On 5/31/2017 8:26 PM, Michael Walker wrote:
Thanks All Sean, I have at least 3 printed opies of W1HIS's pdf and I totally forgot that was in the back. It was that article that made me a choke everything convert.
Nice article, but if you want the quick version, use a method suggested by W8JI. Determine the frequency at which R = |+jX| and look at the Fair-Rite products web site to cross reference to the closest material. The R = |+jx| frequency should correspond to where the u' and u" curves intersect. Usually good enough. If two materials meet the criterion, then the tiebreaker would be to look up the nearest Fair-Rite shape to the one you have in the two materials and see which material has the corresponding inductance to what you are reading on the meter. Rick N6RK _________________ Topband Reflector Archives - http://www.contesting.com/_topband