[Lowfer] Measuring inductors

[Paul Daulton]

I have both the  Boonton 260 and Heathkit q meters. Also the AADE LCM. 

For a homemade qmeter and discussion go to Lloyd Butler's site- google VK5BR. 

Heath QM-1s appear on ebay occasionally. Nice instrument and not as 
fragile as the Boonton. 

I have had a lot of trouble with unknown torroids. Mini ring core 
calculator is a good program, free download.You can wind sample coil 
and back calculate the core values. 

Paul k5wms

Quoting rick kirby <smokinggun at verizon.net>:
> Hi All,
>
>  Im looking for suggestions for accurately measuring ferrite and iron
> torroids. I have been using a simple oscillator setup with a frequency
> counter and a calculator.It has worked so-so with iron core coils but with
> ferrite cores and inductances up in the hundreds of microhenries; its  all
> over the place.Maybe core saturation or something ; Im not sure. I have a
> scope ,counter, DMM and a cheesy little signal generator to work with.I have
> heard mixed reviews on the commercial meters; the chief complaint being they
> test the inductors at an audio frequency.I built an  adapter for the
> multimeter using a 74hc132 or something like that  and wasnt happy with that
> either. So what is everyone else using??
>
>               Thanks
>                         Rick  KA2PBO
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Paul Daulton K5WMS
beacon WMS 185.302 khz qrss30/slow 24/7
Jacksonville,Ar 72076
em34wu