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Title: CV1090/VT90 & 931 Tube Info Post by: WA2SQQ on February 06, 2023, 05:06:13 PM My mom always told me that the only dumb question is the one you don't ask. I just inherited a box of tubes from the estate of a close friend. Found two tubes that I'm really not familiar with. The 1st, which I believe is a CV1090 / VT90 appears to be some sort of radar tube. See photo attached
The second tube (I have two) is a "931" which is a photo multiplier tube. I give up, what were these used for? Any additional info, on either, would be appreciated! Title: Re: CV1090/VT90 & 931 Tube Info Post by: Pete, WA2CWA on February 06, 2023, 06:59:05 PM The second tube (I have two) is a "931" which is a photo multiplier tube. I give up, what were these used for? Any additional info, on either, would be appreciated! A photomultiplier tube, electron multiplier tube that utilizes the multiplication of electrons by secondary emission to measure low light intensities. It is useful in television camera tubes, in astronomy to measure intensity of faint stars, and in nuclear studies to detect and measure minute flashes of light. https://www.britannica.com/technology/photomultiplier-tube Photomultiplier Information (https://www.google.com/search?q=uses+of+photomultiplier+tube&client=firefox-b-1-d&sxsrf=AJOqlzWv-1bCyFfd-h2GXws2S7AGDWBZgQ%3A1675727067769&ei=25DhY6_bLqrm5NoPwoOfkAc&oq=What+does+a+photomultiplier+tube+do&gs_lcp=Cgxnd3Mtd2l6LXNlcnAQARgDMgUIABCABDIFCAAQhgMyBQgAEIYDMgUIABCGAzIFCAAQhgM6CAgAEIYDELADOgcIIRCgARAKOgYIswEQhQQ6DQgAEI8BEOoCELQCGAE6DQguEI8BEOoCELQCGAFKBAhBGAFKBAhGGABQqypYhUpgw4gBaANwAHgCgAGZAYgBhw-SAQQyMC4zmAEAoAEBoAECsAELyAEEwAEB2gEECAEYCg&sclient=gws-wiz-serp#ip=1) 931A Information (https://www.google.com/search?q=uses+of+931a+photomultiplier+tube&client=firefox-b-1-d&sxsrf=AJOqlzXS3Tb2AvoCc-7sAiVjCVCO75PifA%3A1675727178450&ei=SpHhY-L3GrSo5NoPnemsoAo&ved=0ahUKEwjixNiZioL9AhU0FFkFHZ00C6QQ4dUDCA8&uact=5&oq=uses+of+931a+photomultiplier+tube&gs_lcp=Cgxnd3Mtd2l6LXNlcnAQAzIICCEQoAEQwwQ6CggAEEcQ1gQQsAM6BwgAEA0QgAQ6BQgAEIYDOgoIIRCgARDDBBAKSgQIQRgASgQIRhgAUN8NWNcoYIgwaAFwAXgAgAGgA4gBsAiSAQczLjMtMS4xmAEAoAEByAEIwAEB&sclient=gws-wiz-serp) Title: Re: CV1090/VT90 & 931 Tube Info Post by: Pete, WA2CWA on February 06, 2023, 07:01:58 PM My mom always told me that the only dumb question is the one you don't ask. I just inherited a box of tubes from the estate of a close friend. Found two tubes that I'm really not familiar with. The 1st, which I believe is a CV1090 / VT90 appears to be some sort of radar tube. See photo attached CV1090 / VT90 (https://www.google.com/search?client=firefox-b-1-d&q=CV1090+%2F+VT90)Any additional info, on either, would be appreciated! |