Hi Daniel >I'm just posting this so that someone can tell me ... NO - DON'T DO THAT - or - >DO THIS.
OK, use FT 43 material. You want to make a broadband transformer. You want tight coupling, but you need the right turns ratio. If the small loop has a radiation plus loss resistance around 1 ohm, you need a 1:7 turn ratio to match 50 ohms. You want the shunt reactance of this 7 turn coil to be much more than 50 ohms. FT 43 can do that. If you run 8 watts, you need 20 volts on 7 turns. An FT-50-43 core will run about 138 gauss at 3.5 MHz to do this. Use a bigger core to reduce loss, handle more power, and have enough room for the windings. 73, de Michael, AB9GV _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
