[volt-nuts] Anyone know how to make stable inductors?

[Ed Breya]

Sorry about the previous double-posting - had email problems.

There is another option that occurred to me last night, to get an 
equivalent inductor from an accurate reference capacitor by using an 
active circuit gyrator. The problem of course is that the circuit will 
add errors too, diminishing performance. Also, for four-port use, the 
circuit would have to be battery-powered, and float within the fixture, 
adding more parasitics.

I could experiment with such a circuit fairly easily since I use my 
ground-converter for nearly all measurements, so the gyrator would not 
have to float. All in all though, it still seems that just using a 
capacitor and resulting negative inductance readout is the simplest and 
most accurate approach.

Ed