IIRC Whenever Zenith went SS they stuck with a SS trippler module...Atleast in their color sets (I've had limited exposure to Zenith's late tube/hybrid monochrome sets). The only sets with modules and HV rectifier tubes are the 4 tube hybrids (tube based horizontal system) and the higher tube count hybrids like my 12B13C52 (roughly half tube with a single duramodule for chroma that has a DIP demodulator chip on it).
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