How Come Early CRTs contained more Ions?

[Old1625]

Originally Posted by zenith2134

The "phosphorous" vs "phosphor" thing reminds of of the old George Carlin skit: "it's not a HOT water heater; it's just a water heater!!!!" I shouldn't laugh though: I'm no chemist. Phosphor compositions & associated jargon confuse me pretty quickly.

So has anyone seen a tube where the beam-bend was so far off that it melted the grids?

If the water heater is bought from a reputable dealer it is a perfectly cool water heater. If bought from someone driving a box truck selling out in a supermarket parking lot it may be a hot water heater.

Phosphor I think is the correct term.

All the stuff mentioned in replies in this thread are (pardon my pun) on the beam. The ion spray from the cathode hit some part of the neck of the tube, or some target electrode, and did no harm.

The service life of those old CRTs was at the same time unpredictable. While there was a day when R&R CRT was normal procedure for the average tech today it is usualy R&R TV set. I had my share of the former. And now realise the latter.

Those of us that have to do this to restore an antique TV have still to do this. Otherwise it is not feasable.