Note: The input voltage to the LM317 must be at least 1.5v greater than the output voltage.Read More...

Common Pin OutsRead More...

The S meter is supposed to represent a calibrated signal strength of a received signal.
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Some Notes on MixersRead More...

Attenuators
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Some Notes and Information

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Some common data on commonly used parts

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One of the most used audio chips in any QRP project

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My Ethernet Notes

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Transceiver SINAD and 20 DB Quieting Measurements

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A simple way to measure impedance of an unknown active circuit.

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