Choosing components -- colors

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7 years 1 month ago #5612 by Ty_Eeberfest
I don't know that this is particularly relevant but I'll mention it anyway...

A while ago I got some IN-18s and they turned out to have really bad cathode poisoning. I used the overcurrent method to repair them. They were poisoned badly so I ran the current up pretty damn high (20mA I think) for several hours. They cleaned up and worked fine after that, BUT: for about the first 100 hours of normal (4mA) operation after repair they had major purple haze. The haze faded away, the tubes are still working fine over a year later and the color is proper orange with no purple or blue.

Look into it later when the dust is clearing off the crater.

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6 years 10 months ago #5739 by sudorandon
Just to give an update, it seems the majority of the "pink haze" in my tubes faded away pretty quickly. They reached a more orange color profile like I was expecting after probably only an hour or two of operation.

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