[Elecraft] OT: Ferrite Identification Question

[Dr. William J. Schmidt, II]

You actually need more than one datapoint in most cases to identify the correct part. Simply measuring the reactance with a nice antenna analyzer at several frequencies (a few loops of wire through the device) and matching that up with the theoreticals given in the data sheets will tell you everything you need to know (except saturation... And you can get that from the size). 


Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
 
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> On Jun 4, 2015, at 11:32 AM, James Bennett <w6jhb at me.com> wrote:
> 
> A bit off-thread, but sorta related, as these things ARE used for antennas with my K3/KX3!! I have a bunch of ferrites - donuts, clamp-ons, beads, etc. that I’m trying to identify the mix. With the guidance of Tom/W8JI I’ve figured out how to use my AIM-4170C analyzer to show at what frequency these things have an R=X value with Q=1. However, I’ve not been successful relating that frequency data to the mix number. An email to Fair Rite has gone unanswered, and trying to wade through their web site is mind-boggling. Does anyone on this list have a URL that points to this information?
> 
> Thanks, Jim / W6JHB
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