I have an old aircraft radio made by Fram Air Co. model no C-3-12 is there any info on this piece of equipment?

A little googling turns up nothing---you might also try a forum dealing with airplanes.

If you provide pictures and tell us about the tubes / transistors, we might be able to narrow it down.

Geez, I have a Fram air filter in my car! Could it be the same company? Something tells me it's not, but you never know!