Quote:
Originally Posted by Studio263
One of these was that the UHF tuner worked on the opposite polarity to the rest of the set and so had to be isolated with plastic nuts an bolts, an accident waiting to happen I thought.
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That sounds very much like a "production bodge". I'm wondering if it was a bought-in UHF tuner that Perdio simply grafted into their existing design?
The mid-1960s was also the time when the industry was switching from germanium to silicon transistors (and generally from P-N-P to N-P-N as well with a change in which supply-rail was 'earth') so I can easily imagine how a small manufacturer with limited development funds would want to keep as much of their existing design in production and graft in only the bare minimum of what they needed to UHF/625-line-ize it.