Ken: Toroidal cores have many fine qualities for loading coils. Of course not all core have the same qualities so be sure you have the right Al rating. You will want a low rating. Also remember you will lose those fine qualities if you saturate them so be sure your core is big enough for 250 watts (2.5x safety margin). I use Teflon wire on mine for lower losses. Finally, it is very difficult to tap a toroid whereas coil taps are easy on an air core coil. Don't use toroids if you need taps. 73 Fred, AE6QL
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Ken Alexander Sent: Monday, April 30, 2012 8:15 AM To: Elecraft Subject: [Elecraft] Loading inductor Question Folks, Given that inductors on toroid cores are used extensively in autotuners, is there any reason (assuming I choose the right size core, made of the correct material for the application and winding it with the right size wire) for not using one as a base loading inductor on a vertical antenna? I'm talking 100 watts maximum transmitter output here. Any down side to doing this? Thanks and 73, Ken Alexander VE3HLS ______________________________________________________________ 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 ______________________________________________________________ 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
