[Amps] Silly Inductor Question

[Will Matney]

Vics right. On some LCR meters, they only have a few test frequencies,  
generally up to around 100 KHz or so, the expensive ones maybe 1 MHz.  
However, some have an external frequency jack where a signal generator can  
be connected. You select external frequency with a switch and connect to  
the ext. jack with the generator.

Will



On Wed, 09 Feb 2005 08:15:55 -0800, Vic Rosenthal <vic at rakefet.com> wrote:

> Angel Vilaseca wrote:
>
>> Now to obtain .5 mH it will take much more than just one or two turns.
>> To know how many, you will need some way of measuring inductance. Add
>> windings until you reach your target value.
>
> Keep in mind that when you measure inductance of a toroid you must do it  
> at the operating frequency, since the characteristics of the core  
> material vary with frequency.  I find the MFJ and Autek antenna  
> analyzers useful for this.  An inductance meter that does not allow you  
> to select the measurement frequency may give incorrect results.
>



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