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Trying to find out what Ferrite material this is.
Roy Lewallen wrote:
I agree that a 259B does not make a good general purpose instrument for measuring inductor values over the HF range. In fact, there are very few instruments which are. One of the few I know of is the HP 4191A vector impedance meter, but it's not likely to be found in many amateur workshops. Making good impedance measurements at HF is often very much more difficult than most people realize. Look at the L/C meter from AADE (Almost All Digital Electronics) www.aade.com which a 1 hour kit for $99. It is quite accurate and uses a variable frequency oscillator so that smaller values of inductance and capacitance are measures at higher frequencies. I own an 8753 HP Network Analyzer and still use the L/C meter most of the time since it is so convenient. It easily can tell the differences between 73/43/31/61 materials. I usually wrap 2 turns thru the torroid to do the measurement. 73, Larry, W0QE |
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