Size is the most important parameter. I've read your tutorials several times and they are an inspiration but it's just like linear amplifiers: you can't say an amplifier designed for intermittent service like ssb or cw is poorly designed because it doesn't pass the BOK test. It's horses for courses. A properly designed choke for an ocfd will not over-heat but these are few and far between it seems.
David G3UNA/G6CP > On 15 July 2020 at 21:07 Jim Brown <[email protected]> wrote: > > > On 7/15/2020 11:46 AM, CUTTER DAVID via Elecraft wrote: > > Ferrite-cored chokes (balun) heat up and change apparent swr. > > Not if they are properly designed and properly applied. And not all > antennas can be choked -- in general, only resonant antennas can be > effectively choked. Chokes applied to non-resonant and/or poorly > balanced antennas (like OCF wires) are, in general, NOT effective, and > WILL likely overheat. > > I suggest a study of > k9yc.com/RFI-Ham.pdf and > http://k9yc.com/2018Cookbook.pdf > > 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 > Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
