Sir KilgoreCemetery . . . . .
I think that you lucked out on this one, as this is a '40 model and most of those blocks . . . the one of which you DID zero in on . . . . were more prolifically used in the '30' models.
After laboriously checking out all that your pic would let me see, that is item # 40, in which, there are two 0.01 capacitors being potted inside.
In present 21st Century time, you would want to replace them with X or Y rated safety capacitors, that are being rated to be safely wired across the AC line, such as these are .
With the old paper caps, they were being across the AC line and the AC line was working just fine. . . .until a storm brewed up and there was lightning, then the lightning bolt hits the AC line outside and enough of an instant excess of voltage runs inside the house, finds that cap and makes a pinhole arc thru the paper dielectric.
That instant of having an ionized path, then lets the full wrath of that 120VAC at up to potential decades of amps then RUSH in across the same conductive path, and explode the cap and blow out its end caps.
UNTIL there is an open circuit again, by no capacitor being there anymore. Ahhhhhhhhhhhhhh . . . . smell that distinctive aroma of OZONE ! Plus blackened adjunct chassis areas. . . .no extra charge !
Zenith got rid of all of that tom foolery, by just replacing most capacitors with 1KV rated disc ceramic types, where they didn't want to worry about cap leakage again .
Looks like someone in the past had done some shortcut servicing by just shunting one of the sets two wet electroltic capacitors with the YELLOW Aereovoz 16u at 450vdc dry electrolytic.
The rest of the A-B-C sufixed components are relating to components which are hidden within metallic cans, like the 2nd IF transformer, or in the oscollator section or the RF sections.
The 'potted' capacitors referred to are these:
No, those are being just conventional "postage stamp" silver micas . . .he has found the "potty"
73's de Edd
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