Hi Ignacy, This is a common misconception. (One which I held until recently. :-) It turns out there is no advantage to placing the balun at the input of the L-Network tuner. Since one end of the balun is grounded by the input to the tuner, it is still presented with the same stresses under high SWR situations. Baluns at the input and output both drive balanced loads equally well.
We've now put together a web page describing the impact of placing the balun at the input or at the output of a L-Network tuner. See: http://www.elecraft.com/KAT500/input_versus_output_balun.htm At the bottom of that page are several links providing detailed technical analysis of these configurations. The first two, by W8JI and W7EL are very clear discussions of this issue. 73, Eric WA6HHQ www.elecraft.com On 12/8/2011 3:17 PM, Ignacy wrote: > It seems to me that the story is more complex than it sounds. > > The input balun always works at low SWR and at 50 Ohm. It is very easy to > have such balun. A small balun would easily handle a KW without heating. ______________________________________________________________ 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
