jem or junk?

I'm new to this group.

I have this old TV. Someone gave it to me about 8 years ago and it's been sitting in the cellar ever since. Is it a jem or is it junk?

It's a GE Black and White from the 50's-60's. It has a dark wood houseing and it is incredily heavy even though it's a table top model. The tag on the back says Model #830. From what I remember the guy said the pic-tube is good but doesnt recieve a signal. so......jem or junk?

Sorry for my naivety on this subject.

Paz