[MrFixr55]

For these Zenith AM/FM sets that use selenium rectifiers I have merely swapped in a 1N4007. I upped the filter cap working V to 160 or 200. I have not found an issue. I think that the chassis is hot because it is an AM-FM radio and using caps to make it a "warm" chassis may greatly affect FM performance. I have 4 of these Zenith sets, the H725, the 7H820, and 2 from the early 1960s. All of thes sets have interlocks. The newer sets have no exposed screws, and I think that the knobs are captive by their clips and very difficult to completely pull off (tools required) I also have an RCA 8X71. All of these are hot chassis sets. IMHO, it is best to move the power switch to the hot side, add a polarized plug and use screw covers on any exposed screws on the older units.

Someone made mention of the lack of 3 pin grounded outlets on older houses. All US wiring has the "neutral" at ground potential. On all but the oldest outlets (Pre WWII), even ones without grounds, the holes are not equal in size. The longer slot is neutral (or is supposed to be).

[EdHolland]

The radio is here! Unfortunately we're busy tonight, so pics will have to wait until morning - I haven't set eyes on it yet, it's still in Mrs H's car. Sorry folks