Thread: How long do old circuits/electronics last for?
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Eeyore Eeyore is offline
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Default How long do old circuits/electronics last for?


wrote:

Tubes do not fail from not being used, unless they are broken or leaky

Not actually true. Over time their characteristics drift from ionic
contamination mainly IIRC and the emissivity of the cathode gradually
reduces too. I've seen tubes that have actually gone zero emission even
though the filament still works.

Graham

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