Originally Posted by tubetwister
Riddle what is a 15GP22 what does it fit what does it do and where could anybody reliably find one and if so how much working only ?
The 15GP22 is the first registered color TV CRT.
You can reliably find one about three feet in front of me, currently showing
"America's Got Talent". There are about 150 total known,
of which about 36 work. The "typical" quoted price of a whole set (RCA
CT-100) with a good one is $4000-4500, however recent ones have been
varied quite a bit in price, up or down. After a rather long dry period several have shown
up -- good or bad .. in the last two years.
Trivia question: how many adjustments are there in the "usual" set using
that tube, the CT-100? Answer .. I counted this morning .... 81. There are
two too few to do a "full" color calibration unless you use 1% resistors in the
color matrix, which thankfully my set is close to by accident.
Question: what was the first flat screen color CRT? Answer ... the 15GP22.
That's actually true ... while it has a curved front the screen is not on
the front glass, but rather on a flat piece of glass inside it. Because of this
it only has a real 11.5 inch picture.
What does the picture look like on one? Very, very good indeed, as good
as an NTSC set can look without a digital de-interlacer. This set has excellent
color resolution with no fringes. Until digital innard NTSC sets came along
only the CT-100 and the 21 inch set using the same signal chain
had full 1.5 MHz color resolution, and zero "wrong color fringes" at
color transitions. Downside is that the 15GP22 had inefficient phosphors
and is not very bright.
As to the "Apple" tube, the first consumer products were sold by Sony
under the trade name "Indextron". There were earlier uses by the military.
Google Indextron or "Philco Apple CRT".
Question: who made the first consumer product with a CRT
labeled "Chromatron", which was a competitor to the Apple tube
in the non three separate gun (as used in the 15gp22) race,
and why wasn't it actually a Chromatron, and what
succeeded it (hint: that was a huge commercial success)?