Fraser, I don't claim to be an expert on the topic, but I think it has to do with the manner the coil is wound versus how a transformer is wound.
The Topband reflector always seems to have periodic Q postings, you might try searching the archives http://lists.contesting.com/_topband/ and W8JI http://www.w8ji.com/loading_inductors.htm for some discussion on the topic. Cheers, Julius n2wn _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com

