[Chas]

   

My opinion is that no circuit modification is necessary to make this radio safe or "safer" than what it already is without introducing a certain amount of external risk.

Both the antenna and ground connections to the terminal strip are isolated with .01's. These can be replaced with the "X" 0.01mf cap at 400/600 volt. We know these fail open, safe.

There is at least one AC line to chassis cap, again the X does the job.

Though I have used the schematic provided, snipped and converted, look carefully at the power plug, it appears to me that one "blade" (lower) of that plug has a wider line width indicating a polarized plug. Reviewing the schematic and accepting the concept the wide blade exists, it appears that that line is the neutral line connection and takes an appropriate path. The bulk of the schematic can be reviewed in a previous post...

I would check the antenna input coils and the band switch for proper operation.

Chas