UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Ion burn, When did aluminised CRT's start and become the norm?

AdrianH · 31st Jul 2022, 11:56 pm

This thinking about this and thought I would throw it out to the wider knowledge base.

The 1948 Pye set I have (duff tube) is a straight gun CRT that would suffer from ion burn, I have seen an advert for a 1951 TV with aluminised CRT, so assume that would be a straight gun, my 1954 Fergy has an ion magnet to bend the beam so Ion burn is not an issue.

So just wondering when aluminised CRT's were first done and when they became the norm?

Adrian

31st Jul 2022, 11:56 pm	#1
AdrianH Octode Join Date: Mar 2020 Location: Blackburn with Darwen, Lancashire, UK. Posts: 1,573	Ion burn, When did aluminised CRT's start and become the norm? This thinking about this and thought I would throw it out to the wider knowledge base. The 1948 Pye set I have (duff tube) is a straight gun CRT that would suffer from ion burn, I have seen an advert for a 1951 TV with aluminised CRT, so assume that would be a straight gun, my 1954 Fergy has an ion magnet to bend the beam so Ion burn is not an issue. So just wondering when aluminised CRT's were first done and when they became the norm? Adrian __________________ Asking questions and learning, or trying to! Youtube EF91Valve