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

Heatercathodeshort · 2nd Aug 2022, 8:11 am

I think your spot on Frank. Mullard used basically the same ion trap gun for many years from around 1950 to 1958 aluminised or not. It was the introduction of the 110 degree AW43-88 in 1959 that finally did away with it.
I do not remember GEC or Ferranti ever using an ion trap magnet with their aluminised triode tubes. John.

2nd Aug 2022, 8:11 am	#20
Heatercathodeshort Dekatron Join Date: Jun 2005 Location: Warnham, West Sussex. 10 miles south of DORKING. Posts: 9,147	Re: Ion burn, When did aluminised CRT's start and become the norm? I think your spot on Frank. Mullard used basically the same ion trap gun for many years from around 1950 to 1958 aluminised or not. It was the introduction of the 110 degree AW43-88 in 1959 that finally did away with it. I do not remember GEC or Ferranti ever using an ion trap magnet with their aluminised triode tubes. John.