"CW" no adddress@spam free.com wrote in message
...
Appears to be an adjustable spark gap. The two metal fins, one connected
to
each horizontally opposed points, are the inputs. The third point would be
connected to ground.


Yes, I think that it's a spark tester for small engines but then someone
questioned this and said they thought it was used with radios. Do you think
it's for radios, small engines, or both?


Rob