Hello,

I have a few 2N2222A in TO-18 metal can package as pictured below:

http://i.imgur.com/UYKAuyD.jpg
http://i.imgur.com/F5AzBtL.jpg

Are these germanium or silicon?

What would be the advantage of using the TO-18 package over TO-92 package?
What is the approximate value of that transistor in TO-18 package (ST
Brand)?

Thanks


Chetan
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