I have had very good success without the use of a balun on both my KAT1 and KAT2 with a 35' end fed and a 25' single ground counterpoise hooked directly to the ground lug. Less than 5 minutes to set up, and DX contacts on 3-5 watts (CW). Very cheap and effective antenna system, thanks to those great auto matching networks! 73, Phil, WA7URV K1 #220 K2 #2690