Quote:
Originally Posted by John Folsom
..... that each temperature ramp up/ramp down is a feat in itself just not to rupture the bulb or crack the suspended internal phosphor screen, it's not easy.......
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At least with the EMI 6/6 CRT that I wrote about in the 1980s we had the option of not heating the whole CRT. In retrospect it was likely a wise decision to pump it cold. The early shadowmask CRTs look like a much more difficult problem. I wonder how many failures RCA had before they could reliably produce these tubes.