Amperex BB EL84 - Circular mica slice purpose? - Byrd69

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Amperex BB EL84 - Circular mica slice purpose?

While inspecting and testing a bunch of EL84s, I noticed this feature on an Amperex. I then checked another Amperex and it has the same thing in the same locations.

Circular mica slices. What might these be here for?

Your interest may vary but the results will be same. (Byrd 2020)

I can't compete with the dead. (Buck W. 2010)

Cowards can't be heroes. (Byrd 2017)

Why don't catfish have kittens? (Moe Howard 1937)

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Topic - Amperex BB EL84 - Circular mica slice purpose? - Byrd69 13:56:09 02/07/23 (3)

RE: Amperex BB EL84 - Circular mica slice purpose? - Triode_Kingdom 08:15:36 02/13/23 (1)

Another photo - Byrd69 07:02:35 02/14/23 (0)

Very interesting. I hope someone may have an idea about this. - John PA 13:27:55 02/11/23 (0)

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