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Old 10th Feb 2018, 5:22 pm   #5
Join Date: Dec 2007
Location: Shropshire, UK.
Posts: 3,052
Default Re: AF 11* Transistors. Innards Removal?

I think the filling is silicone grease.
However, my impression is that exposing the guts to normal, 'dirty' atmosphere will make them unreliable - isn't that why they're hermetically sealed?
As far as disguising transistors is concerned, bear in mind that many types were offered in cosmetically different versions anyway, at different times and by different manufacturers, so there's no really 'standard' appearance.
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