A sensitive, frequency-modulated dip meter capable of measuring resonator Q

Qrp Gaijin’s version of a dip meter to measure resonator Q:

A highly-sensitive, narrow-band frequency-modulated dip meter offers a simple way to measure resonator Q.
I have been working with an unusual dip meter circuit recently that has some interesting properties.
The dip meter, also called a grid dip meter, is a simple homebrew instrument that offers a wide range of measurement possibilities.

More details on Qrp Gaijin’s blog.

Check out the video after the break.

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