Guy, Look at Fair-Rite 2643167851 This MIGHT allow several turns of some smaller window line, maybe enough to be useful at HF. Remember that you need a complete magnetic circuit, so this makes it unlikely that ferrite parts designed for ribbon cable will fit your need.
I assume you're attempting a common mode choke. Take a look at the latest version of my RFI tutorial, which shows some very nice medium power HF common mode chokes having a Z of about 100 ohms wound on #31 toroids with #14 THHN. You could raise the impedance by spreading the bifilar pair a bit. Unlikely you'll achieve a perfect match, but we both know that's probably not a deal killer for a section of line that's less than 1/30 wavelength at the operating frequency. :) http://audiosystemsgroup.com/RFI-Ham.pdf 73, Jim K9YC ______________________________________________________________ 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
