Sets is from abt 1968. I had one in the olden days. Used it under
the dash of my '72 Toronado
https://www.youtube.com/watch?v=_YEVmUJgJ9c then later built it into my bed. VERY
well made & good running set.
Smell may be just dust but I would open it & see if anything is too hot to
touch. Also run it in the dark & look for arcing around the HV.
73 Zeno
LFOD !