YAESU FR-DX-500

A friend has FL-DX-500/FR-DX-500, some time ago the capacitor in the grid
circuit short circuited at the ECL82/6BM8, and the valve draw excessive
current, the output transformer was damaged. Such components are now very
often very difficult to obtain, so I would suggest that you put some more
fuses in the receiver, at least one for the voltage to ECL82/6BM8, possibly
50mA. Some other fuses won't hurt, try to find some good places for them,
there may be some components you can remove to find places for small fuse
holders.
73 de Jan-Martin