Has anyone heard of a Pilotuner Frquency Modulator? I think it has something to do with Ham Radios but I don't really know. A friend of mine gave it to me and I wanted to know something about it. It is old and in a wooden case. I was thinking about restoring it.

Frequency Modulation is FM as in Radio, Does this help or look like it?:

http://www.pilotuner.com/

Yes I understand what you are saying about FM. This seems to be an adapter of some sort that is in a wooden box from the 30's or 40's. I'm not sure how common FM radios were in this time frame. I think it adapts to something for frequency adjustment ham radio maybe.

Did you click on the link and look at the picture?

Sorry Stratmando I didn't click on the link until you reminded me, must be old age. But that is exactly what I have the small one. Thanks a million.