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Posted: 6/28/2015 11:46:23 AM EDT
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A friend of mine got me to take a look at a tube he bought earlier this year. It's a year 2000 Litton mx10160 tube. He turned the gain pot up half a turn and got some edge glow. I took a look and it did have a small section of the edge glowing. The rest of the image was fine and the tube performs very well. I suggested turning the gain back down to the factory setting and it went away but we are wondering what this kind of edge glow means, if it means there is a problem or if the tube is nearing the end of its life? It's an otherwise very nice tube for the age and at factory settings there are no problems. I have a Litton tube of my own that's a year older but I don't want to adjust my pots to see if it does the same thing as I like it how it is and it still has its silicone sealant in, so I thought I'd ask here instead.
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