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My scope has a bulilt in parts tester. Very simple, but handy. Can also use it to look at diode junctions.
Can you guess where this is going?

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Naturally occurring diode junctions!

❤3

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The pyrite doesn't seem to work as well as the Galena, by far. There is only a very slight knee.

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I love this boat anchor. But man, it needs help

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I hate not having the right parts. Finding replacement transistors is such a pain in the neck.

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Selenium rectifiers!

🤩2

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