Morning Gary
I am assuming that this is a “ALL AMERICAN FIVE’ Radio. And I am also asuming that the tube you replaced was a 35W4. You also say you replaced the burnt out Panel light. If that panel light went out first, that is most likely the reason the tube was also lost. And if your new LED light is not drawing enough current, you will surely lose the second 35W4 in short order. Using this LED could be a recipie for further disaster!! So the correct rule of thumb, on these radios is to never use the radio if the panel light does not work, or does not draw enough current!!
Much has been written about the filament problems related to this 35W4 Tube.
Regards
Ralph
