I wanted to add these to topics already in progress but I can't find them using my phone, how do the Youngs do this?
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Here is a 24.MHz crystal opened up, sorry for the 007 view but it need some magnifying
The crystal wafer is attached to the U shaped metal springy bits. The leads are attached to the inside of the U. The crystal was 24MHz fundamental and is commonly found on USB devices. I've seen the square flat bricks taken apart but don't have a link.
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Of course they were tested on my K7QO MUPPET G3UUR xtal tester from the transistor series that used to be on YouTube. I did manage to save a few of the episodes, but the project box ones (folded metal and pcb) were gone.
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The red color is from Krylon stained glass spray? paint. I should have baked the board, bit chipped up after 7 years. Only strong rocks less than about 4 MHz or greater than 16MHz will oscillate. Have some fundamental 50MHz-ish rocks I need to make a circuit for. ICM used to sell a board that would work upto 60 Mhz with just some resistor changes.
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Enough ramblings?
Michael
N9XYP