All Zenith color solid state sets used a tripler. Early SS colors
from RCA, Sony, Motorola & others used a tube rectifier.
Now a few IIRC's
The first SS B&W Zenith used a tube. A rare set.
The first SS 19" Zenith, 100% hand wired also did. Also rare set !
The next generation ( hand wired with duramodules) used a stick
HV rectifier.
Your set is a K-line. K-line also introduced the first gen System 3 chassis
on TOTL 19 & 25" sets. Next year, L-line the last CC2 sets were built out
as a low priced set. About a 6+ year run for CC2's. Not bad !
73 Zeno
LFOD !