I'm a student pilot. I'm learning in my son's 1973 150L. Last week on a cross country, the CDI wasn't moving. The To/From bar would go up and down a little, but the needle didn't move.
I'll have to check with my son to see what nav/com is in the plane currently.
Once I'm certificated (is that a word?), I'm going to be part owner of the 150L - Loosy Sue.