PP88Key -Your Stoddart NM-20A, even if it were operational, could cost a lot of money to properly calibrate and more money to keep in calibration. There are some military radio collectors that like that kind of equipment. From the pictures, it looks like a fine piece of 1950s high tech tube type battery powered radio. There are maintenance manuals still available but some of the repair parts might not be available. Unless you have a lot of spare money, I'd pass on getting that repaired by someone. A Field Intensity Meter probably is not a very good DX receiver as it does not have an AGC and some of the other things that make for a great DX machine.