[RodB]

Hi Tiddat,

There won't be a hot chassis with a power transformer in the radio. You should replace capacitor 33 with a safety capacitor and leave everything the way it is. But if it makes you feel more comfortable using the polarized plug then do it the way you describe. I believe connecting LOC to gnd might reduce noise.

So, read up on the hot chassis situation. You'll find that it occurs in transformer less radios because the tube heaters are wired in series to the power cord and one end is either directly or indirectly connected to the chassis. In the days of nonpolarized plugs 115 volts might be on the chassis. For a shocking experience, pick up the radio and touch the chassis screw.