John, KD4KGU wrote: "The two center conductors are used for the feedline and the shield floats at the antenna and is grounded at the shack." ========== I'm still wondering why you would want to use a 100-ohm feedline to feed an antenna which you said your MFJ-269 indicated the feedpoint Z was 50 ohms at resonance. 73, de Earl, K6SE 67 countries with K2 #2622 and counting.....