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Tube pin question?

Many tubes I've seen have what appear to be discolored/burnt pins. These have all been steel pins not gold plated ones. Was this caused during manufacturing? I imagine everything gets pretty hot when the glass was melted to create the vacuum. Concern or not a concern? Thanks!
rja

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rja's avatar
rja OP
2,384 posts
 
Thanks for your responses! I'll gently clean and then forget about it.
rja's avatar
rja OP
2,384 posts
 
Got it, thanks.
rja's avatar
rja OP
2,384 posts
 
Is this magnetite part of the vacuum seal between the glass and the pins?
If it is I understand how a strong contact enhancer could potentially cause problems.
I would imagine that a strong enough solution could possibly destroy the vacuum and thus the tube?

BTW: Thanks for your responses, I've found them helpful.
Probably the best thing to do is wipe the pins down a bit with a clean cotton cloth just to remove any potential oil or grease and call it a day.
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