On 12/13/2011 10:43 AM, Dean Straw wrote: > I used a bifilar wound CM choke at the input of the ARRL high-powered tuner > described in late editions of "The ARRL Antenna Book." It had 12 bifilar > turns of #10 AWG Formvar wire on a 24-inch diameter OD Type 43 core.
Jerry said that Zo for this sort of wire and winding style was about 50 ohms. I wound some that way, and they acted like they were close to 50 ohms (as observed by SWR measurements) when inserted between TX and tuner. 73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
