Electronic – Help identifying vintage component

componentsidentification

I have a component I can't identify. It is a black plastic case component 1.4 x1 x0.7cm in size. Has three leads and what appears to be a hole in top where some black resin was poured in. Labelled as such:

6626 / P-B 72053 / 1 8 8

mystery component

Google searching the label returns junk results. I can't even guess what type of component this is, since the 3 leads have no appearant continuity or resistance between each other. I was told this was scrapped from a reel-to-reel computer.

Just so I'm not making a habit of asking questions I can answer on my own, and to help anyone else, Is there a preferred ident method or search engine I should try instead of google?

Best Answer

Looks like a late 1950's/early 60's Germanium transistor. Use a multimeter in diode testing setting to figure out where the PN junctions are. You should see some 0.3V forward voltage across these, and in reverse, the multimeter should display an open circuit.

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