[MrFixr55]

I don't know if there was a cap short, I think that the heater on the 5Y3 just opened and had a cathode to plate short. I make this mod to all my older radios because the S and ST type 80 rectifiers have those thin triangular heaters. If the thick toaster element style of a 5Y3 can open up and hit the plate, then the older styles sure as #&!! can and trying to find a power transformer for something like an RCA R7A Suprette is no fun!
There was no hum prior to the fire, and this was in the early 70s so the radio was about 25-30 years old. I can't remember if the caps were replaced. I have 2 Zeniths, a 6G001 Universal and an 8G005 Transoceanic, both with the original filters and no hum. Same with a 1956 DuMont RA354. All have CD or Mallory multicap cans, and no hum. However, I do plan to recap both.

All 3 are battery - electric sets with 1.5V tubes. However, there is not one AA5 or transformer powered radio in my collection that has the original caps.

Some day I will publish the list of radios I have, with pix. Currently, there 80 radios in my collection, not counting the vintage HiFi, vintage Garrard turntables, 1970s Japanese HiFi (about another 20), Transistor radios (about 10), 1950s and 1960s hearing aids (about 6) and TVs (about 10). The count is heavy on 1920s 3 dial units, late 1920s, mid 1930s to WWII, Post war to 1980s, very light on 1930 -1935. IMHO, my most prized, due to historical importance, in alphabetical order are:
A-K 10C, (1923-1924), AK20 (1924), FADA 160 (1923) GE S-22A (RCA R7A, Ca 1931), Philco Model 20 (1930) RCA (GE) Radiola II (1922), RCA Radiola 16, 17 (1927), RCA Radiola 80 (1928), Westinghouse Aeriola Sr (Wooden face, 1921-1922), Westinghouse RC (1922). These radios were all repaired or restored by me. The Aeriola Sr, RC and the FADA 160 are all 100 years old or older. The AK-10 is 99-100 years old.