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Old June 17th, 2016, 01:50   #4
c3sk
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Good writeup BenG.

Few things:

I think you mean IIT instead of ITT (ITT would be the nightvision company now known as Exelis/Harris)

I wouldn't say a Data Sheet is required, many, if not all contract tubes are supplied without a Data Sheet as they are made to be above a minimum contract spec. Also some commercial tubes (F9800 series tubes) also have a minimum performance spec they must perform at or above in order to be classified as such from the vendor. Since Data Sheets are generally not cheap to get made, if you can find the minimum performance specs for a specific labeled tube, it is usually good to go as I have never seen a company label a tube as one thing when it was something completely different.
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