I am sure [or at least I hope] I could sort through the information available in books and on the web for the answer to this question, but maybe someone reading this reflector can give me an 'instant' answer [preferably correct].
I intend to use a powdered iron core toroid as the form for an inductor which will be used in a matching network at the base of a vertical. The wire size is #16. Since I have already fabricated and measured a couple of these inductors, I know the number of turns needed to get 5.5 uH. I need 11 uH so I put two in series and the expected 11 uH was measured at the frequency of interest. The question I pose is: Is it preferably to use two of these inductors in series or use two stacked cores and the requisite number of turns to get 11 uH? The expected current through the 11 uH is about 3 amps if the Q is about 100. Will the Q be different if there are two inductors or one inductor made using two cores? [same size wire]. All comments are welcome. Even suggestions about where to search the web for an answer or where to look in a book for the equations that will resolve this matter. Or suggestions on where this has already been discussed. Or suggestions on the steps to use to quickly get the answer. I suspect that this is part of the 'lore' that has been developed which is why I am asking the question rather than trying re-invent the solution using first principles. Tod, K0TO > _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK