link (cap and inductance calculator, DIY capacitance bridge project)

[dai h.]

don't know enough to say how useful, but found a page with some interesting looking stuff:

Conrad's Free Stuff


Capacitance and inductance calculator- converts between most forms of impedance

How to build a capacitance bridge (pdf file)

[Joe Gwinn]

Be aware that the self-capacitance of an inductor (such as a pickup coil) cannot be measured by a four-arm impedance bridge of any kind.

Nor can any handheld LCR meter measure the self-capacitance of an inductor.

The problem is fundamental, and is not due to bad design or cut corners in the instrument or bridge.

[dai h.]

cool. I've no awareness (so thanks for commenting!).

(Can I ask what sort of use the cap. and inductance calculator would be useful for?)

[Joe Gwinn]

Basically, one measures the inductance at a frequency well below resonance, measures the self-resonant frequency with a number of capacitors connected in parallel, and solves for the "missing capacitance". The method is documented in Terman. The issue is extensively discussed in prior posts.

[dai h.]

okay thanks Joe