Steinar,

try a Google picture search for "variometer" and you'll find many interesting 
links.

73
Johan SM6LKM

> I am now planing to make my own variometer, just for the fun of it. I am
> a novice you know , and I have to take the small steps to learn. I came
> across this page describing in easy terms how to make a variometer,
> http://www.giangrandi.ch/electronics/shortanttuner/shortanttuner.shtml .
> It seems not be too difficult :)