Re: Blue phosphor scopes

Richard Knoppow

Do you mean pure blue?  There were some phosphors that had blue fluorescence and yellow or orange phosphorescence. Generally the blue was very fast decay and the yellow or orange long decay. A filter over the screen could be used to choose the color wanted. There were also very fast decay blue phosphors used for Kinescope recording tubes. In this case the film used was color blind.

On 6/25/2020 10:19 PM, Reginald Beardsley via wrote:
Did anyone other than Tek make scopes with blue phosphors? I was chatting with a friend and neither of us could think of anyone. All either of us had seen was green CROs.

Have Fun!

Richard Knoppow

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