Quote:
Originally Posted by Olorin67
Wouldnt an all glass tube be safer for high voltage also? Less hazaard to wannabe tv servicers.
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Yup! I remember the first time that I discovered that *rectangular* metal cone CRTs existed... reaching into a 17" RCA to pull out a tube that was not lit.
For a brief time, there were advantages:
1. Lightweight, at a time when most products were "slightly higher West of the Rockies" due to shipping charges.
2. A moderate degree of inherent implosion protection, since the FP glass was put in compression as the assembly cooled after the FP was attached.
3. Larger sizes for low production sets, as expensive glass molds were not needed. I doubt that the 19", 24" and 30" inch sets would have been made had metal funnels not been used.
4. Better viewing, due to flatter screen, which helped to avoid/reduce room glare.
jr