|
I'm now about 60% through the recap. With the chassis vertical,
power transformer at lower left, the left half and the bottom 1/4 is done
except the 4 big power supply caps.
Interesting tidbit: there are many 0.1 uF "paper" caps in what looks like
ceramic tubes. I'm replacing everything, and the replacement
Panasonic mylar ones (listed 5%) are typically within 1% ...
but so are most of the ceramic case ones removed, and they all
would be in tolerance at 5%. Could these be early plastic caps? Removed waxed paper tube caps are all over the place in value.
I found another cathode resistor that was low (by a factor of ten),
i.e. it is marked that, and measures it too,
and the voltage listings again say (and so does a reasonable current)
that the schematic value must be right. This one clearly is original ...
from RCA! Bizarre. Were the assembly line workers color blind?
(That's actually meaningless in this case, since it was black band
versus brown, unlike black versus red in the previous case).
Was it traditional to use 50-50 solder in those days? I have older
radios and TVs that had 60-40 (tin-lead) solder. And the solder
is in very very big blobs, much bigger than necessary. There's
probably a pound of excess solder (maybe a slight exaggeration.)
|