Does anyone know the real reason why these later Trinitron tubes (in the "FD" Trinitron era) are notorious for short lifespan? Was it more of a cost-cutting thing (lack of Q.C. and/or less depositon of cathode material/surface area) or was this a deliberate scheme to usher in the flat-panel era? Planned obsolescence from Tokyo?
We had a 1987 27" Trinitron KV2729R which was thrown away still working like new, with a TON of hours on it and no repairs. and my '78 12" trinitron KV1205 is bright as the day is long, as are my PVM1390s from 1988 and 89