The Q meter is one of those nearly forgotten pieces of gear, like a grid dip oscillator. If you need to wind your own coils, by the way, you could do worse than see how [JohnAudioTech] does it.

This Q-meter is unusual on more than one count: it is capable of displaying directly the value of the series resistance, and is based on a series-tuned oscillator. The advantages associated with this ...

Although it sounds like some Star Trek McGuffin, a Q-Meter is a piece of test gear that measures the Q factor of a tuned circuit. [Thomas] got a Boonton meter from 1962 that wasn’t in very go… ...