MFJ-902 tuner uses a single toroid with taps. The toroid becomes hot on some frequencies with 100W but survives. I guess losses are small compared to convenience of a very small unit.
>From what I understand, the iron cores can have Q in excess of 300 if they are below saturation. How much will they can handle depends on the load. A reactance of 300 will add a resistance loss of 1 Ohm, and a reactance of 3000 will add 100 Ohm. So the same toroid can handle KW with a longer vertical but could overheat at 100W with a short vertical. Ignacy Fred Townsend wrote > > Ken: > .... Don't use toroids if you need taps. > 73 > Fred, AE6QL > > -- View this message in context: http://elecraft.365791.n2.nabble.com/Loading-inductor-Question-tp7513850p7517125.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
