Remote thermometer (CB9487E)

We found this circuit in a 90s Linear Technology documentation. The circuit uses components from the time and the indicator is of the analog type.

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End of Time Warning Timer (CB4673E)
We find this circuit in a 1995 documentation. It warns when the timing is nearing its end, with...
Overtone FET Oscillator (CB13085E)
The oscillator in the figure has its frequency determined by the crystal. The indicated value is...
WWV 10 MHz converter (CB9184E)
WWV is the standard frequency station of the United States government. This station broadcasts a...