Phillips 25 Inch CRT

[Electronic M]

Originally Posted by dieseljeep

I bought a 32" Zenith in the mid-90's that had a Japanese sourced CRT.
I was talking to another tech and he mentioned that it was probably a Toshiba.
I often wondered how a firm the made one of the best CRT's, turned into one that made the worst!

Environmentalist...The CRT division went to hell when chemicals they had been using were banned, and regulations forced them to change their process.

[old_tv_nut]

Originally Posted by Electronic M

Environmentalist...The CRT division went to hell when chemicals they had been using were banned, and regulations forced them to change their process.

That's interesting. Do you know what chemicals?

The only environmental problem I ever heard of was cadmium in the green phosphor, but that was eliminated much earlier and had nothing to do with reliability of the tubes.

(Note, there was no reason I would have heard of the source of the reliability problems, so I am just curious and not implying it wasn't environmental issues.)

[jr_tech]

Originally Posted by Electronic M

Environmentalist...The CRT division went to hell when chemicals they had been using were banned, and regulations forced them to change their process.

I suspect it was freon cleaning of election gun parts that was discontinued.

jr

[old_tv_nut]

Originally Posted by jr_tech

I suspect it was freon cleaning of election gun parts that was discontinued.

jr

Thanks - that makes sense

[dishdude]

Originally Posted by Electronic M

Environmentalist...The CRT division went to hell when chemicals they had been using were banned, and regulations forced them to change their process.

Yeah a lot of chemicals were banned in the 90's, and I think that caused a lot of the issues Zenith CRTs from this era experienced. Also why you saw a lot of cars from this era with factory paint peeling off in sheets.