHz, assuming you aren't
going to extreme resistance values. You will always have parasitic
inductance and capacitance, but if a carbon pot would work in your
application, a cermet of the same size and general design should behave
similarly.

Beware of the conductive plastic ones...some of those are "hybrid" pots
that have a wirewound element under the plastic, to get very good
linearity, and the conductive plastic provides interpolation between
the turns of wire. I once used one of those to read out an angle, and
it worked great, but I wouldn't consider trying to use it at RF. If
it's not a hybrid (no wirewound element under the plastic), it should
be OK.

You may also want to consider the amount of (RF?) current in the wiper.
It's generally a good idea to keep the wiper current low, unless the
pot is specifically designed for high wiper current.

Cheers,
Tom