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#1
06-10-2025, 07:17 AM
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High vacuum sealant
I came across this from the Lesker company which deals with high vacuum equipment. https://www.lesker.com/newweb/fluids...-kjlc/vacseal/ I wonder if it would be useful as a preventative measure for those glass-metal picture tubes out there. Its a bit pricey though.
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#2
06-10-2025, 08:45 AM
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Pretty sure this was tried decades ago and the tubes still leaked with it (though I suspect they weren't treating the brass evacuation nipple under the socket).
The ETF preserved the sites of the late Ed Reitan and Pete Deksnis (spelling?) IIRC one of those was dedicated to the CT-100 and had posts going back to the 90s including some on Vacseal...I remember reading about it in highschool.
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
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#3
06-10-2025, 11:59 AM
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Yes, it has been tried at various times on various tubes. I bought a can of it for Scotty at Hawkeye to try on my leaky 21AXP22. He applied it to the metal/glass seals, but unfortunately the leak was a small ding in the metal/metal weld, which wasn't discovered until it was helium tested (which required necking the tube) at ETF. The tube is still at ETF waiting for someone to successfully set up a rebuilding facility, at which time Vacseal could be tried at the identified leak point.
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