[Lowfer] Measuring inductors

[Ed Phillips]

C. Turner wrote:

>There's this:
>
>http://wb6dhw.com/RLC_Meter/A%20Low%20Cost%20Automastic%20Impedance%20Bridge.pdf
>
>(Yes, the link really does say "Automastic"!)
>
>If you already have a good sound card for SDR, you are all set!
>
>As was already mentioned, if a core is involved, it's best to measure it 
>at the frequency of operation.  Also, to some extent, the response to DC 
>current can be gauged by exciting an added secondary winding with a true 
>DC current source (e.g. Hi-Z to avoid loading) - or one could observe 
>the effects of permeability caused by a permanent magnet as a very 
>general and non-scientific approach.
>
>FWIW, I have a GenRad 1650A and according to its book, it's usable to 
>about 200 kHz with an external generator:  It gives procedures for doing 
>so, providing correction factors and expected accuracy.
>
>73,
>
>Clint
>KA7OEI
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