crystal tester

I put together a little crystal tester circuit that I found on w2aew’s youtube channel. It works well. I built it almost exactly the same way that Alan does in his video.

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You can see the sockets that were added to easily swap crystals in and out of the circuit. Here is the schematic.

/images/crystal_tester_schematic_web.jpg

And here is the resulting waveform for one of the crystals that I tested in the circuit.

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